Cisco Cisco TelePresence Video Communication Server Expressway

Routing configuration 

The DNS search rule defines when the DNS zone should be searched. 

A specific regular expression is configured which will prevent searches being made using the DNS 
zone (i.e. on the public internet) for destination addresses (URIs) using any SIP domains which are 
configured on the local network (local domains). 

To create the Search rules to route via DNS: 

 

1.  Go to the Search rules page (VCS configuration > Search rules > Rules). 

2. Click 

New. 

3.  Configure the fields as follows: 

 
 
 

Not applicable 

Enter DNS zone search rule

 

Not applicable 

Enter Search DNS zone (external 
calling)

 

Not applicable 

Enter 150

 

Not applicable 

Select AllZones

 

Not applicable 

Select AliasPatternMatch

Not applicable 

Select Regex

 

Not applicable 

Enter ((?!.*@%localdomains%$).*)

 

Not applicable 

Select Leave

 

Not applicable 

Select Continue

 

Not applicable 

Select DNSZone

 

Not applicable 

Select Enabled

 

4. Click 

Create search rule. 

 

 

 

Cisco VCS Deployment Guide: Basic Cisco VCS configuration – Cisco VCS Control with 
Cisco VCS Expressway 

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