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How to forward SIP call out VPN on external interface? Cisco UC540

Posted on 2011-03-16
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I am unable to forward calls to another UC500/site connected on the same outside interface on  a UC500 router.  See the attached diagram.  Caller at 650-222-4444 calls 916-333-5555.  That call gets to UC500 Site A via a SIP trunk to a carrer.  Now x5555 has turned on CfdALL to x7777.  There is an IPsec tunnel between UC500 Site A and UC500 Site B.  And there is a SIP dial peer for extensions 77XX.  But this is failing and the caller hears "The number you have dialed is no longer in service".  Can you please advise if this should be doable?  And if yes - what's the mojo? Thank youj.
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Question by:amigan_99
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decoleur earned 1500 total points
ID: 35165745
there is an ACL associated with the interesting traffic that goes across your vpn between sites that is missing something. I suspect it is the route point at your main site that the sip connection terminates on.

To confirm this turn on the logging and watch what happens when you make a call from x5555 to x7777 to make sure it works. then set up call forwarding and try an internal call to x5555 and watch what it does in the logs. finally try to initiate a call from the outside to x5555 when it is forwarding and watch the logs. I suspect you will see the call try to get forwarded but fail because some part of the route doesn't know to go over the tunnel.

when you respond if you need more help, please include the logs.

hope this helps,

-t

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by:amigan_99
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We had to get this going so we just setup voice mail on the router rather than Exchange.  But thank you anyhow.
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