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Re: [manet-dlep-rg] Peer termination

Teco Boot <teco@inf-net.nl> Mon, 11 November 2013 18:14 UTC

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From: Teco Boot <teco@inf-net.nl>
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Date: Mon, 11 Nov 2013 19:13:58 +0100
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To: Stan Ratliff <sratliff@cisco.com>
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Cc: "DLEP Research Group (manet-dlep-rg@ietf.org)" <manet-dlep-rg@ietf.org>
Subject: Re: [manet-dlep-rg] Peer termination
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Op 11 nov. 2013, om 18:34 heeft Stan Ratliff (sratliff) <sratliff@cisco.com> het volgende geschreven:

> 
> On Nov 11, 2013, at 11:19 AM, Teco Boot <teco@inf-net.nl>
> wrote:
> 
>> 
>> Op 11 nov. 2013, om 01:55 heeft Stan Ratliff (sratliff) <sratliff@cisco.com> het volgende geschreven:
>> 
>>> Oh, and on termination:  I'm not removing the "Peer Terminate". Yes, a session can be brought down via TCP FIN. But, you can also announce it with a Peer Terminate. Gives a more orderly way to clean everything up, IMO.
>> 
>> It doesn't add anything, other than more messages, more state, more code and more bugs.
>> What am I missing?
> 
> The ability for one side of the DLEP connection to tell the other *why* things are going down. 

I think a "Peer Down" message makes sense. This is very different than terminating a DLEP session, in that the latter would not indicate peers are no longer accessible. A "Peer Down" has an implicit meaning that all Destinations are down. Closure of DLEP TCP connection would not indicate such.

Maybe use a generic Peer Error message, as notification. Could be send before TCP connection teardown.

Teco

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