Re: RFC3332: RC in DAVA Message

Madhavan,

Hope  SGW might have received the ERROR msg with "Invalid Routing
Context" but links should not go down.

--Samuel

  Alcatel USA, Inc.                  Internet: <userid>@ssd.usa.alcatel.com
  1000 Coit Road, Plano, Texas 75075
  ******* The opinions expressed are not those of Alcatel USA, Inc. *******

On Wed, 2 Nov 2005 [email protected] wrote:

> Hi Samuel,
> 
> Thanks for reply.Currently an error is generated for this parameter &
> links are set to unavailable.
> 
> But the definition for parameter in RFC states,
> 
> Parameter Length: 16 bits (unsigned integer)
> 
>       The Parameter Length field contains the size of the parameter in
>       bytes, including the Parameter Tag, Parameter Length, and
>       Parameter Value fields.  Thus, a parameter with a zero-length
>       Parameter Value field would have a Length field of 4.  The
>       Parameter Length does not include any padding bytes."
> 
> In this case, RC parameter is received complying to above. For this an
> ERROR is reported from AS as you have stated below. The links are
> unavailable due to this communication in loop.
> 
> Kind Regards,Madhavan
> 
> Samuel Dur D. Jeyaseelan wrote:
> 
> Madhavan,
> 
> pls see my comments inline.
> 
> --Samuel
> 
>   Alcatel USA, Inc.                  Internet: <userid>@ssd.usa.alcatel.com
>   1000 Coit Road, Plano, Texas 75075
>   ******* The opinions expressed are not those of Alcatel USA, Inc. *******
> 
> On Mon, 31 Oct 2005 [email protected] wrote:
> 
>   
> 
> Hi !!
> 
> I am currently involved in configuration of SGW to AS(doing this type of 
> configuration for first time) & need following clarification as I cannot 
> pick this out in clear way from RFC.
> 
> Scenario:
> 
> - AS sends DAUD to SGW without Routing Context
> - AS receives DAVA with routing context parameter.The contents are tag 
> id & length of the parameter without any value.In this case the length 
> is 4 bytes (2 bytes for tag id & 2 bytes for length field itself)
> 
> Question:
> 
> Since AS has not sent a RC in DAUD, i assume the field should not be 
> received in DAVA.Is my assumption inline with RFC ?
>     
> 
> RC is a 'conditional' parameter that means it is very much needed when an
> ASP serves more than one AS. In your case if the received RC does not find
> any match in the static or dynamic databases then it is appropriate to
> send an ERROR msg to SGW.
> 
>   
> 
> Thank you in advance,
> 
> Kind Regards,Madhavan
> 
> 
> 
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