[cisco-voip] SRST and standby SUB?

[Ryan Ratliff]

So coming back from SRST there are 3 things that have to happen  
before the phone will re-register.
1. Establish TCP connection to one of the CMs
2. Wait out the "Connection Monitor Duration" timer so it knows the  
connection is stable (Enterprise Params, default 120 secs)
3. Request and receive a registration token from the server  
indicating that it can proceed with registration.

Both connection monitor duration and the registration token  
mechanisms are in place to make sure the failback process is as fast  
and problem-free as possible.

In your case is there anything between the sites that could be  
proxying the tcp connection from phone to CCM?  All "Standby" means  
is that there's a TCP session established but it's not actually  
registered.

Your best bet is going to be to reset the phone and get a packet  
capture.  look at the traffic on tcp 2000 to the CCM servers to see  
what's going on.

-Ryan

On May 11, 2009, at 11:43 AM, Scott Voll wrote:

no
sub
pub
srst


all via IP addresses

sub -- Standby
pub
SRST -- Active

Scott

On Mon, May 11, 2009 at 8:41 AM, Ryan Ratliff <rratliff at cisco.com>  
wrote:
On the phone what is the list of Communications Manages?  Does it  
somehow think the SRST is higher in priority than the sub?

-Ryan


On May 11, 2009, at 11:29 AM, Scott Voll wrote:

I'm banging my head on a wall.  What am I missing?

have a remote site over IPSEC VPN connection back to central CM cluster.

all has been working fine. but today I find that the three phones  
(all) are in SRST mode.  the VGW is still registered to the cluster.  
but from the web interface of the phones shows reg'd with SRST and  
standby with SUB.  How does that work?

I don't really understand the logs on the 7942.

I can ping from the sub and pub to the phones.  any ideas?

I can attach logs from the phone is that helps.

Thanks

Scott
_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip