[cisco-voip] Hairpinning on a VPN concentrator

[Linsemier, Matthew]

There are a lot of variables in question.

 

Assuming you are using a standard IPSec VPN connection then yes, IP
Communicator users (as well as hard phone users) can talk to each other
without any problems.  There are a few things to consider when using VPN
for voice.  Specifically, what your endpoint device is that you will be
using to connect.  VPN Concentrators such as the Cisco 3030 do not offer
any QoS (and none is roadmapped), so your packets are all going to be
handled in a first come first serve basis.  This could affect voice
quality.  If you utilize an IOS device such as a Cisco ISR, you can
implement QoS which can improve the overall user experience.  If you
were to push out Cisco 830/870 series routers to your end users, you
could utilize DMVPN so that users could create peer-to-peer tunnels that
are dynamically created when user A calls user B, rather then going
through the main site.

 

There are a bunch of options out there.  Hope this helps.

 

Matt 

 

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jonathan
Charles
Sent: Friday, July 28, 2006 11:26 AM
To: Cisco Voip
Subject: [cisco-voip] Hairpinning on a VPN concentrator

 

I have a bunch of users that want to connect (using IP Communicator) to
the network via VPN.

Can two users who are VPN'd in call each other? In other words, two
users connect via VPN using IPC, can they call one another? 



Jonathan


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