Thanks for the link, but my scenario is more simple. In my scenario both the CMEs are locally located in the same LAN itself. And I am configuring HSRP for CME redundancy, wanna know if need to configure CME fallback in the telephony services also.
It's hard to say for sure without doing some testing.
The first obstacle is making sure the configuration stays the same on both routers. Shouldn't be too bad, but there isn't a way to automate this easily.
You won't be able to gracefully fail this over, either. The other IP address will not be aware of the phone states, and this will cause the CME to receive messages from phones that it is not expecting. The CME will have problems with that.
The part I'm unsure about is if the CME receives messages from phones that in a different state than it expects, if it will make the phone re-register. If not, I don't think the phones will actually re-register.
If CME does detect this bad state, it may tell the phones to reset/re-register, but if not I don't think this would be a working system.
Some other possible solutions:
-Use different addresses, manually set the TFTP servers on the phones
-Use different addresses, and use something like 'ip source-address x secondary y' , 'ip source-address y secondary x' in telephony service. (CME 4.2 and later I believe).
-Manually change the TFTP files the phones download to include the address of the other CME
-Put in a feature request with your sales team to have redundant IP address support for CME
This may work, but I don't think it has ever been tested. Thus, it probably wouldn't be supported in the HSRP environment you're thinking of.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
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