Re: [M3UA] Receving ASP ACTIVE in DOWN State

"Brian F. G. Bidulock" <[email protected]> Mon, 6 Jul 2009 06:07:46 -0600

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

Santhana,

Santhana wrote:                            (Mon, 06 Jul 2009 14:36:04)
> 	So if a DOWN Ack is sent back then the state can be corrected in the
> peer. In spite of it, if we send an ERROR message the peer may just log the
> error message. May not take a defined action based on this error. The Layer
> Management has to sense the error and correct the state somehow.

1. Any implementation that does not process ERROR messages is
   simply broken.  ERROR messages are not advisory: NOTIFY
   messages are advisory.

2. An ASP cannot distinguish an ASP DOWN ACK sent in this way
   fron the way in which it was intended (NIF failure).

3. The ERROR message identifies the message that was unexpected
   and the RC value of that message.

The ERROR message is the correct response to all messages in
the ASP DOWN state with the exception of the ASP UP and ASP
DOWN message.

--brian

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