Cisco Cisco Expressway
Example Network Deployment
Figure 1 Example Network for the Deployment Described in this Document
Network Elements
Internal Network Elements
The internal network elements are devices which are hosted on your local area network. Elements on the internal
network have an internal network domain name. This name is not resolvable by a public DNS. For example, the Cisco
Expressway-C is configured with an internally resolvable name of expc.internal-domain.net (which resolves to an IP
address of 10.0.0.2 by the internal DNS servers).
network have an internal network domain name. This name is not resolvable by a public DNS. For example, the Cisco
Expressway-C is configured with an internally resolvable name of expc.internal-domain.net (which resolves to an IP
address of 10.0.0.2 by the internal DNS servers).
Element
Role
Cisco
Expressway-C
Expressway-C
SIP Registrar & Proxy.
EX90 and EX60
Example endpoints hosted on the internal network which register to the Cisco Expressway-C.
DNS (local 1 &
local 2)
local 2)
DNS servers used by the Cisco Expressway-C to perform DNS lookups (resolve network names
on the internal network).
on the internal network).
DHCP Server
Provides host, IP gateway, DNS server, and NTP server addresses to endpoints located on the
internal network.
internal network.
Cisco TMS
Server
Server
Syslog Server
NTP Server
Provides the clock source used to synchronize devices.
SIP and H.323 Domain
The example deployment is configured to route SIP (and H.323) signaling messages for calls made to URIs which use
the domain internal-domain.net. The DNS SRV configurations are described in
the domain internal-domain.net. The DNS SRV configurations are described in
.
8
Cisco Expressway Registrar Deployment Guide
Introduction