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Easy VPN Server with VOIP

Posted on 2007-03-20
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Last Modified: 2009-07-29
Cisco Easy VPN Server..I have setup the easy vpn server....I have 3 clients who connect to it via laptops and can access my LAN...my question is this...we also use cisco soft phones....can the clients of the easy vpn server make calls to each other?  I can call and its rings but when I answer you get one way voice...(one user can hear the other but not the other way around)  I have set the ACL to allow the clients to talk...this works fine when using regular site to site tunnels..
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Question by:bskinner1
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Expert Comment

by:srgilani
ID: 18761897
Cisco IP SoftPhone uses the network address of the regular networking interface by default when it registers its location with Cisco CallManager. When Cisco IP SoftPhone sets up its media stream with the corporate end of the connection, the address the corporate end tries to send the voice data to is the regular (ISP assigned) IP address.

The device on the corporate end of the connection cannot tell its packets are being dropped, since this is all done with User Datagram Protocol (UDP).

In order to get Cisco IP SoftPhone to have two-way audio when it uses VPN Client software, make sure that you have configured the VPN IP address, instead of the configured network adapter IP address under the "network audio settings".

Complete these steps:

Open Cisco IP SoftPhone and click the Settings icon
Select the Audio settings tab
Click Network Audio Settings.
Specify Address  (address of your vpn interface)

after that you have to restart vpn client.

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Author Comment

by:bskinner1
ID: 18764184
Ok..I wil try that...how about for 7960 phones...for instance...I have a 7960 at a remote site using the cisco remote vpn into a vpn server(the phone as a local ip of the local LAN and is using NAT to go out the VPN, bascially the router does the VPN tunnel for the whole remote LAN)...that 7960 can call eveyone on my LAN fine....but if that user tries to call another 7960 at a remote locaton(this user is using a 7960 as well, with a hardware VPN)...it will not work...anyone who is using the remote site hardware router to establish a vpn tunnel back to the server works fine...they just cannot call each other...ie...two remote sites cannot call each other...
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Accepted Solution

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srgilani earned 500 total points
ID: 18769565
Same applies to NAT senario, Your phone should register with NAT / VPN ip instead of its interface ip with call manager.
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Author Comment

by:bskinner1
ID: 18873866
Ok..so I just give the phone the NAT/VPN interface ip...problem is I get a different IP each time the tunnel is established from the pool..So should I just give the phone an IP in that range?  

Thanks..
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