[cisco-voip] Calls intermittently complete

[Jason Aarons (US)]

Do the two firewalls use the same ISP?  If the two ISPs have packet loss
then nothing will help. Latency doesn't effect TCP Skinny keepalives so
much as packet loss. I think you have to have 3 missed SCCP keepalives
for un-register.  

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
CarlosOrtiz at bayviewfinancial.com
Sent: Thursday, June 07, 2007 1:33 PM
To: Linsemier, Matthew
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Calls intermittently complete

 


Sorry it took so long to send this reply.  This LAN to LAN VPN tunnel is
between two ASA firewalls using AES 128.  The firewall admin is checking
to see if any QOS can be done with the ASA at the edge to help.  Does
anyone have any suggestions that may help with passing voice traffic
over a VPN?  One user who is using IP Communicator sees hos phone
unregister from time to time.  I can only guess this is being caused by
latency.   

Carlos 



"Linsemier, Matthew" <MLinsemier at apcapital.com> 

06/04/2007 11:59 AM 

To

<CarlosOrtiz at bayviewfinancial.com> 

cc

	
Subject

RE: [cisco-voip] Calls intermittently complete

 

		




What equipment are you using for your LAN-to-LAN VPN and are you doing
any QoS (LFI, marking, etc.) at the edge? 
  
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
CarlosOrtiz at bayviewfinancial.com
Sent: Friday, June 01, 2007 12:03 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Calls intermittently complete 
  

We have an office in the UK that is connected via LAN to LAN VPN.   They
have about 5 hard Cisco IP phones and a few users using IP communicator
that are using our Call Mge here in the US for site to site calls.
They have complained that calls do not complete sometimes.  I did some
testing with a guy using IP comminicator and he would see my call coming
in but was unable to pick it up.  I was watching with the Call Mgr admin
and noticed that his IP comminicator phone changed status from
registered to not registered when he attempted to answer the call.  I
simultaneously was pinging his phone and never saw a lost packet.  A
couple of trys later and the call completed, we had a conversation but
he saw the message "CM, Features Failed". 

Anyone have any insight here? 

Thanks, 

Carlos 

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