1 © 2003, Cisco Systems, Inc. All rights reserved. CCNA 2 v3.0 Module 4 Learning About Other Devices
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1© 2003, Cisco Systems, Inc. All rights reserved.
CCNA 2 v3.0 Module 4 Learning About Other Devices
222© 2003, Cisco Systems, Inc. All rights reserved.
Objectives
• Discovering and connecting to neighbors
• Getting information about remote devices
333© 2003, Cisco Systems, Inc. All rights reserved.
Cisco Discovery Protocol (CDP)
CDP is media and protocol independent, and runs on all Cisco equipment over the Subnetwork Access Protocol (SNAP).
444© 2003, Cisco Systems, Inc. All rights reserved.
Showing CDP Neighbor Entries
555© 2003, Cisco Systems, Inc. All rights reserved.
Implementation, Monitoring, and Maintenance of CDP
666© 2003, Cisco Systems, Inc. All rights reserved.
The show cdp interface Command
777© 2003, Cisco Systems, Inc. All rights reserved.
The show cdp neighbors Command
888© 2003, Cisco Systems, Inc. All rights reserved.
Creating a Network Map
• The show cdp neighbors [type number] [detail] command can be used to obtain the following:
Device ID — Address
Port ID — Capabilities
Version — Platform
IP network prefix
VTP management domain name (CDPv2 only)
Native VLAN (CDPv2 only)
Full/Half duplex (CDPv2)
999© 2003, Cisco Systems, Inc. All rights reserved.
Disabling CDP
101010© 2003, Cisco Systems, Inc. All rights reserved.
Troubleshooting CDP
111111© 2003, Cisco Systems, Inc. All rights reserved.
Telnet
121212© 2003, Cisco Systems, Inc. All rights reserved.
Telnet Operations
131313© 2003, Cisco Systems, Inc. All rights reserved.
Establishing Telnet Connections
• A host name table or access to DNS for Telnet must be present for a name to work. Otherwise, the IP address of the host must be entered.
• Denver>connect parisDenver>parisDenver>131.108.100.152Denver>telnet paris
• Telnet can be used to perform a test to determine whether access can be obtained from a remote router.
141414© 2003, Cisco Systems, Inc. All rights reserved.
Telnet Operations
151515© 2003, Cisco Systems, Inc. All rights reserved.
Advanced Telnet Operation
Multiple Telnet sessions can be used and suspended by using the Ctrl+Shift+6 and x sequence.
161616© 2003, Cisco Systems, Inc. All rights reserved.
Testing with the ping Command
171717© 2003, Cisco Systems, Inc. All rights reserved.
Testing with the traceroute Command
181818© 2003, Cisco Systems, Inc. All rights reserved.
Troubleshooting IP Addressing Issues
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