The official answer that you would receive from Cisco, HP, and/or IBM is that you should run consistent firmware across all systems. In addition, they also recommend that you run the same speed of drive at least on a server level - i.e., all drives are 10k or 15k - not mixed and match.
Unofficially, at a previous company I've been at we had 8 CCM clusters one of which was a fully loaded cluster. Over the years, we ended up with mixed firmware and mixed drive speeds and there was no clear indication that it specifically caused any issues.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...