We have a global voip implementation being initiated within our organization. In our asain pacific region we would like to cluster our primary and subscriber in Hong Kong with a secondary subscriber in Tokyo. There are latency issues though, working with two of the largest providers in the area (singtel and anc.) They have indicated to us that the best latency that they are currently seeing between data-centers in HK and Tokyo is 55ms. The documentation indicates that the highest possible RTT for ICCA traffic is 40ms. Will it be possible to operate at 60ms? What difficulties will the system have?
You will probably be fine, however Cisco TAC may refuse support once you run into issues. The most critical issue you can expereince is database replication. I would suggest designing a deployment that meets all Cisco guidlines to avaoid issues during operation.
So perhaps splitting cluster accross WAN may be out of the picture :-(
I have came across this scenario but in my case the latency was more than 60 it was some around 64-65ms. The phones used to show as un-registered alongwith the gateways whereas they are originally registered with the local subscriber.
In SQL server replication used to take longer time, and many of the times used to show that connection could not be established which lead to great problem for exact troubleshooting.
These issues were not there, when we increased our BW. I was using CCM4.1.3 sr5b.
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...