Extension mobility question

[ciscoforum]

Want to confirm something with you guys:

Currently extension mobility ip phone service http link is pinting to publihser. when publisher goes down, EM user won't be able to logon any more. I am planing to use sub. so when pub goes down. sub will still take care of em. if sub goes down, i can go to pub to quickly change the em http link. What do you think?

Thanks

[anup.anand]

Extension Mobility feature needs access to the Publisher database for login/logout functions. Hence irrespective of whether the http link is pointing to the pub or sub, EM will not function if the Publisher goes down.

Regards,

Anup

[ciscoforum]

Hi My CCM is 3.33. Here is what I quoted from

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/3_3/sys_ad/3_3_3/ccmfeat/fsem.htm#1046337. It doesn't mention it has to be publisher at all.

"When you install Cisco CallManager 3.3(3), Cisco CallManager Extension Mobility automatically gets installed on any server in the Cisco CallManager cluster"

"Step 4 At the Service URL field, enter the IP address of the Cisco CallManager server:

http:///emapp/EMAppServlet?device=

#DEVICENAME#

where IPAddressofCallManager is the IP Address of the Cisco CallManager where Cisco CallManager Extension Mobility is installed."

[jneiberger]

The publisher has a read-write copy of the database, while the subscribers have read-only copies of the database. Certain features, like EM, require making changes to the database and therefore require that the publisher and the read-write database be up and running.