[Asterisk-Users] Cisco gateways and hairpinning

[Shaoul Jacobson - TELLINK]

Hi,

Some time I did not touch a cisco.
At a previous job, I managed a 53xx

If I remembered well, you can define dial-peers at ingress and outgress.
The trick is the add a very specific header at ingress and remove it at
outgress.

Also, by then, not all traffic directions where possible on the 53xx.
IP -> E1/T1		ok
E1/T1 -> IP		ok
E1/T1 -> E1/T1	ok

IP-> IP		NOT OK !

I had to loose 2 E1's to move IP traffic back to IP
So, I had IP -> E1.0 -> E1.1 -> IP
The destination IP could be the same as original (hairpin) or different

That was some times ago, only on the 5300 and from memory

Regards,

Shaoul Jacobson
Senior VoIP Consultant
Tellink
Tel :	+32 3 201 96 36
Fax : 	+32 3 227 09 81
e-mail	shaoul at tellink.com


-----Original Message-----
From: Steve Blair [mailto:blairs at isc.upenn.edu] 
Sent: mercredi 16 mars 2005 16:35
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [Asterisk-Users] Cisco gateways and hairpinning

Hello:

 Has anyone on this list had to configure hairpinning on a Cisco
gateway running IOS 12.2 or 12.3 and using a PRI for connectivity
to the PSTN? If so could you tell me how it is done? I'm told this
is the source of my call transfer problems and yet I cannot find
clear instructions for how the configuration is done.

Thanks,Steve