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New Member

Phone keepalive

Got a basic question about keepalive in a two CCM cluster. I know the phone keeps active tcp session with standby CCM when phone is registered with the primary server. Say the primary for some reason does not respond keepalive within 30s, does phone switch to standby server right away or still have to wait for 3 times keepalive with the primary server?

3 REPLIES
Cisco Employee

Re: Phone keepalive

the phones by default send keepalives every 30 seconds to primary and 60 seconds to secondary.

the phone needs to miss 3 keepaliveacks to being the failover process

HTH

javalenc

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
New Member

Re: Phone keepalive

so if the primary server fails, will there be any service interuption for the phones?

Cisco Employee

Re: Phone keepalive

if the secondary server is alive there should be no interruption on the phones, any active calls will continue but without any service because the phone is no longer in contact with the server. also depending on the protocol and version of the GWs calls might stay up or be dropped.

HTH

javalenc

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
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