Cisco Cisco Expressway
Note that the regular expression used to prevent local domains being searched via the DNS zone can be broken down
into the following components:
into the following components:
(.*) = match all pattern strings
(?!.*@%localdomains%.*$).* = do not match any pattern strings ending in @localdomains
In the deployment example, calls destined for @cisco.com would be searched via the DNS zone, whereas calls destined
for @example.com would not.
for @example.com would not.
Task 11: Configuring External (Unknown) IP Address Routing
The following configuration defines how an Expressway routes calls (and other requests) to external IP addresses. An
external IP address is an IP address which is not ‘known’ to the Expressway and therefore assumed to be a publicly
routable address.
external IP address is an IP address which is not ‘known’ to the Expressway and therefore assumed to be a publicly
routable address.
■
All requests destined for external IP addresses, originating at the Expressway-C are routed to the Expressway-E
using a search rule.
using a search rule.
■
The Expressway-E then attempts to open a connection directly to the IP address.
To configure how the Expressway will handle calls to unknown IP addresses:
1.
Go to Configuration > Dial plan > Configuration.
2.
Configure the fields as follows:
Expressway-C
Expressway-E
Calls to unknown IP addresses
Indirect
Direct
3.
Click Save.
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Cisco Expressway-E and Expressway-C - Basic Configuration Deployment Guide