Designing and Deploying Next Generation Voice 2 - Testertechsuite.net/bonnet3/wireless/voicenet_design.pdf · network is down • Overtime • ... VoIP Long Distance SP ... Microsoft

1© 2001, Cisco Systems, Inc. All rights reserved.Session NumberPresentation_ID

Designing and Deploying Next Generation Voice

Alec MclocklinConsulting Systems Eng. IPT

([email protected])

222© 2001, Cisco Systems, Inc. All rights reserved.Presentation_ID

Agenda

• High Availability• CallManager and PBX Integration• CallManager and Voicemail• Clustering Over the IPWAN• System Enhancements


HA Cost/Benefit AnalysisWhy Does High Availability Matter?

• Lost revenue due to downtime (contractual obligations)• Competitive pressure – competitor only a point and click away• Customer service or expectations• Shareholder satisfaction• Loss of goodwill (public

image)• Lost productivity when

network is down• Overtime• Consultants• Regulatory requirements• Additional margins of offering

higher SLAs• Reduced operating costs• Break fix costs• Root cause analysis


Causes of Network DowntimeUnscheduled Downtime Factors

2.6

5.5

7.6

8.3

8.5

11

11.3

12

12.1

26

0 5 10 15 20 25 30

Malicious damage

Acts of nature

Physical environment failures

Congestion/overload

Network software failures

Network operations failures

Unknown

Network hardware failures

Customer premises equipment failure

Physical link failures

hours

Mitigable by HA Design + Best PracticesMitigable by HA Systems and FeaturesMitigable by HA Protocols and Services (e.g. QoS)


HA Network Design – Campus HA SystemsCisco Catalyst 6500 Hardware Redundancy

• Power Supply and Fan Redundancy• Switch Fabric Module Redundancy• Supervisor Redundancy

MSFC Redundancy

High Availability Systems and Features


Layer 2 High Availability Campus DesignSpanning Tree Enhancements

• Portfast set spantree portfast mod/port enable

• BPDU Guardset spantree portfast bpdu-guard mod/port enable

• Uplinkfastset spantree uplinkfast enable

• Backbonefastset spantree backbonefast enable

• Loop-guardset spantree guard loop mod/port

High Availability Protocols and Services

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_7_4/confg_gd/stp_enha.htmhttp://wwwin-eng.cisco.com/Eng/ESE/CANI/Design/CampusNetworkDesign.doc


Scalability, High Availabilityand Smooth Migration

• Internet scalability • Tens of thousands of users

through Cisco clustering technology

• Add capacity when and where you need it

• Distributed application processing

• Network fabric resiliency and redundancy

• No single point of failure• Smooth migration from Old

World to New World

Campus

PSTN WAN

CallManager Clusters

MultiserviceWAN

CatalystWiring Closet


Layer 3 High Availability Services Configuring HSRP

High Availability Protocols and Services

WAN or

Internet

Router 2Router 2Router 1Router 1

!interface FastEthernet0/0ip address 10.21.8.32 255.255.255.0standby 10 ip 10.21.8.1standby 10 authentication STRINGXYZstandby priority 100 preemptstandby 10 timers 1 4standby 10 track ATM3/0

!

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfip.htm#xtocid28


Agenda

• High Availability• CallManager and PBX• CallManager and Voicemail• Clustering Over the IPWAN• System Enhancements


PSTN

Legacy Voicemail System

CallManagerCallManager

AVVID NetworkAVVID Network

IPT userMigration

Legacy PBX

Trunk between CCM and PBX

GatewayGateway

CallManager and PBX Integration

Telco


PSTN

Legacy Voicemail System

AVVID NetworkAVVID Network Legacy PBX

Trunk between CCM and PBX

CallManager and PBX Integration

DS3GatewayGateway

7200

7200

3700

3700

3660

3660-BK

T1


Telco

Telco


Cisco Router/Gateway Portfolio

Enterprise HQAnd Beyond

Enterprise HQAnd Beyond

Cisco 3600

Cisco 7x00

Cisco SOHO

Cisco 1700

Teleworker/SOHOTeleworker/SOHO SMB/Small BranchSMB/Small Branch Enterprise BranchEnterprise Branch Large BranchLarge Branch

Cisco 800

Cisco 1760

Cisco 2600XM/2691

Cisco 3725

Cisco 3745


Strategies for User Migration

• Building by Building / Floor by FloorEasy from a phone provisioning standpointPBX’s need to remain as tandem for PSTN calls and Inter-Cluster calls - more complex call routing

• Block of DN’s at a timeMore difficult to provision phones (80+ buildings)Calls to PSTN direct, Inter-Cluster calls direct via IP network -easier to program on PBXLess prone to error


PBX Vendor Characteristics

CallManagerTested

Calling NameSupport

Avaya Definity G3

Nortel Meridian 1

Siemens Hicom 300 E CS

Fujitsu 9600

Protocol

YesYes PRI NI-2 QSIG

YesYes NoNo

YesYes

YesYes Yes

YesYes

YesYes

PRI (DMS100) QSIG

PRI NI-2 QSIG

PRI NI-2 QSIG


Agenda



CallManager to Legacy Voicemail Integration

• Challenge:Keep existing Voicemail system and Integrate with both CallManager and PBX

• Solution differs depending on VM, PBX and type of Integration

• Octel is Voicemail market leader


CallManager Integration to Voicemail

Octel

DigitalFTL-N Integration

Octel

SMDI

Nortel


VM Vendor CharacteristicsVoicemail Vendor Certified Solutions

SMDI Support/CallManager Certified

Dual SMDISupport VPIM

Digital PhoneIntegration

Avaya Intuity YesYes/YesYes Yes No Yes

Avaya (VMX) 200/300 Yes NoYes/YesYes/Yes No

Avaya (Octel) 250/350 Yes/YesYes/Yes Yes NoYes

Meridian Mail (GP) Yes NoNoYesYes/No No

Siemens PhoneMail YesYes/No No NoYes

http://wwwin.cisco.com/ent/ese/

Nortel CallPilot No YesYesYesYes/No Yes


Dual Integration

• Sometimes necessary for migration or co-existence

• SMDI is currently only protocol that can handle this requirement


Octel Aria 250/350

SMDI


GatewayGateway


SMDI

Dual SMDI Integration

VoicePath

PBXLink - formerly from Calista

Analog Gateway(s)VG200or Catalyst 6K

This Works today!Texas Instruments - EFTNortel SL-100Octel Aria 350CallManager


DPA for Octel with Avaya or Nortel PBX

PSTN

Avaya or Nortel PBX


GatewayGateway

Octel Voicemail

DPA

PIC

PIC

Skinny


DPA for Octel with CallManager


Octel Voicemail

DPA

PSTNGatewayGateway

24 PIC interfaces

skinny

Allows for Octel PIC Integration to CallManager


Multi-Node Octel Networking with Interchange* & Unity Bridge

Interchange

Octel Node #5001

PSTN

Octel Node #3001

Octel Node #4001

•Messages routed through Interchange•Interchange controls directory•Lowers admin costs

Unity Bridge Node #2001

Unity


Cisco Unity

IP


GatewayGateway


Cisco Unity - CallManager Dual Switch Integration

VoicePath


Agenda



Clustering Over the WAN Spatial Redundancy

Voice Mail Server

Voice Mail Server

IP PhonesIP

Phones

Spatial Redundancy = ResilienceSpatial Redundancy = Resilience

Single Point of Administration, Extension Mobility, Single Point of Administration, Extension Mobility, Feature Transparency and Unified Dial PlanFeature Transparency and Unified Dial Plan

SpaceSpaceSpace

Can beused forBusiness

Continuance

Can beCan beused forused forBusinessBusiness

ContinuanceContinuance

L.A.L.A. San DiegoSan Diego

CallManager cluster Logical PBX


Clustering Over the WANBest Practices

Publisher / TFTP

WAN

• Four active locations maximum (4 active CMs)• Failover across the WAN supported (Additional BW)Check out the IP Telephony Design Guide for CallManager 3.2 and Check out the IP Telephony Design Guide for CallManager 3.2 and 3.3 for full details3.3 for full details

• 900 kbps for each 10,000 BHCA within the cluster

QoS Enabled BWQoS Enabled BW

< 40ms RTD

• 40ms round-trip delay between ANY two CallManagers


Clustering Over the WANRemote Failover – Normal Operation

BackupPrimary

WAN

• Highly Available QoS Enabled WAN

• Prioritized Bandwidth For ICCS

• Additional Bandwidth for SQL, LDAP etc

• No Backup During WAN Outages (SRST)

• No Configurations Changes During WAN Outages

PublisherRequirements


Agenda



Dial Plan Weight (cont.)

MCS 7835’s

TFTPPub

MCS 7845’s

TFTPPub

35,000 IP Phones, 20,000 Device Weight Units


H.323 EnhancementsAuto Discovery

GK

CM 3.0 - 3.1 Anonymous DeviceNo Auto Detect (Use MTP)

CM 3.0 - 3.1 Anonymous DeviceNo Auto Detect (Use MTP)

CM 3.3 H.323 TrunkCM 3.3 H.323 Trunk

CM 3.2 AnonymousDevice (H.225)Standard ICT to CM’s and H.225 to Others

CM 3.2 AnonymousDevice (H.225)Standard ICT to CM’s and H.225 to Others

Standard H.323 Gateway (H.225)Standard H.323 Gateway (H.225)

•CallManager’s use H.323 or E-ICT for communication

• H.225 With All Other Devices

• Migration From TollMigration From Toll--Bypass NetworksBypass Networks

CM 3.3 H.323 Trunk (H.225)(E)ICT to CM’s and H.225 to Others

CM 3.3 H.323 Trunk (H.225)(E)ICT to CM’s and H.225 to Others


H.323 Enhancements Inter-Cluster Trunks – Redundancy

Backup

Backup

Publisher

1

2

3

4

NewNewYorkYork

Publisher

Backup

Backup 1

2

3

4

SanSanJoseJoseHQHQ

1st Inter-cluster Trunk

2nd Inter-cluster Trunk

As of CallManager 3.3, redundancy is

built into the Inter-cluster Trunk

(2 (2 ICTsICTs instead of 6)instead of 6)


H.323 EnhancementsMultiple Gatekeeper

IP PSTN

GK

Internet

GK

EnterpriseWAN

GK

• Up to 10 Physical Gatekeeper’s Per Cluster

• Multiple H.323 Trunks Per CM Gatekeeper• Different Zones and/or Tech Prefixes

VoIP Long Distance SP

Gold VPN Service

Private Network Site to Site


Headquarters

Multi-service CPN

CableDSL

SOHO/Telecommuter

Branch Office

IP TelephonyServices

SOHOAccess SP

FR/ATM

Enet, etc.

IP Phone

IP Phone

V3PN (VoIP/Video enabled IPSec VPN):Deployment Models

Enterprise Owned/ManagedOr

Service Provider Managed Service


Managed IP PBX Integration with VPN Transport

HQ Branch Office HQ Branch Office

ServiceProvider

PSTN

Enterprise A Enterprise B

Ent-AGW

Ent-BGW

Internet

Ent-BVPN

Ent-AVPN

• Single Circuit for Voice, Video and Data for the Enterprise

• VPN for Intra-Enterprise Connectivity (IPSec/MPLS)

• Centralized Gateways located at Class 5 for PSTN access

• Enterprise or SP ManagedVPNIP PBX (CallManager)


SP Call Control Architecture(Cisco GK)

NMSBILLGLD Partner

GK

PSTNV V

DGK

PSTNV V

V V

PSTN

GKGK

PSTNAccess GK

UniversalDirectory GK

CCMEntBSite 1

EntASite 1

CCM

EntASite 2

PBX V

EntBSite 2

V ITS

Service Provider

DGK

EnterpriseAccess GK

EnterpriseAccess GK

GK

GK

AAA Billing off of Gatekeepers for On-Net CallsCM provides call duration in DRQ (CM 3.2)

AAA Billing off of PSTN GatewaysFor Off-Net calls

373737© 2001, Cisco Systems, Inc. All rights reserved.Presentation_ID 37Presentation_ID © 2001, Cisco Systems, Inc. All rights reserved.

Designing and Deploying Next Generation Voice 2 - Testertechsuite.net/bonnet3/wireless/voicenet_design.pdf · network is down • Overtime • ... VoIP Long Distance SP ... Microsoft

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