Spent most of today trying L3 vs L2 vs L3 + dot1q for voice VLAN.. Same result - when internal calls are put On Hold - silence.. Finally tried a fresh set of phones with stock firmware. Everything worked straight away!
Basically, I just found a bug in 69xx CME 9.0 firmware ver 9.2.1 (SCCP). Phones on default load 9.0.2 work fine, even with a pure L3 switch on IP Base with multicast stub.
If anynoe is interested, here is my working CME multicast L3 3750 switch config on IP BASE:
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...