Re: RFC 4666 on Signaling System 7 (SS7) Message TransferPart 3 (MTP3) - User Adaptation Layer (M3UA)

"Brian F. G. Bidulock" <[email protected]> Thu, 21 Sep 2006 07:29:38 -0600

Newsgroups	gmane.ietf.sigtran
Organization	http://www.openss7.org/
Message-ID	<[email protected]>

Tolga,

Tolga Asveren wrote:                             (Thu, 21 Sep 2006 09:23:15)
> 
> Changeover mechanism is not to address host failures because when a host is
> down, it can't tell anything about the last received message etc...

Changeover addresses link failure, where link failure is defined as
any time at which MTP Level 3 receives link failure indication from
a signalling links, which includes adjacent signalling point failure.
Look at the diagrams.

Besides, the introduction to:

 http://www.ietf.org/internet-drafts/draft-bidulock-sigtran-corid-04.txt

illustrates this well, I think.

--brian

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