WAN Bandwidth Requirement for Call Manager Database Sync

prakashar · ‎05-18-2007

Hi,

I have 2 different sites connected across WAN.Each site has a Call Manager Server.Imagine Site B CCM(Subscriber) database to get synchronised with Site A Publisher Database.What amount of Bandwidth is required if each site uses 1000 Phones..

-Prakash

Chris Deren · ‎05-18-2007

The requirement is ~900 kbps deidcated for the replication between CMs.

Chris

prakashar · ‎05-19-2007

Hi,

How do you arrive at the Calculation..

-Prakash

Chris Deren · ‎05-19-2007

I state corrected the 900 kbps is only for Intra-Cluster Communication Signaling, you need additional 644 kbps for db replication. From CM SRND:

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a00806e8c27.html#wp1045846

"The minimum recommended bandwidth between sites that are clustered over the WAN is 1.544 Mbps. This amount allows for the minimum of 900 kbps for ICCS and 644 kbps for database and other inter-server traffic."

HTH,

Chris