Cisco Cisco TelePresence Video Communication Server Expressway
Unified CM
1. If you have multiple Unified CM clusters, you must confgure ILS (Intercluster Lookup Service) on all of
the clusters.
This is because the VCS needs to communicate with each user's home Unified CM cluster, and to
discover the home cluster it sends a UDS (User Data Service) query to any one of the Unified CM nodes.
Search for "Intercluster Lookup Service" in the
This is because the VCS needs to communicate with each user's home Unified CM cluster, and to
discover the home cluster it sends a UDS (User Data Service) query to any one of the Unified CM nodes.
Search for "Intercluster Lookup Service" in the
2. Ensure that the Maximum Session Bit Rate for Video Calls between and within regions (
System
> Region Information > Region
) is set to a suitable upper limit for your system, for example 6000 kbps.
for more information.
3. The Phone Security Profiles in Unified CM (
System > Security > Phone Security Profile
) that are
configured for TLS and are used for devices requiring remote access must have a Name in the form of an
FQDN that includes the enterprise domain, for example jabber.secure.example.com. (This is because
those names must be present in the list of Subject Alternate Names in the VCS Control's server
certificate.)
FQDN that includes the enterprise domain, for example jabber.secure.example.com. (This is because
those names must be present in the list of Subject Alternate Names in the VCS Control's server
certificate.)
Unified Communications Mobile and Remote Access via Cisco VCS Deployment Guide (X8.6)
Page 14 of 55
Configuration overview