[Serusers] IPv6 to PSTN setup

[Jan Janak]

On 06-05 17:53, Lambros Lambrinos wrote:
> 
> Hi,
> I've been playing with the following setup:
> 
> ipv6 ua --- ser (v6) --- msp gateway --- ser (v4) --- cisco 3640 pstn gateway
> 						  --- cisco ip-phone
> 
> Everything works fine with the IP phone but routing the call
> to the PSTN gateway causes it to return a 400 Malformed/Missing Request
> in response to the packet forwarded to it from the ser(v4)
> 
> If i use the ip-phone to make a call via the pstn gateway
> (i.e. involving only the V4 SER) everything is fine.
> This makes me believe that the most likely cause of the crash
> is that the PSTN gateway can not understand the IPv6 address
> in the Via: or Record_Route: header fields (see packets below).

  My guess is that lr=on is the root of the problem, try to disable it:
  modparam("rr", "enable_full_lr", 0)

> It seems that a solution is to remove the entries
> with the IPv6 addresses at some point before sending the packet to
> the PSTN. Obviously, this information should be inserted back
> before the reply is forwarded to the entity initiating the call.
> 
> Where do people think is the best place to do that ?
> SER or the MSP gateway ?

  The best solution imho is not to do that. Try the modparam first and
  let me know if it doesn't help.

    Jan.