09-29-2009 06:26 PM - edited 03-18-2019 10:39 AM
Hello Guru,
after MGCP fallback to SRST, what is the timer the SRST router back to CUCM? immediately? or some delay?
if it is immediately and if WAN link flaps, will the T1 D channel flap as well?
09-30-2009 07:15 AM
Hi,
Once the connection with the call manager is reestablished
the ip phones cancel their registeration to the SRST and reregister with the call manager
also could you plz show the 2nd ask in more details?
thanks
09-30-2009 10:28 AM
thx for the reply
the mgcp gateway will register back immediately after IP connectivity to CUCM servers restored
however, IP phones don't because the default 120 second
so during the 120 seconds, no outgoing calls via gateway, this is too bad
other thing, if the IP connectivity between CUCM and gateway are flapping, so the PRI D channels will be up/down, this is too bad as well
09-30-2009 10:27 AM
If you plan to use the default time interval between keepalive messages, which is 30
seconds, you do not have to perform this task.
otherwise,
SUMMARY STEPS
1. call-manager-fallback
2. keepalive seconds
3. exit
09-30-2009 10:36 AM
virverma
I am thinking we updated in same time, I did take a look the timer setup under call-manager-fallback, but it is for the communicate between SRST router and IP phones, not between SRST and CUCM
09-30-2009 10:57 AM
SRST will take over after 3 incomplete ntfy messages are sent to the call manger from the router. this is not configurable.
09-30-2009 11:06 AM
can I ask the SRST router stay there for certain time before switch back to CUCM?
09-30-2009 04:42 PM
sorry for late reply,
in cucm, in gateway configuration page there is option for
swithcback timing and swithcback uptime-delay
10-01-2009 07:32 PM
unfortunately, the way you introduced not working
I tried different combination, including config
ccm config
ccm config server
mgcp restart-delay
ccm switchback uptime-delay
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