[SR-Users] reply code for lower cseq

[Daniel-Constantin Mierla]

Hello,

thanks, I found that as well, but I didn't wanted to believe is no 
update to it in regard to sip client behavior. A phone replying with 
such generic code is really misleading for such case . So I searched 
further in 4xx class, base rfc and other extensions, and could not find 
anything.

Cheers,
Danie

On 4/24/12 2:17 PM, Andrew Pogrebennyk wrote:
> Hi Daniel,
> See RFC 3261 section 12.2.2:
>
>     If the remote sequence number was not empty, but the sequence number
>     of the request is lower than the remote sequence number, the request
>     is out of order and MUST be rejected with a 500 (Server Internal
>     Error) response.
>
> However, 400 or some 4xx response would seem more reasonable to me, to
> let the UAC know it just did something wrong.
> And I'm not the only one:
> http://comments.gmane.org/gmane.ietf.sip-implementors/8970
>
> On 04/24/2012 02:10 PM, Daniel-Constantin Mierla wrote:
>> Hello,
>>
>> I was wondering if someone here can point quickly where specs mention
>> what is the right reply code to send when a request within dialog is
>> received with lower cseq value than the previous request. I couldn't
>> spot the part in the RFC yet, if any related exists.
>>
>> Cheers,
>> Daniel
>>

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda