asterisk users - Mar 2005 - 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

-- 
  
ISC Network Engineering
The University of Pennsylvania
3401 Walnut Street, Suite 221A
Philadelphia, PA 19104  


voice: 215-573-8396 

       215-746-8001

fax: 215-898-9348    

sip:blairs@upenn.edu

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

-- 
  
ISC Network Engineering
The University of Pennsylvania
3401 Walnut Street, Suite 221A
Philadelphia, PA 19104  


voice: 215-573-8396 

       215-746-8001

fax: 215-898-9348    

sip:blairs@upenn.edu

Steve can you post your Cisco configs?  Can you post the configs from your * 
box that pertain to your issue?


----- Original Message ----- 
From: "Steve Blair" <blairs@isc.upenn.edu>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users@lists.digium.com>
Sent: Wednesday, March 16, 2005 9:35 AM
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
>
> -- 
>  ISC Network Engineering
> The University of Pennsylvania
> 3401 Walnut Street, Suite 221A
> Philadelphia, PA 19104
>
> voice: 215-573-8396
>       215-746-8001
>
> fax: 215-898-9348
> sip:blairs@upenn.edu
>
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users

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@tellink.com


-----Original Message-----
From: Steve Blair [mailto:blairs@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