Re: Local interface failure detection by SCTP.

Prathap,

See the SCTP I-G discussed on TSVWG.  It includes some advise on
controlling the source address for user-space implementations.

--brian

Prathap T wrote:                                                   (Sat, 10 Dec 2005 00:38:05)
> 
>    How  should  SCTP  detect  Local  interface  failure  assuming SCTP is
>    implemented in the user space.
> 
> 
> 
>    For ex:
> 
>       Assume there is Endpoint A, Endpoint B
> 
>       Endpoint A has interface A1, A2.
> 
> 
> 
>        Endpoint B has interface B1, B2.
> 
> 
> 
> 
> 
>       Endpoint  A,  communicates  to B using it's local interface A1. Now
>    when A1 goes down,
> 
>      how does A, get to know this??
> 
> 
> 
>       This can be a problem, when A sends out heartbeat with source as A1
>    and destination as B1.
> 
>      ( I think IP sends this out on A2 with source as A1)
> 
>      and the endpoint B responds with an HBeatAck with destination as A1,
>    which is no more existing.
> 
> 
> 
>      Now since A did not receive HBeatAck from B, it will consider B1 not
>    reachable after some retries.
> 
>       This  can  be  a real problem when HBeat Interval time of B is very
>    high  and HBeat  interval  of  A is low. This can lead to breakdown of
>    association.
> 
> 
> 
>        So,  what  is  the  mechanism  SCTP  has to employ to detect Local
>    failure.
> 
> 
>    Regards,
> 
>    Prathap.

> _______________________________________________
> Sigtran mailing list
> [email protected]
> https://www1.ietf.org/mailman/listinfo/sigtran


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