Manual

Contents
Introduction 4
Example network deployment 5
Network elements 6
Internal network elements 6
DMZ network element 6
External network elements 7
NAT devices and firewalls 7
SIP and H.323 domain 7
Prerequisites and process summary 8
Prerequisites 8
Summary of process 8
Expressway system configuration 9
Task 1: Performing initial configuration 9
Task 2: Setting the system name 9
Task 3: Configuring DNS 10
System host name 10
Domain name 10
DNS servers 11
Task 4: Replacing the default server certificate 12
Task 5: Configuring NTP servers 13
Routing configuration 14
Pre-search transforms 14
Search rules 14
Task 6: Configuring transforms 14
Task 7: Configuring the traversal zone 15
Neighboring between Expressway clusters 19
Task 8: Configuring traversal zone search rules 20
Task 9: Configuring the DNS zone 22
Task 10: Configuring DNS zone search rules 23
Task 11: Configuring external (unknown) IP address routing 24
System checks 27
Zone status 27
Call signaling 27
Maintenance routine 28
Creating a system backup 28
Optional configuration tasks 29
Task 12: Configuring routes to a neighbor zone (optional) 29
Example: Cisco VCS neighbor zone 29
SIP trunks to Unified CM 30
Task 13: Configuring logging (optional) 30
Task 14: Restricting access to ISDN gateways (optional) 31
Expressway-E 31
Expressway-C 34
Cisco Expressway Basic Configuration Deployment Guide (X8.5.2) Page 2 of 57