Re: Clarification On SCTP SSN And TSN

"Brian F. G. Bidulock" <[email protected]>
Newsgroups gmane.ietf.sigtran
Organization http://www.openss7.org/
Message-ID <[email protected]>
Saraswati,

Saraswati Bose wrote:                                                            (Tue, 25 Oct 2005 04:27:08)
> 
>    Hi Brian,
> 
>                Check the below scenario related to SCTP TSN and SSn filed
>    values and suggest.
> 
> 
> 
>    Transmission mode:Ordered Delivery
> 
>    Client                                  Server
> 
>    DATA CHUNK-1----------------->
> 
>    SSN=1, TSN=1
> 
>            <-------------------------------SACK Chunk Cum_TSN_ACK=1
> 
>    DATA CHUNK-2----------------->
>    SSN=1, TSN=3

               <-------------------------------ABORT
	       (duplicate SSN in same Stream)

This is a valid reply.  There are others.

--brian

>              <-------------------------------SACK   Chunk  Cum_TSN_ACK=1,
>    Gap_Block=1(for TSN=2
> 
>                                              missing)
> 
>    DATA CHUNK-2----------------->
>    SSN=2, TSN=2
>            <-------------------------------SACK    Chunk   Cum_TSN_ACK=?,
>    Gap_Block=?.
> 
>    --Saraswati.

-- 
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/
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