Cisco IP Telephony - Network Design Guide(1).pdf

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Cisco IP Telephony
Network Design Guide
Cisco CallManager Release 3.0(5)
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Text Part Number: 78-11103-03
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Cisco IP Telephony Network Design Guide
Copyright © 2000, 2001, Cisco Systems, Inc.
All rights reserved.
C O N T E N T S
Preface xi
Purpose
xi
Audience
xii
Organization
xii
Revision History
xiv
Conventions
xv
Additional Information
xvii
Obtaining Documentation
xviii
World Wide Web
xviii
Documentation CD-ROM
xviii
Ordering Documentation
xviii
Documentation Feedback
xix
Obtaining Technical Assistance
xix
Cisco.com
xix
Technical Assistance Center
xx
Contacting TAC by Using the Cisco TAC Website
xx
Contacting TAC by Telephone
xxi
1
CHAPTER
Introduction
1-1
General Design Models
1-1
Single-Site Model
1-3
Multiple Sites with Independent Call Processing
1-5
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Contents
Multisite IP WAN with Distributed Call Processing
1-7
Multisite IP WAN with Centralized Call Processing
1-10
2
CHAPTER
Campus Infrastructure Considerations
2-1
Overview
2-2
Power Protection Strategies
2-4
Network Infrastructure
2-5
High Availability
2-7
Physical Connectivity Options
2-9
Power to IP Phones
2-10
Inline Power
2-10
Establishing Power to the IP Phone
2-12
Inline Power Configuration
2-13
Other Inline Power Considerations
2-15
External Patch Panel Power
2-17
Wall Power
2-20
Summary of Recommendations
2-20
IP Addressing and Management
2-21
CDP Enhancements
2-22
VVID Field
2-22
Trigger Field
2-22
Power Requirement Field
2-23
Auxiliary VLANs and Data VLANs
2-23
Voice VLAN Configuration
2-24
Connecting to the Network
2-25
Sample Addressing Plan and Recommendations
2-26
Cisco IP Telephony Network Design Guide
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Contents
Quality of Service
2-28
Traffic Classification Types
2-28
Trust Boundaries
2-29
Traffic Classification at Layer 2
2-30
Traffic Classification at Layer 3
2-34
Layer 3 Traffic Classification on the Cisco Catalyst 6000
2-34
Summary of Capabilities and Recommendations
2-36
3
CHAPTER
Cisco CallManager Clusters
3-1
Cluster Operation and Scalability Guidelines
3-1
Device Weights
3-3
Intracluster Communication
3-5
Cisco CallManager Redundancy
3-6
Redundancy Group Configurations
3-6
Device Pool Configuration
3-9
Campus Clustering Guidelines
3-12
Intercluster Communication
3-14
Cluster Provisioning for the Campus
3-14
Clusters for Multisite WAN with Distributed Call Processing
3-15
Clusters for Multisite WAN with Centralized Call Processing
3-18
Intracluster and Intercluster Feature Transparency
3-21
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