Configuring redundant URL Servers for 7940/7960 phones

[swharvey]

Currently we run a single Publisher and Subscriber, with all phones obtaining Information, Directories, and Services URL's from our Subscriber server. Is there a way to setup the Publisher so it can be a backup server for these services if the Subscriber server is offiline?

[Brandon Buffin]

There is currently no way in CCM to achieve this type of redundancy. One option is to use round robin DNS to simulate redundancy.

Brandon

[wjbell-fm]

Same concept, different DNS feature. We use CNAME records and can push changes to the DNS server. This requires that you have a relatively short lifetime on DNS auth. responses.

Another approach, if you have the equipment, is to use a load balancer solution.

You could also offload your web services (to a certain extent) to other dedicated web hosts that may have redundancy options built into the solution.

Or, a mixture of all of these which is how we deal with things.

[johnnylingo]

I know when entering the URL for the service, you can use the variable #DEVICENAME# for the phone's device name. Wonder if there's a variable you can use for the active CallManager...