Re: [manet-dlep-rg] Peer termination

["Taylor, Rick" <[e-mail]>]

+1

Keep the Peer Terminate message.  Include a status value to differentiate between a normal and abnormal termination.

Status 0 = Ok - Normal shutdown, e.g. user turned off device
1 = Missing heartbeats
2 = Incompatible configuration

I'm guessing at status codes here, but it's an idea.

Obviously a terminate can come from either modem or router, and MUST be the last message.

I am not sure it is clear that the termination of a DLEP session implies that all destinations are no longer reachable.  No more DLEP metrics about those destinations, sure, but unreachable?

Rick Taylor

> -----Original Message-----
> From: [e-mail] [mailto:manet-dlep-rg-
> [e-mail]] On Behalf Of Teco Boot
> Sent: 11 November 2013 18:14
> To: Stan Ratliff
> Cc: DLEP Research Group ([e-mail])
> Subject: Re: [manet-dlep-rg] Peer termination
>
>
> Op 11 nov. 2013, om 18:34 heeft Stan Ratliff (sratliff)
> <[e-mail]> het volgende geschreven:
>
> >
> > On Nov 11, 2013, at 11:19 AM, Teco Boot <[e-mail]>
> > wrote:
> >
> >>
> >> Op 11 nov. 2013, om 01:55 heeft Stan Ratliff (sratliff)
> <[e-mail]> 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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