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New Member

MAC Address Dependencies

We have an IP Telephony environment being setup encompassing 3 CallManager servers, 4 Unity servers and 1 IPCC Express server.

The MCS 7835 server that hosts the CallManager Publisher has had the NIC damaged to the point that a cable cannot be connected to either port. This will require the motherboard of the server to be replaced. As such, the NIC will now have a different MAC address.

The query is whether any of these other application servers, including the two subscriber servers, the four Unity servers or the IPCC Express server have any particular dependencies on the MAC address of the publisher.

Basically I just want to see if anyone else has experienced a similar issue and to see if there were any ongoing problems as a result of the server hardware changing.

New Member

Re: MAC Address Dependencies

No dependancies on the server MAC address.


Re: MAC Address Dependencies

CallManager has no dependencies on a particular MAC address. None of the components that talk to it care what MAC address it has. It's possible to force a server to be tied to a certain MAC address in the CallManager database, but I've never seen this actually done on any install and it isn't done by default.

While we're on the subject:

If you ever change your Unity hardware: Unity 3.x and below have no MAC address dependencies. Unity 4.0 and above are licensed by MAC address, so you would have to have your license reissued

If you ever change your IPCC Express hardware: No version of IPCC Express is currently tied to a MAC address via licensing or any other dependency. However, the license mechanism used in 3.0 and above lends itself to MAC address restrictions, so Cisco could easily change this in the future.

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