[cisco-voip] hairpin IP traffic to other router

Andrew Dignan andy at dignans.com
Mon Nov 7 19:27:25 EST 2005


Believe your config should look like this:

voice service voip
 allow-connections h323 to sip
!
dial-peer voice 1 pots
 description catch 2021 and reroute
 incoming called-number 2021
 direct-inward-dial
!
dial-peer voice 2 voip
 description send 2021 to router 2
 destination-pattern 2021
 session protocol sipv2
 session target ipv4:10.0.0.2
 dtmf-relay sip-notify
 codec g711ulaw
 no vad

the first pots dial-peer is only needed if you don't have another pots
dial-peerr with the "direct-inward-dial" command on it.

regards,

andy
berbee





> Hi,
> On an AS5400 ios 12.4(1)  I'm trying to forward some SIP traffic to
> another
> gateway.
> For the forwarding I setup these dial peers:
>
> dial-peer voice 1 pots
>  description catch 2021 and reroute
>  incoming called-number 2021
>  direct-inward-dial
> !
> dial-peer voice 2 voip
>  description send 2021 to router 2
>  destination-pattern 2021
>  session target ipv4:10.0.0.2
> !
>
> The idea being that incoming SIP traffic starting with 2021 would be sent
> on
> to an AS5400 on 10.0.0.2 .
>
> When I look at 'debug voip dialpeer all' I see this:
>
>    Calling Number=, Called Number=2021031234567, Peer Info
> Type=DIALPEER_INFO_SPEECH
> 06:45:08: //-1/2810714F8C70/DPM/dpMatchPeersCore:
>    Match Rule=DP_MATCH_DEST; Called Number=2021031234567
> 06:45:08: //-1/2810714F8C70/DPM/dpMatchCore:
>    Dial String=2021031234567, Expanded String=2021031234567, Calling
> Number=
>    Timeout=TRUE, Is Incoming=FALSE, Peer Info Type=DIALPEER_INFO_SPEECH
> 06:45:08: //-1/2810714F8C70/DPM/MatchNextPeer:
>    Result=Success(0); Outgoing Dial-peer=2 Is Matched
> 06:45:08: //-1/2810714F8C70/DPM/dpMatchPeersCore:
>    Result=Success(0) after DP_MATCH_DEST
> 06:45:08: //-1/2810714F8C70/DPM/dpMatchPeersMoreArg:
>    Result=SUCCESS(0)
>    List of Matched Outgoing Dial-peer(s):
>      1: Dial-peer Tag=2
>
> So it looks as if the dialpeer is found correctly, yet nothing is sent to
> the
> other router.
> Is this the correct way to forward SIP/h323 traffic to another router?
> Is the   dial-peer voice 1 pots actually needed when using SIP in SIP out?
> Any idea why the calls are not being forwarded?
>
> Thanks a lot.
> Richard.
>
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