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Cisco TelePresence Video Communication Server (VCS)

Alternate/peer usage within a Cisco VCS cluster

Alternate /peer usage within a Cisco TelePresence Video Communication Server (Cisco VCS) cluster

Can a Cisco VCS Control be used as an alternate or peer of a Cisco VCS Expressway?

No. Clustering of alternates (also known as peers) requires all units to have an identical configuration, otherwise the call routing might change when endpoints start using the alternate. As Cisco VCS Controls and Cisco VCS Expressways are different products, they cannot have the same configuration and cannot be used as alternates of each other.

A Cisco VCS Control can only be part of a cluster of alternate Cisco VCS Controls; a Cisco VCS Expressway can only be part of a cluster of alternate Cisco VCS Expressways.

Can a Cisco acquired TANDBERG Gatekeeper or Border Controller be used as part of a Cisco VCS cluster?

No. A cluster can only be made up of between two and six Cisco VCSs, which must all be running the same software version.

Can a Cisco VCS be used as an alternate to a Gatekeeper or Border Controller?

No. In H.323, units which act as gatekeepers (such as the Cisco VCS, Gatekeeper and Border Controller) can be configured as alternates to each other. If one unit fails the other can take over and route calls as normal. That requires both units to have an identical configuration, or the call routing might change when endpoints start using the alternate. As Cisco VCSs, Gatekeepers and Border Controllers are all different products, they cannot have the same configuration and can not be used as alternates.

A Cisco VCS can only have other Cisco VCSs as its alternates; a Border Controller can only have other Border Controllers as its alternates; and a Gatekeeper can only have other Gatekeepers as its alternates.

This article applies to the following products:

  • Cisco Video Communication Server

June 16th, 2011TAA_KB_170