Cisco Cisco TelePresence Management Suite (TMS) Version 15 Installation Guide
Database Redundancy
Cisco TMS relies heavily on its SQL database, so a fully resilient Cisco TMS solution will also utilize one of the high-
availability technologies offered by SQL Server 2012.
availability technologies offered by SQL Server 2012.
Cisco TelePresence Management Suite Provisioning Extension
Limitations in a Redundant Deployment Using a Load Balancer
Note the following when implementing redundancy in your Cisco TMS environment:
■
Automatic update of the System Connectivity setting for systems (
Administrative Tools > Configuration
> Network Settings >
Update System Connectivity for Systems) is disabled in a redundant environment.
■
Tasks such as phone book and Active Directory synchronization could fail if a failover takes place:
—
while the tasks are running.
—
immediately before the tasks are scheduled to run.
■
Conferences will not be affected during a failover due to the frequency of retries for allocation and connection.
■
If using your own or a 3rd party booking client you must use the client session mechanism introduced in version
13 of Cisco TMSBA.See
13 of Cisco TMSBA.See
Deploying with a Load Balancer
Configuring two Cisco TMS servers (also referred to as "nodes" in this context) with a network load balancer (NLB)
provides a truly redundant Cisco TMS setup with fully automatic fail-over.
provides a truly redundant Cisco TMS setup with fully automatic fail-over.
Recommended Hardware
For new deployments, we recommend using an F5 BIG-IP load balancer. We also currently support using a Cisco ACE
4710 Application Control Engine Appliance, but support for this load balancer will be withdrawn in a future version of
Cisco TMS.
4710 Application Control Engine Appliance, but support for this load balancer will be withdrawn in a future version of
Cisco TMS.
Active Directory and User Authentication Requirements
■
Both Cisco TMS servers must be members of the same Windows domain.
■
All Cisco TMS users must be imported from and authenticated using Active Directory.
■
Using local user accounts is not supported for this redundancy model.
Overview
Nodes
Cisco TMS is a cluster-aware application when deployed behind a Network Load Balancer (NLB). When two Cisco
TMS servers are connected to the same tmsng database and redundancy is enabled in
TMS servers are connected to the same tmsng database and redundancy is enabled in
Administrative Tools > Con
figuration > General Settings
, one of the servers immediately becomes the active node, while the other server
becomes the passive node. Only one node can be active at any given time.
The active node behaves exactly like a stand-alone Cisco TMS server.
The passive node:
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Cisco TelePresence Management Suite Installation and Upgrade Guide
Setting up a Redundant Deployment