Load Balancing CSPS

[nwittenberg]

How can I load balance SIP invites coming from my gateway to my CSPS?

[teodorgeorgiev · Accepted solution]

Hi.

As far as I know, for load balancing and failover, cisco voice gateways do not support a secondary/backup SIP proxy-server configuration. The way they recommend this to be done is via DNS SRV records.

Read this articleМ

http://www.voip-info.org/tiki-index.php?page=SER+load+balancing

Another way to do it, is to put next to your gateway a dumb stateless proxy (even Linux configured) with iptables and ip route) to load balance for you.

[nwittenberg]

I actually ended up using two dial-peers on my gateway with the same destination pattern but the two different IP addresses of my CSPSs. Then with the "dial-peer hunt" command with an argument of 7 which means use least recently used dial-peer I am able to load balance. Don't forget to set your retry INVITE parameter under SIP configuration for failover.