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Americas HeadquartersCisco Systems, Inc.170 West Tasman DriveSan
Jose, CA 95134-1706 USAhttp://www.cisco.comTel: 408 526-4000
800 553-NETS (6387)Fax: 408 527-0883
Catalyst 2960 Switch Software Configuration GuideCisco IOS
Release 12.2(50)SE March 2009
Text Part Number: OL-8603-06
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THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN
THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS,
INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE
ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION
OF ANY PRODUCTS.
THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING
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THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU
ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY,
CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.
The Cisco implementation of TCP header compression is an
adaptation of a program developed by the University of California,
Berkeley (UCB) as part of UCBs public domain version of the UNIX
operating system. All rights reserved. Copyright 1981, Regents of
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Catalyst 2960 Switch Software Configuration Guide Copyright
20042009 Cisco Systems, Inc. All rights reserved.
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Understanding Command
Understanding the Help
Understanding Abbreviat
Understanding no and de
Understanding CLI Error Modes 2-1
System 2-3
C O N T E N T S
Preface xxxiii
Audience xxxiii
Purpose xxxiii
Conventions xxxiii
Related Publications xxxiv
Obtaining Documentation, Obtaining Support, and Security
Guidelines xxxv
C H A P T E R 1 Overview 1-1
Features 1-1Ease-of-Deployment and Ease-of-Use Features
1-2Performance Features 1-3Management Options 1-4Manageability
Features 1-5Availability and Redundancy Features 1-6VLAN Features
1-7Security Features 1-8QoS and CoS Features 1-11Layer 3 Features
1-12Power over Ethernet Features 1-12Monitoring Features 1-13
Default Settings After Initial Switch Configuration 1-13
Network Configuration Examples 1-16Design Concepts for Using the
Switch 1-16Small to Medium-Sized Network Using Catalyst 2960
Switches 1-19Long-Distance, High-Bandwidth Transport Configuration
1-20
Where to Go Next 1-21
C H A P T E R 2 Using the Command-Line Interface 2-1iiiCatalyst
2960 Switch Software Configuration Guide
ed Commands 2-4
fault Forms of Commands 2-4
Messages 2-5
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Contents
Using Configuration Logging 2-5
Using Command History 2-6Changing the Command History Buffer
Size 2-6Recalling Commands 2-6Disabling the Command History Feature
2-7
Using Editing Features 2-7Enabling and Disabling Editing
Features 2-7Editing Commands through Keystrokes 2-7Editing Command
Lines that Wrap 2-9
Searching and Filtering Output of show and more Commands
2-10
Accessing the CLI 2-10Accessing the CLI through a Console
Connection or through Telnet 2-10
C H A P T E R 3 Assigning the Switch IP Address and Default
Gateway 3-1
Understanding the Boot Process 3-1
Assigning Switch Information 3-2Default Switch Information
3-3Understanding DHCP-Based Autoconfiguration 3-3
DHCP Client Request Process 3-4Understanding DHCP-based
Autoconfiguration and Image Update 3-4
DHCP Autoconfiguration 3-5DHCP Auto-Image Update 3-5Limitations
and Restrictions 3-5
Configuring DHCP-Based Autoconfiguration 3-6DHCP Server
Configuration Guidelines 3-6Configuring the TFTP Server
3-7Configuring the DNS 3-7Configuring the Relay Device 3-7Obtaining
Configuration Files 3-8Example Configuration 3-9
Configuring the DHCP Auto Configuration and Image Update
Features 3-11Configuring DHCP Autoconfiguration (Only Configuration
File) 3-11Configuring DHCP Auto-Image Update (Configuration File
and Image) 3-12Configuring the Client 3-13
Manually Assigning IP Information 3-14
Checking and Saving the Running Configuration 3-14
Modifying the Startup Configuration 3-15Default Boot
Configuration 3-16ivCatalyst 2960 Switch Software Configuration
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Automatically Downloading a Configuration File 3-16
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Specifying the Filename to Read and Write the System
Configuration 3-16Booting Manually 3-17Booting a Specific Software
Image 3-18Controlling Environment Variables 3-18
Scheduling a Reload of the Software Image 3-20Configuring a
Scheduled Reload 3-20Displaying Scheduled Reload Information
3-21
C H A P T E R 4 Configuring Cisco EnergyWise 4-1
Managing Single Entities 4-1EnergyWise Entity 4-1EnergyWise
Domain 4-2EnergyWise Network 4-2Single PoE Switch Scenario
4-3EnergyWise Power Level 4-4EnergyWise Importance 4-5EnergyWise
Names, Roles, and Keywords 4-5Configuration Guidelines 4-5PoE and
EnergyWise Interactions 4-5Manually Managing Power 4-6
Powering the Entity 4-6Configuring Entity Attributes 4-7Powering
the PoE Port 4-8Configuring PoE-Port Attributes 4-8
Automatically Managing Power (Recurrence) 4-9Examples 4-11
Setting Up the Domain 4-11Manually Managing Power
4-12Automatically Managing Power 4-12
Managing Multiple Entities 4-12Multiple PoE Switch Scenario
4-13EnergyWise Query 4-13Using Queries to Manage Power in the
Domain 4-14Examples 4-15
Querying with the Name Attribute 4-15Querying with Keywords
4-16Querying to Set Power Levels 4-16vCatalyst 2960 Switch Software
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Troubleshooting EnergyWise 4-16Using CLI Commands 4-17Verifying
the Power Usage 4-17
Additional Information 4-18Managing Power in a LAN 4-18Managing
Power with IP Routing 4-18
C H A P T E R 5 Clustering Switches 5-1
Understanding Switch Clusters 5-1Cluster Command Switch
Characteristics 5-3Standby Cluster Command Switch Characteristics
5-3Candidate Switch and Cluster Member Switch Characteristics
5-3
Planning a Switch Cluster 5-4Automatic Discovery of Cluster
Candidates and Members 5-4
Discovery Through CDP Hops 5-5Discovery Through Non-CDP-Capable
and Noncluster-Capable Devices 5-6Discovery Through Different VLANs
5-6Discovery Through Different Management VLANs 5-7Discovery of
Newly Installed Switches 5-8
HSRP and Standby Cluster Command Switches 5-9Virtual IP
Addresses 5-10Other Considerations for Cluster Standby Groups
5-10Automatic Recovery of Cluster Configuration 5-11
IP Addresses 5-12Hostnames 5-12Passwords 5-12SNMP Community
Strings 5-13TACACS+ and RADIUS 5-13LRE Profiles 5-13
Using the CLI to Manage Switch Clusters 5-14Catalyst 1900 and
Catalyst 2820 CLI Considerations 5-14
Using SNMP to Manage Switch Clusters 5-14viCatalyst 2960 Switch
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C H A P T E R 6 Administering the Switch 6-1
Managing the System Time and Date 6-1Understanding the System
Clock 6-1Understanding Network Time Protocol 6-2Configuring NTP
6-3
Default NTP Configuration 6-4Configuring NTP Authentication
6-4Configuring NTP Associations 6-5Configuring NTP Broadcast
Service 6-6Configuring NTP Access Restrictions 6-8Configuring the
Source IP Address for NTP Packets 6-10Displaying the NTP
Configuration 6-11
Configuring Time and Date Manually 6-11Setting the System Clock
6-11Displaying the Time and Date Configuration 6-12Configuring the
Time Zone 6-12Configuring Summer Time (Daylight Saving Time)
6-13
Configuring a System Name and Prompt 6-14Default System Name and
Prompt Configuration 6-15Configuring a System Name
6-15Understanding DNS 6-15
Default DNS Configuration 6-16Setting Up DNS 6-16Displaying the
DNS Configuration 6-17
Creating a Banner 6-17Default Banner Configuration
6-17Configuring a Message-of-the-Day Login Banner 6-18Configuring a
Login Banner 6-18
Managing the MAC Address Table 6-19Building the Address Table
6-20MAC Addresses and VLANs 6-20Default MAC Address Table
Configuration 6-20Changing the Address Aging Time 6-21Removing
Dynamic Address Entries 6-21Configuring MAC Address Notification
Traps 6-21Adding and Removing Static Address Entries
6-24Configuring Unicast MAC Address Filtering 6-25viiCatalyst 2960
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Disabling MAC Address Learning on a VLAN 6-26Displaying Address
Table Entries 6-27
Managing the ARP Table 6-27
C H A P T E R 7 Configuring SDM Templates 7-1
Understanding the SDM Templates 7-1
Configuring the Switch SDM Template 7-2Default SDM Template
7-2SDM Template Configuration Guidelines 7-2Setting the SDM
Template 7-3
.Displaying the SDM Templates 7-3
C H A P T E R 8 Configuring Switch-Based Authentication 8-1
Preventing Unauthorized Access to Your Switch 8-1
Protecting Access to Privileged EXEC Commands 8-2Default
Password and Privilege Level Configuration 8-2Setting or Changing a
Static Enable Password 8-3Protecting Enable and Enable Secret
Passwords with Encryption 8-3Disabling Password Recovery 8-5Setting
a Telnet Password for a Terminal Line 8-6Configuring Username and
Password Pairs 8-6Configuring Multiple Privilege Levels 8-7
Setting the Privilege Level for a Command 8-8Changing the
Default Privilege Level for Lines 8-9Logging into and Exiting a
Privilege Level 8-9
Controlling Switch Access with TACACS+ 8-10Understanding TACACS+
8-10TACACS+ Operation 8-12Configuring TACACS+ 8-12
Default TACACS+ Configuration 8-13Identifying the TACACS+ Server
Host and Setting the Authentication Key 8-13Configuring TACACS+
Login Authentication 8-14Configuring TACACS+ Authorization for
Privileged EXEC Access and Network Services 8-16Starting TACACS+
Accounting 8-17
Displaying the TACACS+ Configuration 8-17
Controlling Switch Access with RADIUS 8-17Understanding RADIUS
8-18RADIUS Operation 8-19viiiCatalyst 2960 Switch Software
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Configuring RADIUS 8-19
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Default RADIUS Configuration 8-20Identifying the RADIUS Server
Host 8-20Configuring RADIUS Login Authentication 8-23Defining AAA
Server Groups 8-25Configuring RADIUS Authorization for User
Privileged Access and Network Services 8-27Starting RADIUS
Accounting 8-28Configuring Settings for All RADIUS Servers
8-29Configuring the Switch to Use Vendor-Specific RADIUS Attributes
8-29Configuring the Switch for Vendor-Proprietary RADIUS Server
Communication 8-31Configuring RADIUS Server Load Balancing 8-31
Displaying the RADIUS Configuration 8-32
Configuring the Switch for Local Authentication and
Authorization 8-32
Configuring the Switch for Secure Shell 8-33Understanding SSH
8-33
SSH Servers, Integrated Clients, and Supported Versions
8-33Limitations 8-34
Configuring SSH 8-34Configuration Guidelines 8-34Setting Up the
Switch to Run SSH 8-35Configuring the SSH Server 8-36
Displaying the SSH Configuration and Status 8-37
Configuring the Switch for Secure Socket Layer HTTP
8-37Understanding Secure HTTP Servers and Clients 8-37
Certificate Authority Trustpoints 8-38CipherSuites 8-39
Configuring Secure HTTP Servers and Clients 8-40Default SSL
Configuration 8-40SSL Configuration Guidelines 8-40Configuring a CA
Trustpoint 8-40Configuring the Secure HTTP Server 8-41Configuring
the Secure HTTP Client 8-43
Displaying Secure HTTP Server and Client Status 8-44
Configuring the Switch for Secure Copy Protocol 8-44Information
About Secure Copy 8-44
C H A P T E R 9 Configuring IEEE 802.1x Port-Based
Authentication 9-1
Understanding IEEE 802.1x Port-Based Authentication 9-1Device
Roles 9-3ixCatalyst 2960 Switch Software Configuration Guide
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Authentication Initiation and Message Exchange 9-6Authentication
Manager 9-8
Port-Based Authentication Methods 9-8Per-User ACLs and
Filter-Ids 9-9Authentication Manager CLI Commands 9-9
Ports in Authorized and Unauthorized States 9-10802.1x Host Mode
9-11Multidomain Authentication 9-12802.1x Multiple Authentication
Mode 9-13802.1x Accounting 9-13802.1x Accounting Attribute-Value
Pairs 9-14802.1x Readiness Check 9-15802.1x Authentication with
VLAN Assignment 9-15802.1x Authentication with Downloadable ACLs
and Redirect URLs 9-17
Cisco Secure ACS and Attribute-Value Pairs for the Redirect URL
9-17Cisco Secure ACS and Attribute-Value Pairs for Downloadable
ACLs 9-18
802.1x Authentication with Guest VLAN 9-18802.1x Authentication
with Restricted VLAN 9-19802.1x Authentication with Inaccessible
Authentication Bypass 9-20802.1x Authentication with Voice VLAN
Ports 9-21802.1x Authentication with Port Security 9-22802.1x
Authentication with Wake-on-LAN 9-23802.1x Authentication with MAC
Authentication Bypass 9-24Network Admission Control Layer 2 802.1x
Validation 9-25Flexible Authentication Ordering 9-25Open1x
Authentication 9-25Using Voice Aware 802.1x Security 9-26802.1x
Switch Supplicant with Network Edge Access Topology (NEAT) 9-26Web
Authentication 9-27
Web Authentication with Automatic MAC Check 9-28Local Web
Authentication Banner 9-28
Using IEEE 802.1x Authentication with ACLs and the RADIUS
Filter-Id Attribute 9-30
Configuring 802.1x Authentication 9-31Default 802.1x
Authentication Configuration 9-32802.1x Authentication
Configuration Guidelines 9-33
802.1x Authentication 9-33VLAN Assignment, Guest VLAN,
Restricted VLAN, and Inaccessible Authentication Bypass 9-34MAC
Authentication Bypass 9-35xCatalyst 2960 Switch Software
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Maximum Number of Allowed Devices Per Port 9-35
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Configuring 802.1x Readiness Check 9-35Configuring Voice Aware
802.1x Security 9-36Configuring 802.1x Violation Modes
9-37Configuring 802.1x Authentication 9-38Configuring the
Switch-to-RADIUS-Server Communication 9-40Configuring the Host Mode
9-41Configuring Periodic Re-Authentication 9-42Manually
Re-Authenticating a Client Connected to a Port 9-43Changing the
Quiet Period 9-44Changing the Switch-to-Client Retransmission Time
9-44Setting the Switch-to-Client Frame-Retransmission Number
9-45Setting the Re-Authentication Number 9-46Configuring 802.1x
Accounting 9-46Configuring a Guest VLAN 9-47Configuring a
Restricted VLAN 9-48Configuring the Inaccessible Authentication
Bypass Feature 9-50Configuring 802.1x Authentication with WoL
9-53Configuring MAC Authentication Bypass 9-54Configuring NAC Layer
2 802.1x Validation 9-55Configuring 802.1x Switch Supplicant with
NEAT 9-56Configuring 802.1x Authentication with Downloadable ACLs
and Redirect URLs 9-58
Configuring Downloadable ACLs 9-58Configuring a Downloadable
Policy 9-59
Configuring Flexible Authentication Ordering 9-60Configuring
Open1x 9-61Configuring Web Authentication 9-62Configuring a Web
Authentication Local Banner 9-64Disabling 802.1x Authentication on
the Port 9-65Resetting the 802.1x Authentication Configuration to
the Default Values 9-66
Displaying 802.1x Statistics and Status 9-66
C H A P T E R 10 Configuring Interface Characteristics 10-1
Understanding Interface Types 10-1Port-Based VLANs 10-2Switch
Ports 10-2
Access Ports 10-2Trunk Ports 10-3
EtherChannel Port Groups 10-3Dual-Purpose Uplink Ports
10-4xiCatalyst 2960 Switch Software Configuration Guide
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Power over Ethernet Ports 10-4Supported Protocols and Standards
10-4Powered-Device Detection and Initial Power Allocation 10-5Power
Management Modes 10-6Power Monitoring and Power Policing 10-7
Connecting Interfaces 10-9
Using Interface Configuration Mode 10-9Procedures for
Configuring Interfaces 10-10Configuring a Range of Interfaces
10-10Configuring and Using Interface Range Macros 10-12
Configuring Ethernet Interfaces 10-14Default Ethernet Interface
Configuration 10-14Setting the Type of a Dual-Purpose Uplink Port
10-15Configuring Interface Speed and Duplex Mode 10-17
Speed and Duplex Configuration Guidelines 10-17Setting the
Interface Speed and Duplex Parameters 10-18
Configuring IEEE 802.3x Flow Control 10-19Configuring Auto-MDIX
on an Interface 10-20Configuring a Power Management Mode on a PoE
Port 10-21Budgeting Power for Devices Connected to a PoE Port
10-22Configuring Power Policing 10-23Adding a Description for an
Interface 10-24
Configuring the System MTU 10-25
Monitoring and Maintaining the Interfaces 10-26Monitoring
Interface Status 10-26Clearing and Resetting Interfaces and
Counters 10-27Shutting Down and Restarting the Interface 10-28
C H A P T E R 11 Configuring Auto Smartports Macros 11-1
Understanding Auto Smartports and Static Smartports Macros
11-1
Configuring Auto Smartports 11-2Default Auto Smartports
Configuration 11-2Auto Smartports Configuration Guidelines
11-3Enabling Auto Smartports 11-3Configuring Auto Smartports
Built-in Macros 11-4Configuring Event Triggers 11-6Configuring Auto
Smartports User-Defined Macros 11-9xiiCatalyst 2960 Switch Software
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Configuring Static Smartports Macros 11-11Default Static
Smartports Configuration 11-11Static Smartports Configuration
Guidelines 11-12Applying Static Smartports Macros 11-12
Displaying Auto Smartports and Static Smartports Macros
11-14
C H A P T E R 12 Configuring VLANs 12-1
Understanding VLANs 12-1Supported VLANs 12-2VLAN Port Membership
Modes 12-3
Configuring Normal-Range VLANs 12-4Token Ring VLANs
12-5Normal-Range VLAN Configuration Guidelines 12-5VLAN
Configuration Mode Options 12-6
VLAN Configuration in config-vlan Mode 12-6VLAN Configuration in
VLAN Database Configuration Mode 12-6
Saving VLAN Configuration 12-7Default Ethernet VLAN
Configuration 12-7Creating or Modifying an Ethernet VLAN
12-8Deleting a VLAN 12-10Assigning Static-Access Ports to a VLAN
12-10
Configuring Extended-Range VLANs 12-11Default VLAN Configuration
12-12Extended-Range VLAN Configuration Guidelines 12-12Creating an
Extended-Range VLAN 12-13
Displaying VLANs 12-14
Configuring VLAN Trunks 12-14Trunking Overview 12-14
IEEE 802.1Q Configuration Considerations 12-15Default Layer 2
Ethernet Interface VLAN Configuration 12-16Configuring an Ethernet
Interface as a Trunk Port 12-16
Interaction with Other Features 12-16Configuring a Trunk Port
12-17Defining the Allowed VLANs on a Trunk 12-18Changing the
Pruning-Eligible List 12-19Configuring the Native VLAN for Untagged
Traffic 12-19
Configuring Trunk Ports for Load Sharing 12-20Load Sharing Using
STP Port Priorities 12-20xiiiCatalyst 2960 Switch Software
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Configuring VMPS 12-23Understanding VMPS 12-24
Dynamic-Access Port VLAN Membership 12-24Default VMPS Client
Configuration 12-25VMPS Configuration Guidelines 12-25Configuring
the VMPS Client 12-25
Entering the IP Address of the VMPS 12-26Configuring
Dynamic-Access Ports on VMPS Clients 12-26Reconfirming VLAN
Memberships 12-27Changing the Reconfirmation Interval 12-27Changing
the Retry Count 12-28
Monitoring the VMPS 12-28Troubleshooting Dynamic-Access Port
VLAN Membership 12-29VMPS Configuration Example 12-29
C H A P T E R 13 Configuring VTP 13-1
Understanding VTP 13-1The VTP Domain 13-2VTP Modes 13-3VTP
Advertisements 13-3VTP Version 2 13-4VTP Pruning 13-4
Configuring VTP 13-6Default VTP Configuration 13-6VTP
Configuration Options 13-7
VTP Configuration in Global Configuration Mode 13-7VTP
Configuration in VLAN Database Configuration Mode 13-7
VTP Configuration Guidelines 13-8Domain Names 13-8Passwords
13-8VTP Version 13-8Configuration Requirements 13-9
Configuring a VTP Server 13-9Configuring a VTP Client
13-11Disabling VTP (VTP Transparent Mode) 13-12Enabling VTP Version
2 13-13Enabling VTP Pruning 13-14Adding a VTP Client Switch to a
VTP Domain 13-14xivCatalyst 2960 Switch Software Configuration
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Monitoring VTP 13-16
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C H A P T E R 14 Configuring Voice VLAN 14-1
Understanding Voice VLAN 14-1Cisco IP Phone Voice Traffic
14-2Cisco IP Phone Data Traffic 14-2
Configuring Voice VLAN 14-3Default Voice VLAN Configuration
14-3Voice VLAN Configuration Guidelines 14-3Configuring a Port
Connected to a Cisco 7960 IP Phone 14-4
Configuring Cisco IP Phone Voice Traffic 14-5Configuring the
Priority of Incoming Data Frames 14-6
Displaying Voice VLAN 14-7
C H A P T E R 15 Configuring STP 15-1
Understanding Spanning-Tree Features 15-1STP Overview
15-2Spanning-Tree Topology and BPDUs 15-3Bridge ID, Switch
Priority, and Extended System ID 15-4Spanning-Tree Interface States
15-4
Blocking State 15-5Listening State 15-6Learning State
15-6Forwarding State 15-6Disabled State 15-7
How a Switch or Port Becomes the Root Switch or Root Port
15-7Spanning Tree and Redundant Connectivity 15-8Spanning-Tree
Address Management 15-8Accelerated Aging to Retain Connectivity
15-8Spanning-Tree Modes and Protocols 15-9Supported Spanning-Tree
Instances 15-9Spanning-Tree Interoperability and Backward
Compatibility 15-10STP and IEEE 802.1Q Trunks 15-10
Configuring Spanning-Tree Features 15-10Default Spanning-Tree
Configuration 15-11Spanning-Tree Configuration Guidelines
15-12Changing the Spanning-Tree Mode. 15-13Disabling Spanning Tree
15-14Configuring the Root Switch 15-14Configuring a Secondary Root
Switch 15-16xvCatalyst 2960 Switch Software Configuration Guide
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Configuring Path Cost 15-18Configuring the Switch Priority of a
VLAN 15-19Configuring Spanning-Tree Timers 15-20
Configuring the Hello Time 15-20Configuring the Forwarding-Delay
Time for a VLAN 15-21Configuring the Maximum-Aging Time for a VLAN
15-21Configuring the Transmit Hold-Count 15-22
Displaying the Spanning-Tree Status 15-22
C H A P T E R 16 Configuring MSTP 16-1
Understanding MSTP 16-2Multiple Spanning-Tree Regions 16-2IST,
CIST, and CST 16-2
Operations Within an MST Region 16-3Operations Between MST
Regions 16-3IEEE 802.1s Terminology 16-5
Hop Count 16-5Boundary Ports 16-6IEEE 802.1s Implementation
16-6
Port Role Naming Change 16-6Interoperation Between Legacy and
Standard Switches 16-7Detecting Unidirectional Link Failure
16-7
Interoperability with IEEE 802.1D STP 16-8
Understanding RSTP 16-8Port Roles and the Active Topology
16-9Rapid Convergence 16-9Synchronization of Port Roles 16-11Bridge
Protocol Data Unit Format and Processing 16-12
Processing Superior BPDU Information 16-12Processing Inferior
BPDU Information 16-13
Topology Changes 16-13
Configuring MSTP Features 16-13Default MSTP Configuration
16-14MSTP Configuration Guidelines 16-14Specifying the MST Region
Configuration and Enabling MSTP 16-15Configuring the Root Switch
16-17Configuring a Secondary Root Switch 16-18Configuring Port
Priority 16-19xviCatalyst 2960 Switch Software Configuration
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Configuring Path Cost 16-20
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Configuring the Switch Priority 16-21Configuring the Hello Time
16-22Configuring the Forwarding-Delay Time 16-23Configuring the
Maximum-Aging Time 16-23Configuring the Maximum-Hop Count
16-24Specifying the Link Type to Ensure Rapid Transitions
16-24Designating the Neighbor Type 16-25Restarting the Protocol
Migration Process 16-25
Displaying the MST Configuration and Status 16-26
C H A P T E R 17 Configuring Optional Spanning-Tree Features
17-1
Understanding Optional Spanning-Tree Features 17-1Understanding
Port Fast 17-2Understanding BPDU Guard 17-2Understanding BPDU
Filtering 17-3Understanding UplinkFast 17-3Understanding
BackboneFast 17-5Understanding EtherChannel Guard 17-7Understanding
Root Guard 17-8Understanding Loop Guard 17-9
Configuring Optional Spanning-Tree Features 17-9Default Optional
Spanning-Tree Configuration 17-9Optional Spanning-Tree
Configuration Guidelines 17-10Enabling Port Fast 17-10Enabling BPDU
Guard 17-11Enabling BPDU Filtering 17-12Enabling UplinkFast for Use
with Redundant Links 17-13Enabling BackboneFast 17-13Enabling
EtherChannel Guard 17-14Enabling Root Guard 17-15Enabling Loop
Guard 17-15
Displaying the Spanning-Tree Status 17-16
C H A P T E R 18 Configuring Flex Links and the MAC
Address-Table Move Update Feature 18-1
Understanding Flex Links and the MAC Address-Table Move Update
18-1Flex Links 18-2VLAN Flex Link Load Balancing and Support
18-2xviiCatalyst 2960 Switch Software Configuration Guide
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Flex Link Multicast Fast Convergence 18-3Learning the Other Flex
Link Port as the mrouter Port 18-3Generating IGMP Reports
18-4Leaking IGMP Reports 18-4Configuration Examples 18-4
MAC Address-Table Move Update 18-6
Configuring Flex Links and the MAC Address-Table Move Update
18-7Default Configuration 18-8Configuration Guidelines
18-8Configuring Flex Links 18-9Configuring VLAN Load Balancing on
Flex Links 18-11Configuring the MAC Address-Table Move Update
Feature 18-12
Monitoring Flex Links and the MAC Address-Table Move Update
18-14
C H A P T E R 19 Configuring DHCP Features and IP Source Guard
19-1
Understanding DHCP Snooping 19-1DHCP Server 19-2DHCP Relay Agent
19-2DHCP Snooping 19-2Option-82 Data Insertion 19-3DHCP Snooping
Binding Database 19-5
Configuring DHCP Snooping 19-7Default DHCP Snooping
Configuration 19-7DHCP Snooping Configuration Guidelines
19-7Configuring the DHCP Relay Agent 19-9Enabling DHCP Snooping and
Option 82 19-9Enabling the Cisco IOS DHCP Server Database
19-10Enabling the DHCP Snooping Binding Database Agent 19-11
Displaying DHCP Snooping Information 19-12
Understanding IP Source Guard 19-12Source IP Address Filtering
19-13Source IP and MAC Address Filtering 19-13
Configuring IP Source Guard 19-13Default IP Source Guard
Configuration 19-13IP Source Guard Configuration Guidelines
19-14Enabling IP Source Guard 19-14
Displaying IP Source Guard Information 19-16
Understanding DHCP Server Port-Based Address Allocation
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Configuring DHCP Server Port-Based Address Allocation
19-16Default Port-Based Address Allocation Configuration
19-16Port-Based Address Allocation Configuration Guidelines
19-17Enabling DHCP Server Port-Based Address Allocation 19-17
Displaying DHCP Server Port-Based Address Allocation 19-19
C H A P T E R 20 Configuring Dynamic ARP Inspection 20-1
Understanding Dynamic ARP Inspection 20-1Interface Trust States
and Network Security 20-3Rate Limiting of ARP Packets 20-4Relative
Priority of ARP ACLs and DHCP Snooping Entries 20-4Logging of
Dropped Packets 20-4
Configuring Dynamic ARP Inspection 20-5Default Dynamic ARP
Inspection Configuration 20-5Dynamic ARP Inspection Configuration
Guidelines 20-6Configuring Dynamic ARP Inspection in DHCP
Environments 20-7Configuring ARP ACLs for Non-DHCP Environments
20-8Limiting the Rate of Incoming ARP Packets 20-10Performing
Validation Checks 20-11Configuring the Log Buffer 20-12
Displaying Dynamic ARP Inspection Information 20-14
C H A P T E R 21 Configuring IGMP Snooping and MVR 21-1
Understanding IGMP Snooping 21-1IGMP Versions 21-2Joining a
Multicast Group 21-3Leaving a Multicast Group 21-5Immediate Leave
21-5IGMP Configurable-Leave Timer 21-5IGMP Report Suppression
21-5
Configuring IGMP Snooping 21-6Default IGMP Snooping
Configuration 21-6Enabling or Disabling IGMP Snooping 21-7Setting
the Snooping Method 21-8Configuring a Multicast Router Port
21-9Configuring a Host Statically to Join a Group 21-9Enabling IGMP
Immediate Leave 21-10Configuring the IGMP Leave Timer
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Configuring TCN-Related Commands 21-11Controlling the Multicast
Flooding Time After a TCN Event 21-11Recovering from Flood Mode
21-12Disabling Multicast Flooding During a TCN Event 21-12
Configuring the IGMP Snooping Querier 21-13Disabling IGMP Report
Suppression 21-14
Displaying IGMP Snooping Information 21-15
Understanding Multicast VLAN Registration 21-16Using MVR in a
Multicast Television Application 21-17
Configuring MVR 21-19Default MVR Configuration 21-19MVR
Configuration Guidelines and Limitations 21-19Configuring MVR
Global Parameters 21-20Configuring MVR Interfaces 21-21
Displaying MVR Information 21-23
Configuring IGMP Filtering and Throttling 21-23Default IGMP
Filtering and Throttling Configuration 21-24Configuring IGMP
Profiles 21-24Applying IGMP Profiles 21-25Setting the Maximum
Number of IGMP Groups 21-26Configuring the IGMP Throttling Action
21-27
Displaying IGMP Filtering and Throttling Configuration 21-28
C H A P T E R 22 Configuring Port-Based Traffic Control 22-1
Configuring Storm Control 22-1Understanding Storm Control
22-1Default Storm Control Configuration 22-3Configuring Storm
Control and Threshold Levels 22-3Configuring Small-Frame Arrival
Rate 22-5
Configuring Protected Ports 22-6Default Protected Port
Configuration 22-6Protected Port Configuration Guidelines
22-7Configuring a Protected Port 22-7
Configuring Port Blocking 22-7Default Port Blocking
Configuration 22-7Blocking Flooded Traffic on an Interface
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Configuring Port Security 22-8Understanding Port Security
22-9
Secure MAC Addresses 22-9Security Violations 22-10
Default Port Security Configuration 22-11Port Security
Configuration Guidelines 22-11Enabling and Configuring Port
Security 22-12Enabling and Configuring Port Security Aging
22-17
Displaying Port-Based Traffic Control Settings 22-18
C H A P T E R 23 Configuring CDP 23-1
Understanding CDP 23-1
Configuring CDP 23-2Default CDP Configuration 23-2Configuring
the CDP Characteristics 23-2Disabling and Enabling CDP
23-3Disabling and Enabling CDP on an Interface 23-4
Monitoring and Maintaining CDP 23-4
C H A P T E R 24 Configuring LLDP, LLDP-MED, and Wired Location
Service 24-1
Understanding LLDP, LLDP-MED, and Wired Location Service
24-1LLDP 24-1LLDP-MED 24-2Wired Location Service 24-3
Configuring LLDP, LLDP-MED, and Wired Location Service
24-4Default LLDP Configuration 24-4Configuration Guidelines
24-5Enabling LLDP 24-5Configuring LLDP Characteristics
24-6Configuring LLDP-MED TLVs 24-6Configuring Network-Policy TLV
24-7Configuring Location TLV and Wired Location Service 24-9
Monitoring and Maintaining LLDP, LLDP-MED, and Wired Location
Service 24-10
C H A P T E R 25 Configuring UDLD 25-1
Understanding UDLD 25-1Modes of Operation 25-1Methods to Detect
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Configuring UDLD 25-3Default UDLD Configuration
25-4Configuration Guidelines 25-4Enabling UDLD Globally
25-5Enabling UDLD on an Interface 25-5Resetting an Interface
Disabled by UDLD 25-6
Displaying UDLD Status 25-6
C H A P T E R 26 Configuring SPAN and RSPAN 26-1
Understanding SPAN and RSPAN 26-1Local SPAN 26-2Remote SPAN
26-2SPAN and RSPAN Concepts and Terminology 26-3
SPAN Sessions 26-3Monitored Traffic 26-4Source Ports 26-5Source
VLANs 26-6VLAN Filtering 26-6Destination Port 26-6RSPAN VLAN
26-7
SPAN and RSPAN Interaction with Other Features 26-8
Configuring SPAN and RSPAN 26-9Default SPAN and RSPAN
Configuration 26-9Configuring Local SPAN 26-9
SPAN Configuration Guidelines 26-10Creating a Local SPAN Session
26-10Creating a Local SPAN Session and Configuring Incoming Traffic
26-13Specifying VLANs to Filter 26-15
Configuring RSPAN 26-16RSPAN Configuration Guidelines
26-16Configuring a VLAN as an RSPAN VLAN 26-17Creating an RSPAN
Source Session 26-18Creating an RSPAN Destination Session
26-19Creating an RSPAN Destination Session and Configuring Incoming
Traffic 26-20Specifying VLANs to Filter 26-22
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C H A P T E R 27 Configuring RMON 27-1
Understanding RMON 27-1
Configuring RMON 27-2Default RMON Configuration 27-3Configuring
RMON Alarms and Events 27-3Collecting Group History Statistics on
an Interface 27-5Collecting Group Ethernet Statistics on an
Interface 27-5
Displaying RMON Status 27-6
C H A P T E R 28 Configuring System Message Logging 28-1
Understanding System Message Logging 28-1
Configuring System Message Logging 28-2System Log Message Format
28-2Default System Message Logging Configuration 28-3Disabling
Message Logging 28-4Setting the Message Display Destination Device
28-5Synchronizing Log Messages 28-6Enabling and Disabling Time
Stamps on Log Messages 28-7Enabling and Disabling Sequence Numbers
in Log Messages 28-8Defining the Message Severity Level
28-8Limiting Syslog Messages Sent to the History Table and to SNMP
28-10Enabling the Configuration-Change Logger 28-10Configuring UNIX
Syslog Servers 28-12
Logging Messages to a UNIX Syslog Daemon 28-12Configuring the
UNIX System Logging Facility 28-12
Displaying the Logging Configuration 28-13
C H A P T E R 29 Configuring SNMP 29-1
Understanding SNMP 29-1SNMP Versions 29-2SNMP Manager Functions
29-3SNMP Agent Functions 29-3SNMP Community Strings 29-4Using SNMP
to Access MIB Variables 29-4SNMP Notifications 29-5SNMP ifIndex MIB
Object Values 29-5xxiiiCatalyst 2960 Switch Software Configuration
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Configuring SNMP 29-6Default SNMP Configuration 29-6SNMP
Configuration Guidelines 29-6Disabling the SNMP Agent
29-7Configuring Community Strings 29-8Configuring SNMP Groups and
Users 29-9Configuring SNMP Notifications 29-11Setting the CPU
Threshold Notification Types and Values 29-15Setting the Agent
Contact and Location Information 29-16Limiting TFTP Servers Used
Through SNMP 29-16SNMP Examples 29-17
Displaying SNMP Status 29-18
C H A P T E R 30 Configuring Network Security with ACLs
30-19
Understanding ACLs 30-19Port ACLs 30-20Handling Fragmented and
Unfragmented Traffic 30-21
Configuring IPv4 ACLs 30-22Creating Standard and Extended IPv4
ACLs 30-23
Access List Numbers 30-24Creating a Numbered Standard ACL
30-25Creating a Numbered Extended ACL 30-26Resequencing ACEs in an
ACL 30-30Creating Named Standard and Extended ACLs 30-30Using Time
Ranges with ACLs 30-32Including Comments in ACLs 30-33
Applying an IPv4 ACL to a Terminal Line 30-34Applying an IPv4
ACL to an Interface 30-34Hardware and Software Treatment of IP ACLs
30-35Troubleshooting ACLs 30-35IPv4 ACL Configuration Examples
30-36
Numbered ACLs 30-37Extended ACLs 30-37Named ACLs 30-37Time Range
Applied to an IP ACL 30-38Commented IP ACL Entries 30-38
Creating Named MAC Extended ACLs 30-38Applying a MAC ACL to a
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C H A P T E R 31 Configuring Cisco IOS IP SLAs Operations
31-1
Understanding Cisco IOS IP SLAs 31-1Using Cisco IOS IP SLAs to
Measure Network Performance 31-3IP SLAs Responder and IP SLAs
Control Protocol 31-4Response Time Computation for IP SLAs 31-4
Configuring IP SLAs Operations 31-5Default Configuration
31-5Configuration Guidelines 31-5Configuring the IP SLAs Responder
31-6
Monitoring IP SLAs Operations 31-6
C H A P T E R 32 Configuring QoS 32-1
Understanding QoS 32-2Basic QoS Model 32-3Classification
32-5
Classification Based on QoS ACLs 32-7Classification Based on
Class Maps and Policy Maps 32-7
Policing and Marking 32-8Policing on Physical Ports 32-9
Mapping Tables 32-10Queueing and Scheduling Overview 32-11
Weighted Tail Drop 32-12SRR Shaping and Sharing 32-12Queueing
and Scheduling on Ingress Queues 32-13Queueing and Scheduling on
Egress Queues 32-15
Packet Modification 32-18
Configuring Auto-QoS 32-19Generated Auto-QoS Configuration
32-19Effects of Auto-QoS on the Configuration 32-24Auto-QoS
Configuration Guidelines 32-24Enabling Auto-QoS for VoIP
32-25Auto-QoS Configuration Example 32-27
Displaying Auto-QoS Information 32-28
Configuring Standard QoS 32-29Default Standard QoS Configuration
32-29
Default Ingress Queue Configuration 32-30Default Egress Queue
Configuration 32-30Default Mapping Table Configuration
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Standard QoS Configuration Guidelines 32-32QoS ACL Guidelines
32-32Policing Guidelines 32-32General QoS Guidelines 32-33
A switchEnabling QoS Globally 32-33Configuring Classification
Using Port Trust States 32-33
Configuring the Trust State on Ports within the QoS Domain
32-34Configuring the CoS Value for an Interface 32-35Configuring a
Trusted Boundary to Ensure Port Security 32-36Enabling DSCP
Transparency Mode 32-37Configuring the DSCP Trust State on a Port
Bordering Another QoS Domain 32-38
Configuring a QoS Policy 32-40Classifying Traffic by Using ACLs
32-41Classifying Traffic by Using Class Maps 32-44Classifying,
Policing, and Marking Traffic on Physical Ports by Using Policy
Maps 32-46Classifying, Policing, and Marking Traffic by Using
Aggregate Policers 32-49
Configuring DSCP Maps 32-51Configuring the CoS-to-DSCP Map
32-52Configuring the IP-Precedence-to-DSCP Map 32-53Configuring the
Policed-DSCP Map 32-54Configuring the DSCP-to-CoS Map
32-55Configuring the DSCP-to-DSCP-Mutation Map 32-56
Configuring Ingress Queue Characteristics 32-57Mapping DSCP or
CoS Values to an Ingress Queue and Setting WTD Thresholds
32-58Allocating Buffer Space Between the Ingress Queues
32-59Allocating Bandwidth Between the Ingress Queues
32-60Configuring the Ingress Priority Queue 32-61
Configuring Egress Queue Characteristics 32-62Configuration
Guidelines 32-62Allocating Buffer Space to and Setting WTD
Thresholds for an Egress Queue-Set 32-62Mapping DSCP or CoS Values
to an Egress Queue and to a Threshold ID 32-65Configuring SRR
Shaped Weights on Egress Queues 32-66Configuring SRR Shared Weights
on Egress Queues 32-67Configuring the Egress Expedite Queue
32-68Limiting the Bandwidth on an Egress Interface 32-68
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C H A P T E R 33 Configuring IPv6 Host Functions 33-1
Understanding IPv6 33-1IPv6 Addresses 33-2Supported IPv6 Host
Features 33-2
128-Bit Wide Unicast Addresses 33-3DNS for IPv6 33-3ICMPv6
33-3Neighbor Discovery 33-3Default Router Preference 33-4IPv6
Stateless Autoconfiguration and Duplicate Address Detection
33-4IPv6 Applications 33-4Dual IPv4 and IPv6 Protocol Stacks
33-5Static Routes for IPv6 33-5SNMP and Syslog Over IPv6
33-5HTTP(S) Over IPv6 33-6
Configuring IPv6 33-6Default IPv6 Configuration 33-7Configuring
IPv6 Addressing and Enabling IPv6 Host 33-7Configuring Default
Router Preference 33-9Configuring IPv6 ICMP Rate Limiting
33-9Configuring Static Routes for IPv6 33-11
Displaying IPv6 33-12
C H A P T E R 34 Configuring IPv6 MLD Snooping 34-1
Understanding MLD Snooping 34-1MLD Messages 34-2MLD Queries
34-3Multicast Client Aging Robustness 34-3Multicast Router
Discovery 34-3MLD Reports 34-4MLD Done Messages and Immediate-Leave
34-4Topology Change Notification Processing 34-5
Configuring IPv6 MLD Snooping 34-5Default MLD Snooping
Configuration 34-5MLD Snooping Configuration Guidelines
34-6Enabling or Disabling MLD Snooping 34-6Configuring a Static
Multicast Group 34-7Configuring a Multicast Router Port
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Configuring MLD Snooping Queries 34-9Disabling MLD Listener
Message Suppression 34-10
Displaying MLD Snooping Information 34-11
C H A P T E R 35 Configuring EtherChannels and Link-State
Tracking 35-1
Understanding EtherChannels 35-1EtherChannel Overview
35-2Port-Channel Interfaces 35-3Port Aggregation Protocol 35-4
PAgP Modes 35-4PAgP Interaction with Virtual Switches and
Dual-Active Detection 35-5PAgP Interaction with Other Features
35-5
Link Aggregation Control Protocol 35-5LACP Modes 35-6LACP
Interaction with Other Features 35-6
EtherChannel On Mode 35-6Load Balancing and Forwarding Methods
35-7
Configuring EtherChannels 35-8Default EtherChannel Configuration
35-9EtherChannel Configuration Guidelines 35-9Configuring Layer 2
EtherChannels 35-10Configuring EtherChannel Load Balancing
35-13Configuring the PAgP Learn Method and Priority
35-14Configuring LACP Hot-Standby Ports 35-15
Configuring the LACP System Priority 35-16Configuring the LACP
Port Priority 35-16
Displaying EtherChannel, PAgP, and LACP Status 35-17
Understanding Link-State Tracking 35-18
Configuring Link-State Tracking 35-20Default Link-State Tracking
Configuration 35-21Link-State Tracking Configuration Guidelines
35-21Configuring Link-State Tracking 35-21Displaying Link-State
Tracking Status 35-22
C H A P T E R 36 Troubleshooting 36-1
Recovering from a Software Failure 36-2
Recovering from a Lost or Forgotten Password 36-3Procedure with
Password Recovery Enabled 36-4xxviiiCatalyst 2960 Switch Software
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Recovering from a Command Switch Failure 36-7Replacing a Failed
Command Switch with a Cluster Member 36-8Replacing a Failed Command
Switch with Another Switch 36-9
Recovering from Lost Cluster Member Connectivity 36-11
Preventing Autonegotiation Mismatches 36-11
Troubleshooting Power over Ethernet Switch Ports 36-11Disabled
Port Caused by Power Loss 36-11Disabled Port Caused by False Link
Up 36-12
SFP Module Security and Identification 36-12
Monitoring SFP Module Status 36-13
Using Ping 36-13Understanding Ping 36-13Executing Ping 36-13
Using Layer 2 Traceroute 36-14Understanding Layer 2 Traceroute
36-14Usage Guidelines 36-15Displaying the Physical Path 36-16
Using IP Traceroute 36-16Understanding IP Traceroute
36-16Executing IP Traceroute 36-17
Using TDR 36-18Understanding TDR 36-18Running TDR and Displaying
the Results 36-18
Using Debug Commands 36-18Enabling Debugging on a Specific
Feature 36-19Enabling All-System Diagnostics 36-19Redirecting Debug
and Error Message Output 36-20
Using the show platform forward Command 36-20
Using the crashinfo Files 36-22Basic crashinfo Files
36-22Extended crashinfo Files 36-22
Troubleshooting Tables 36-22Troubleshooting CPU Utilization
36-23
Possible Symptoms of High CPU Utilization 36-23Verifying the
Problem and Cause 36-23
Troubleshooting Power over Ethernet (PoE) 36-24Troubleshooting
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A P P E N D I X A Supported MIBs A-1
MIB List A-1
Using FTP to Access the MIB Files A-3
A P P E N D I X B Working with the Cisco IOS File System,
Configuration Files, and Software Images B-1
Working with the Flash File System B-1Displaying Available File
Systems B-2Setting the Default File System B-3Displaying
Information about Files on a File System B-3Changing Directories
and Displaying the Working Directory B-4Creating and Removing
Directories B-4Copying Files B-5Deleting Files B-5Creating,
Displaying, and Extracting tar Files B-6
Creating a tar File B-6Displaying the Contents of a tar File
B-7Extracting a tar File B-7
Displaying the Contents of a File B-8
Working with Configuration Files B-8Guidelines for Creating and
Using Configuration Files B-9Configuration File Types and Location
n B-10Creating a Configuration File By Using a Text Editor
B-10Copying Configuration Files By Using TFTP B-10
Preparing to Download or Upload a Configuration File B y Using
TFTP B-10Downloading the Configuration File By Using TFTP
B-11Uploading the Configuration File By Using TFTP B-12
Copying Configuration Files By Using FTP B-12Preparing to
Download or Upload a Configuration File By Using FTP
B-13Downloading a Configuration File By Using FTP B-13Uploading a
Configuration File By Using FTP B-14
Copying Configuration Files By Using RCP B-15Preparing to
Download or Upload a Configuration File By Using RCP
B-16Downloading a Configuration File By Using RCP B-17Uploading a
Configuration File By Using RCP B-18
Clearing Configuration Information B-18Clearing the Startup
Configuration File B-19Deleting a Stored Configuration File
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Replacing and Rolling Back Configurations B-19Understanding
Configuration Replacement and Rollback B-19Configuration Guidelines
B-21Configuring the Configuration Archive B-21Performing a
Configuration Replacement or Rollback Operation B-22
Working with Software Images B-23Image Location on the Switch
B-24tar File Format of Images on a Server or Cisco.com B-24Copying
Image Files By Using TFTP B-25
Preparing to Download or Upload an Image File By Using TFTP
B-25Downloading an Image File By Using TFTP B-26Uploading an Image
File By Using TFTP B-28
Copying Image Files By Using FTP B-28Preparing to Download or
Upload an Image File By Using FTP B-29Downloading an Image File By
Using FTP B-30Uploading an Image File By Using FTP B-31
Copying Image Files By Using RCP B-32Preparing to Download or
Upload an Image File By Using RCP B-33Downloading an Image File By
Using RCP B-34Uploading an Image File By Using RCP B-36
A P P E N D I X C Recommendations for Upgrading a Catalyst 2950
Switch to a Catalyst 2960 Switch C-1
Configuration Compatibility Issues C-1
Feature Behavior Incompatibilities C-5
A P P E N D I X D Unsupported Commands in Cisco IOS Release
12.2(50)SE D-1
Access Control Lists D-1Unsupported Privileged EXEC Commands
D-1Unsupported Global Configuration Commands D-2Unsupported
Route-Map Configuration Commands D-2
Boot Loader Commands D-2Unsupported Global Configuration
Commands D-2
Debug Commands D-2Unsupported Privileged EXEC Commands D-2
|IGMP Snooping Commands D-2Unsupported Global Configuration
Commands D-2xxxiCatalyst 2960 Switch Software Configuration
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Interface Commands D-3Unsupported Privileged EXEC Commands
D-3Unsupported Global Configuration Commands D-3Unsupported
Interface Configuration Commands D-3
MAC Address Commands D-3Unsupported Privileged EXEC Commands
D-3Unsupported Global Configuration Commands D-3
Miscellaneous D-4Unsupported User EXEC Commands D-4Unsupported
Privileged EXEC Commands D-4Unsupported Global Configuration
Commands D-4
Network Address Translation (NAT) Commands D-4Unsupported
Privileged EXEC Commands D-4
QoS D-4Unsupported Global Configuration Command D-4Unsupported
Interface Configuration Commands D-5Unsupported Policy-Map
Configuration Command D-5
RADIUS D-5Unsupported Global Configuration Commands D-5
SNMP D-5Unsupported Global Configuration Commands D-5
SNMPv3 D-5Unsupported 3DES Encryption Commands D-5
Spanning Tree D-6Unsupported Global Configuration Command
D-6Unsupported Interface Configuration Command D-6
VLAN D-6Unsupported Global Configuration Command D-6Unsupported
vlan-config Command D-6Unsupported User EXEC Commands D-6
VTP D-6Unsupported Privileged EXEC Commands D-6
I N D E XxxxiiCatalyst 2960 Switch Software Configuration
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Preface
AudienceThis guide is for the networking professional managing
the Catalyst 2960 switch, hereafter referred to as the switch.
Before using this guide, you should have experience working with
the Cisco IOS software and be familiar with the concepts and
terminology of Ethernet and local area networking.
PurposeThis guide provides the information that you need to
configure Cisco IOS software features on your switch. The Catalyst
2960 software provides enterprise-class intelligent services such
as access control lists (ACLs) and quality of service (QoS)
features.This guide provides procedures for using the commands that
have been created or changed for use with the switch. It does not
provide detailed information about these commands. For detailed
information about these commands, see the Catalyst 2960 Switch
Command Reference for this release. For information about the
standard Cisco IOS Release 12.2 commands, see the Cisco IOS
documentation set available from the Cisco.com home page at
Documentation > Cisco IOS Software.This guide does not provide
detailed information on the graphical user interfaces (GUIs) for
the embedded device manager or for Cisco Network Assistant
(hereafter referred to as Network Assistant) that you can use to
manage the switch. However, the concepts in this guide are
applicable to the GUI user. For information about the device
manager, see the switch online help. For information about Network
Assistant, see Getting Started with Cisco Network Assistant,
available on Cisco.com.This guide does not describe system messages
you might encounter or how to install your switch. For more
information, see the Catalyst 2960 Switch System Message Guide for
this release and the Catalyst 2960 Switch Hardware Installation
Guide.For documentation updates, see the release notes for this
release.xxxiiiCatalyst 3750 Switch Software Configuration Guide
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ConventionsThis publication uses these conventions to convey
instructions and information:Command descriptions use these
conventions: Commands and keywords are in boldface text. Arguments
for which you supply values are in italic.
-
Preface Square brackets ([ ]) mean optional elements. Braces ({
}) group required choices, and vertical bars ( | ) separate the
alternative elements. Braces and vertical bars within square
brackets ([{ | }]) mean a required choice within an optional
element.Interactive examples use these conventions: Terminal
sessions and system displays are in screen font. Information you
enter is in boldface screen font. Nonprinting characters, such as
passwords or tabs, are in angle brackets (< >).Notes,
cautions, and timesavers use these conventions and symbols:
Note Means reader take note. Notes contain helpful suggestions
or references to materials not contained in this manual.
Caution Means reader be careful. In this situation, you might do
something that could result in equipment damage or loss of
data.
Related PublicationsThese documents provide complete information
about the switch and are available from this Cisco.com
site:http://www.cisco.com/en/US/products/ps6406/tsd_products_support_series_home.html
Note Before installing, configuring, or upgrading the switch,
see these documents: For initial configuration information, see the
Using Express Setup section in the getting started
guide or the Configuring the Switch with the CLI-Based Setup
Program appendix in the hardware installation guide.
For device manager requirements, see the System Requirements
section in the release notes (not orderable but available on
Cisco.com).
For Network Assistant requirements, see the Getting Started with
Cisco Network Assistant (not orderable but available on
Cisco.com).
For cluster requirements, see the Release Notes for Cisco
Network Assistant (not orderable but available on Cisco.com).
For upgrading information, see the Downloading Software section
in the release notes.
See these documents for other information about the switch:
Release Notes for the Catalyst 3750, 3560, 2970, and 2960 Switches
Catalyst 3750, 3560, 3550, 2975, 2975, 2970, and 2960 Switch System
Message Guide Catalyst 2960 Switch Software Configuration Guide
Catalyst 2960 Switch Command Reference xxxivCatalyst 3750 Switch
Software Configuration Guide
OL-8550-07
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Preface Device manager online help (available on the switch)
Catalyst 2960 Switch Hardware Installation Guide Catalyst 2960
Switch Getting Started Guide Regulatory Compliance and Safety
Information for the Catalyst 2960 Switch Getting Started with Cisco
Network Assistant Release Notes for Cisco Network Assistant Cisco
Small Form-Factor Pluggable Modules Installation Notes Cisco RPS
300 Redundant Power System Hardware Installation Guide Cisco RPS
675 Redundant Power System Hardware Installation Guide Cisco
Redundant Power System 2300 Hardware Installation Guide For more
information about the Network Admission Control (NAC) features, see
the Network
Admission Control Software Configuration Guide These
compatibility matrix documents are available from this Cisco.com
site:http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html
Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix
Cisco 100-Megabit Ethernet SFP Modules Compatibility Matrix Cisco
Small Form-Factor Pluggable Modules Compatibility Matrix
Compatibility Matrix for 1000BASE-T Small Form-Factor Pluggable
Modules
Obtaining Documentation, Obtaining Support, and Security
Guidelines
For information on obtaining documentation, submitting a service
request, and gathering additional information, see the monthly
Whats New in Cisco Product Documentation, which also lists all new
and revised Cisco technical documentation,
at:http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.htmlSubscribe
to the Whats New in Cisco Product Documentation as a Really Simple
Syndication (RSS) feed and set content to be delivered directly to
your desktop using a reader application. The RSS feeds are a free
service and Cisco currently supports RSS version 2.0. xxxvCatalyst
3750 Switch Software Configuration Guide
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PrefacexxxviCatalyst 3750 Switch Software Configuration
Guide
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OL-8550-07C H A P T E R
1Overview
This chapter provides these topics about the Catalyst 2960
switch software: Features, page 1-1
Default Settings After Initial Switch Configuration, page 1-13
Network Configuration Examples, page 1-16 Where to Go Next, page
1-21In this document, IP refers to IP Version 4 (IPv4) unless there
is a specific reference to IP Version 6 (IPv6).
FeaturesSome features described in this chapter are available
only on the cryptographic (supports encryption) version of the
software. You must obtain authorization to use this feature and to
download the cryptographic version of the software from Cisco.com.
For more information, see the release notes for this release.
Ease-of-Deployment and Ease-of-Use Features, page 1-2 Performance
Features, page 1-3 Management Options, page 1-4 Manageability
Features, page 1-5 (includes a feature requiring the cryptographic
version of the
software) Availability and Redundancy Features, page 1-6 VLAN
Features, page 1-7
Security Features, page 1-8 (includes a feature requiring the
cryptographic version of the software) QoS and CoS Features, page
1-11 Monitoring Features, page 1-131-1Catalyst 3750 Switch Software
Configuration Guide
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Chapter 1 OverviewFeaturesEase-of-Deployment and Ease-of-Use
Features Express Setup for quickly configuring a switch for the
first time with basic IP information, contact
information, switch and Telnet passwords, and Simple Network
Management Protocol (SNMP) information through a browser-based
program. For more information about Express Setup, see the getting
started guide.
User-defined and Cisco-default Smartports macros for creating
custom switch configurations for simplified deployment across the
network.
An embedded device manager GUI for configuring and monitoring a
single switch through a web browser. For information about
launching the device manager, see the getting started guide. For
more information about the device manager, see the switch online
help.
Cisco Network Assistant (hereafter referred to as Network
Assistant) for Managing communities, which are device groups like
clusters, except that they can contain
routers and access points and can be made more secure.
Simplifying and minimizing switch and switch cluster management
from anywhere in your
intranet. Accomplishing multiple configuration tasks from a
single graphical interface without needing
to remember command-line interface (CLI) commands to accomplish
specific tasks. Interactive guide mode that guides you in
configuring complex features such as VLANs, ACLs,
and quality of service (QoS).
Note If the switch is running the LAN Lite image, you can
configure ACLs, but you cannot attach them to interfaces or
VLANs.
Configuration wizards that prompt you to provide only the
minimum required information to configure complex features such as
QoS priorities for traffic, priority levels for data applications,
and security.
Downloading an image to a switch. Applying actions to multiple
ports and multiple switches at the same time, such as VLAN and
QoS settings, inventory and statistic reports, link- and
switch-level monitoring and troubleshooting, and multiple switch
software upgrades.
Viewing a topology of interconnected devices to identify
existing switch clusters and eligible switches that can join a
cluster and to identify link information between switches.
Monitoring real-time status of a switch or multiple switches
from the LEDs on the front-panel images. The system, redundant
power system (RPS), and port LED colors on the images are similar
to those used on the physical LEDs.
Note To use the RPS, the switch must be running the LAN Base
image.
Note The Network Assistant must be downloaded from
cisco.com/go/cna.1-2Catalyst 3750 Switch Software Configuration
Guide
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Chapter 1 OverviewFeatures Switch clustering technology for
Unified configuration, monitoring, authentication, and software
upgrade of multiple,
cluster-capable switches, regardless of their geographic
proximity and interconnection media, including Ethernet, Fast
Ethernet, Fast EtherChannel, small form-factor pluggable (SFP)
modules, Gigabit Ethernet, and Gigabit EtherChannel connections.
For a list of cluster-capable switches, see the release notes.
Automatic discovery of candidate switches and creation of
clusters of up to 16 switches that can be managed through a single
IP address.
Extended discovery of cluster candidates that are not directly
connected to the command switch. Auto Smartports Cisco-default and
user-defined macros for dynamic port configuration based on the
device type detected on the port.
Performance Features Cisco EnergyWise manages the energy usage
of power over Ethernet (PoE) entities. Autosensing of port speed
and autonegotiation of duplex mode on all switch ports for
optimizing
bandwidth Automatic-medium-dependent interface crossover
(auto-MDIX) capability on 10/100 and
10/100/1000 Mb/s interfaces and on 10/100/1000 BASE-TX SFP
module interfaces that enables the interface to automatically
detect the required cable connection type (straight-through or
crossover) and to configure the connection appropriately
Support for up to 9000 bytes for frames that are bridged in
hardware, and up to 2000 bytes for frames that are bridged by
software
IEEE 802.3x flow control on all ports (the switch does not send
pause frames) EtherChannel for enhanced fault tolerance and for
providing up to 8 Gb/s (Gigabit EtherChannel)
or 800 Mb/s (Fast EtherChannel) full-duplex bandwidth among
switches, routers, and servers Port Aggregation Protocol (PAgP) and
Link Aggregation Control Protocol (LACP) for automatic
creation of EtherChannel links Forwarding of Layer 2 packets at
Gigabit line rate Per-port storm control for preventing broadcast,
multicast, and unicast storms Port blocking on forwarding unknown
Layer 2 unknown unicast, multicast, and bridged broadcast
traffic Internet Group Management Protocol (IGMP) snooping for
IGMP Versions 1, 2, and 3 for
efficiently forwarding multimedia and multicast traffic IGMP
report suppression for sending only one IGMP report per multicast
router query to the
multicast devices (supported only for IGMPv1 or IGMPv2 queries)
IGMP snooping querier support to configure switch to generate
periodic IGMP general query
messages
IPv6 host support for basic IPv6 management Multicast Listener
Discovery (MLD) snooping to enable efficient distribution of IP
version 6 (IPv6)
multicast data to clients and routers in a switched network
Note To use IPv6 features, the switch must be running the LAN
Base image.1-3Catalyst 3750 Switch Software Configuration Guide
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Chapter 1 OverviewFeatures Multicast VLAN registration (MVR) to
continuously send multicast streams in a multicast VLAN while
isolating the streams from subscriber VLANs for bandwidth and
security reasons
Note To use MVR, the switch must be running the LAN Base
image.
IGMP filtering for controlling the set of multicast groups to
which hosts on a switch port can belong IGMP throttling for
configuring the action when the maximum number of entries is in the
IGMP
forwarding table IGMP leave timer for configuring the leave
latency for the network Switch Database Management (SDM) templates
for allocating system resources to maximize
support for user-selected features Support for Cisco IOS IP
Service Level Agreements (SLAs) responder that allows the system
to
anticipate and respond to Cisco IOS IP SLAs request packets for
monitoring network performance. See the release notes for responder
configuration.
Configurable small-frame arrival threshold to prevent storm
control when small frames (64 bytes or less) arrive on an interface
at a specified rate (the threshold)
Flex Link Multicast Fast Convergence to reduce the multicast
traffic convergence time after a Flex Link failure
Note To use Flex Link Multicast Fast Convergence, the switch
must be running the LAN Base image.
RADIUS server load balancing to allow access and authentication
requests to be distributed evenly across a server group.
Management Options An embedded device managerThe device manager
is a GUI that is integrated in the software
image. You use it to configure and to monitor a single switch.
For information about launching the device manager, see the getting
started guide. For more information about the device manager, see
the switch online help.
Network AssistantNetwork Assistant is a network management
application that can be downloaded from Cisco.com. You use it to
manage a single switch, a cluster of switches, or a community of
devices. For more information about Network Assistant, see Getting
Started with Cisco Network Assistant, available on Cisco.com.
CLIThe Cisco IOS software supports desktop- and
multilayer-switching features. You can access the CLI either by
connecting your management station directly to the switch console
port or by using Telnet from a remote management station. For more
information about the CLI, see Chapter 2, Using the Command-Line
Interface.
SNMPSNMP management applications such as CiscoWorks2000 LAN
Management Suite (LMS) and HP OpenView. You can manage from an
SNMP-compatible management station that is running platforms such
as HP OpenView or SunNet Manager. The switch supports a
comprehensive set of MIB extensions and four remote monitoring
(RMON) groups. For more information about using SNMP, see Chapter
29, Configuring SNMP.1-4Catalyst 3750 Switch Software Configuration
Guide
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Chapter 1 OverviewFeatures Cisco IOS Configuration Engine
(previously known to as the Cisco IOS CNS agent)-Configuration
service automates the deployment and management of network devices
and services. You can automate initial configurations and
configuration updates by generating switch-specific configuration
changes, sending them to the switch, executing the configuration
change, and logging the results. For more information about CNS,
see Chapter 5, Configuring Cisco IOS Configuration Engine.
Manageability Features CNS embedded agents for automating switch
management, configuration storage, and delivery DHCP for automating
configuration of switch information (such as IP address, default
gateway,
hostname, and Domain Name System [DNS] and TFTP server names)
DHCP relay for forwarding User Datagram Protocol (UDP) broadcasts,
including IP address
requests, from DHCP clients DHCP server for automatic assignment
of IP addresses and other DHCP options to IP hosts DHCP-based
autoconfiguration and image update to download a specified
configuration a new
image to a large number of switches DHCP server port-based
address allocation for the preassignment of an IP address to a
switch port Directed unicast requests to a DNS server for
identifying a switch through its IP address and its
corresponding hostname and to a TFTP server for administering
software upgrades from a TFTP server
Address Resolution Protocol (ARP) for identifying a switch
through its IP address and its corresponding MAC address
Unicast MAC address filtering to drop packets with specific
source or destination MAC addresses Configurable MAC address
scaling that allows disabling MAC address learning on a VLAN to
limit
the size of the MAC address table Cisco Discovery Protocol (CDP)
Versions 1 and 2 for network topology discovery and mapping
between the switch and other Cisco devices on the network Link
Layer Discovery Protocol (LLDP) and LLDP Media Endpoint Discovery
(LLDP-MED) for
interoperability with third-party IP phones LLDP media
extensions (LLDP-MED) location TLV that provides location
information from the
switch to the endpoint device
Note To use LLDP-MED, the switch must be running the LAN Base
image.
Network Time Protocol (NTP) for providing a consistent time
stamp to all switches from an external source
Cisco IOS File System (IFS) for providing a single interface to
all file systems that the switch uses Support for the SSM PIM
protocol to optimize multicast applications, such as video Source
Specific Multicast (SSM) mapping for multicast applications
provides a mapping of source
to group, allowing listeners to connect to multicast sources
dynamically and reduces dependencies on the application
Support for Enhanced Interior Gateway Routing Protocol (EIGRP)
IPv6 to utilize IPv6 transport, communicate with IPv6 peers, and
advertise IPv6 routes1-5Catalyst 3750 Switch Software Configuration
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Chapter 1 OverviewFeatures Support for these IP services, making
them VRF aware so that they can operate on multiple routing
instances: HSRP, GLBP, uRPF, ARP, SNMP, IP SLA, TFTP, FTP, syslog,
traceroute, and ping
Configuration logging to log and to view changes to the switch
configuration Unique device identifier to provide product
identification information through a show inventory
user EXEC command display In-band management access through the
device manager over a Netscape Navigator or Microsoft
Internet Explorer browser session In-band management access for
up to 16 simultaneous Telnet connections for multiple CLI-based
sessions over the network
In-band management access for up to five simultaneous, encrypted
Secure Shell (SSH) connections for multiple CLI-based sessions over
the network (requires the cryptographic version of the
software)
In-band management access through SNMP Versions 1, 2c, and 3 get
and set requests Out-of-band management access through the switch
console port to a directly attached terminal or
to a remote terminal through a serial connection or a modem
Secure Copy Protocol (SCP) feature to provide a secure and
authenticated method for copying
switch configuration or switch image files (requires the
cryptographic version of the software) Configuration replacement
and rollback to replace the running configuration on a switch with
any
saved Cisco IOS configuration file The HTTP client in Cisco IOS
supports can send requests to both IPv4 and IPv6 HTTP server,
and
the HTTP server in Cisco IOS can service HTTP requests from both
IPv4 and IPv6 HTTP clients Simple Network and Management Protocol
(SNMP) can be configured over IPv6 transport so that
an IPv6 host can send SNMP queries and receive SNMP
notifications from a device running IPv6 IPv6 stateless
autoconfiguration to manage link, subnet, and site addressing
changes, such as
management of host and mobile IP addresses Disabling MAC address
learning on a VLAN DHCP server port-based address allocation for
the preassignment of an IP address to a switch port. Wired location
service sends location and attachment tracking information for
connected devices to
a Cisco Mobility Services Engine (MSE). CPU utilization
threshold trap monitors CPU utilization. LLDP-MED network-policy
profile time, length, value (TLV) for creating a profile for voice
and
voice-signalling by specifying the values for VLAN, class of
service (CoS), differentiated services code point (DSCP), and
tagging mode
Availability and Redundancy Features UniDirectional Link
Detection (UDLD) and aggressive UDLD for detecting and
disabling
unidirectional links on fiber-optic interfaces caused by
incorrect fiber-optic wiring or port faults IEEE 802.1D Spanning
Tree Protocol (STP) for redundant backbone connections and
loop-free
networks. STP has these features: Up to 128 spanning-tree
instances supported1-6Catalyst 3750 Switch Software Configuration
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Chapter 1 OverviewFeaturesNote Up to 64 spanning-tree instances
are supported when the switch is running the LAN Lite image.
Per-VLAN spanning-tree plus (PVST+) for load balancing across
VLANs Rapid PVST+ for load balancing across VLANs and providing
rapid convergence of spanning-tree
instances UplinkFast and BackboneFast for fast convergence after
a spanning-tree topology change and
for achieving load balancing between redundant uplinks,
including Gigabit uplinks IEEE 802.1s Multiple Spanning Tree
Protocol (MSTP) for grouping VLANs into a spanning-tree
instance and for providing multiple forwarding paths for data
traffic and load balancing and rapid per-VLAN Spanning-Tree plus
(rapid-PVST+) based on the IEEE 802.1w Rapid Spanning Tree Protocol
(RSTP) for rapid convergence of the spanning tree by immediately
changing root and designated ports to the forwarding state
Optional spanning-tree features available in PVST+, rapid-PVST+,
and MSTP mode: Port Fast for eliminating the forwarding delay by
enabling a port to immediately change from
the blocking state to the forwarding state BPDU guard for
shutting down Port Fast-enabled ports that receive bridge protocol
data units
(BPDUs) BPDU filtering for preventing a Port Fast-enabled port
from sending or receiving BPDUs Root guard for preventing switches
outside the network core from becoming the spanning-tree
root
Loop guard for preventing alternate or root ports from becoming
designated ports because of a failure that leads to a
unidirectional link
Flex Link Layer 2 interfaces to back up one another as an
alternative to STP for basic link redundancy
Note To use Flex Links, the switch must be running the LAN Base
image.
Link-state tracking to mirror the state of the ports that carry
upstream traffic from connected hosts and servers, and to allow the
failover of the server traffic to an operational link on another
Cisco Ethernet switch.
Note To use Link-state Tracking, the switch must be running the
LAN Base image.
VLAN Features Support for up to 255 VLANs for assigning users to
VLANs associated with appropriate network
resources, traffic patterns, and bandwidth
Note Up to 64 VLANs are supported when the switch is running the
LAN Lite image.1-7Catalyst 3750 Switch Software Configuration
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Chapter 1 OverviewFeatures Support for VLAN IDs in the 1 to 4094
range as allowed by the IEEE 802.1Q standard VLAN Query Protocol
(VQP) for dynamic VLAN membership IEEE 802.1Q trunking
encapsulation on all ports for network moves, adds, and
changes;
management and control of broadcast and multicast traffic; and
network security by establishing VLAN groups for high-security
users and network resources
Dynamic Trunking Protocol (DTP) for negotiating trunking on a
link between two devices and for negotiating the type of trunking
encapsulation (IEEE 802.1Q) to be used
VLAN Trunking Protocol (VTP) and VTP pruning for reducing
network traffic by restricting flooded traffic to links destined
for stations receiving the traffic
Voice VLAN for creating subnets for voice traffic from Cisco IP
Phones VLAN 1 minimization for reducing the risk of spanning-tree
loops or storms by allowing VLAN 1
to be disabled on any individual VLAN trunk link. With this
feature enabled, no user traffic is sent or received on the trunk.
The switch CPU continues to send and receive control protocol
frames.
VLAN Flex Link Load Balancing to provide Layer 2 redundancy
without requiring Spanning Tree Protocol (STP). A pair of
interfaces configured as primary and backup links can load balance
traffic based on VLAN.
Note To use VLAN Flex Link Load Balancing, the switch must be
running the LAN Base image.
Support for 802.1x authentication with restricted VLANs (also
known as authentication failed VLANs) in all switch images.
Security Features IP Service Level Agreements (IP SLAs)
responder support that allows the switch to be a target
device for IP SLAs active traffic monitoring
Note To use IP SLAs, the switch must be running the LAN Base
image.
Web authentication to allow a supplicant (client) that does not
support IEEE 802.1x functionality to be authenticated using a web
browser
Note To use Web Authentication, the switch must be running the
LAN Base image.
Local web authentication banner so that a custom banner or an
image file can be displayed at a web authentication login
screen
IEEE 802.1x Authentication with ACLs and the RADIUS Filter-Id
Attribute
Note To use this feature, the switch must be running the LAN
Base image.
Password-protected access (read-only and read-write access) to
management interfaces (device manager, Network Assistant, and the
CLI) for protection against unauthorized configuration changes
Multilevel security for a choice of security level,
notification, and resulting actions1-8Catalyst 3750 Switch Software
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Chapter 1 OverviewFeatures Static MAC addressing for ensuring
security Protected port option for restricting the forwarding of
traffic to designated ports on the same switch Port security option
for limiting and identifying MAC addresses of the stations allowed
to access
the port VLAN aware port security option to shut down the VLAN
on the port when a violation occurs,
instead of shutting down the entire port. Port security aging to
set the aging time for secure addresses on a port BPDU guard for
shutting down a Port Fast-configured port when an invalid
configuration occurs Standard and extended IP access control lists
(ACLs) for defining inbound security policies on
Layer 2 interfaces (port ACLs) Extended MAC access control lists
for defining security policies in the inbound direction on Layer
2
interfaces
Source and destination MAC-based ACLs for filtering non-IP
traffic DHCP snooping to filter untrusted DHCP messages between
untrusted hosts and DHCP servers IP source guard to restrict
traffic on nonrouted interfaces by filtering traffic based on the
DHCP
snooping database and IP source bindings Dynamic ARP inspection
to prevent malicious attacks on the switch by not relaying invalid
ARP
requests and responses to other ports in the same VLAN IEEE
802.1x port-based authentication to prevent unauthorized devices
(clients) from gaining
access to the network. These features are supported: Multidomain
authentication (MDA) to allow both a data device and a voice
device, such as an
IP phone (Cisco or non-Cisco), to independently authenticate on
the same IEEE 802.1x-enabled switch port
Note To use MDA, the switch must be running the LAN Base
image.
Dynamic voice virtual LAN (VLAN) for MDA to allow a dynamic
voice VLAN on an MDA-enabled port
VLAN assignment for restricting 802.1x-authenticated users to a
specified VLAN Port security for controlling access to 802.1x ports
Voice VLAN to permit a Cisco IP Phone to access the voice VLAN
regardless of the authorized
or unauthorized state of the port IP phone detection enhancement
to detect and recognize a Cisco IP phone. Guest VLAN to provide
limited services to non-802.1x-compliant users Restricted VLAN to
provide limited services to users who are 802.1x compliant, but do
not have
the credentials to authenticate via the standard 802.1x
processes
Note To use authentication with restricted VLANs, the switch
must be running the LAN Base image.
802.1x accounting to track network usage1-9Catalyst 3750 Switch
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Chapter 1 OverviewFeatures 802.1x with wake-on-LAN to allow
dormant PCs to be powered on based on the receipt of a specific
Ethernet frame
Note To use authentication with wake-on-LAN, the switch must be
running the LAN Base image
802.1x readiness check to determine the readiness of connected
end hosts before configuring IEEE 802.1x on the switch
Note To use 802.1x readiness check, the switch must be running
the LAN Base image.
Voice aware 802.1x security to apply traffic violation actions
only on the VLAN on which a security violation occurs.
Note To use voice aware 802.1x authentication, the switch must
be running the LAN Base image.
MAC authentication bypass to authorize clients based on the
client MAC address.
Note To use MAC authentication bypass, the switch must be
running the LAN Base image.
Network Admission Control (NAC) Layer 2 802.1x validation of the
antivirus condition or posture of endpoint systems or clients
before granting the devices network access.For information about
configuring NAC Layer 2 802.1x validation, see the Configuring NAC
Layer 2 802.1x Validation section on page 9-55.
Note To use NAC, the switch must be running the LAN Base
image.
Network Edge Access Topology (NEAT) with 802.1X switch
supplicant, host authorization with CISP, and auto enablement to
authenticate a switch outside a wiring closet as a supplicant to
another switch.
IEEE 802.1x with open access to allow a host to access the
network before being authenticated. IEEE 802.1x authentication with
downloadable ACLs and redirect URLs to allow per-user ACL
downloads from a Cisco Secure ACS server to an authenticated
switch. Flexible-authentication sequencing to configure the order
of the authentication methods that a
port tries when authenticating a new host. Multiple-user
authentication to allow more than one host to authenticate on an
802.1x-enabled
port.
TACACS+, a proprietary feature for managing network security
through a TACACS server RADIUS for verifying the identity of,
granting access to, and tracking the actions of remote users
through authentication, authorization, and accounting (AAA)
services Secure Socket Layer (SSL) Version 3.0 support for the HTTP
1.1 server authentication, encryption,
and message integrity and HTTP client authentication to allow
secure HTTP communications (requires the cryptographic version of
the software)
IEEE 802.1x Authentication with ACLs and the RADIUS Filter-Id
Attribute1-10Catalyst 3750 Switch Software Configuration Guide
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Chapter 1 OverviewFeaturesQoS and CoS Features Automatic QoS
(auto-QoS) to simplify the deployment of existing QoS features by
classifying
traffic and configuring egress queues
Note To use auto-QoS, the switch must be running the LAN Base
image.
Classification IP type-of-service/Differentiated Services Code
Point (IP ToS/DSCP) and IEEE 802.1p CoS
marking priorities on a per-port basis for protecting the
performance of mission-critical applications
Note To use DSCP, the switch must be running the LAN Base
image.
IP ToS/DSCP and IEEE 802.1p CoS marking based on flow-based
packet classification (classification based on information in the
MAC, IP, and TCP/UDP headers) for high-performance quality of
service at the network edge, allowing for differentiated service
levels for different types of network traffic and for prioritizing
mission-critical traffic in the network
Note To use flow-based packet classification, the switch must be
running the LAN Base image.
Trusted port states (CoS, DSCP, and IP precedence) within a QoS
domain and with a port bordering another QoS domain
Trusted boundary for detecting the presence of a Cisco IP Phone,
trusting the CoS value received, and ensuring port s