The MPLS WG Archive

[Adrian Farrel <adrian@olddog.co.uk>]

George,

Great to have some direction on this. Thanks.

One point from what you write...

According to RFC3209 what is the correct behavior of an upstream LSR when it receives a
PathErr?Should it:
- forward the message but retain Path and Resv state
- forward the message and retain Path state but discard Resv state
- forward the message and retain no state
- something else.
References would help.

Thanks,
Adrian


----- Original Message ----- 
From: "George Swallow" <swallow@cisco.com>
To: "Adrian Farrel" <adrian@olddog.co.uk>
Cc: "Matthew R. Meyer" <mmeyer@gblx.net>; "Matthew Meyer" <mrm@gblx.net>; "'mpls@uu.net'"
<mpls@UU.NET>; <swallow@cisco.com>
Sent: Monday, May 10, 2004 9:17 PM
Subject: Re: I-D ACTION:draft-ietf-mpls-soft-preemption-02.txt


> This thread has been quite for some time.  I'd like to see where the
> workgroup is.
>
> Also, as the primary author of RFC3209 I like to state that I believe
> the RFC defines hard prememption, since it says one should send a RESV
> Err message and doesn't say anything about setting the InPlace bit
> (which I consider to be an exception that would need to be called out).
> Further there is no discussion of
>
>    a) lowering the forwarding priority
>    b) how long to allow the situation to persist if the Source of the TE
>       takes no corrective action.
>
> However, I will take a mea culpa on the draft being less than completely
> clear.
>
> > But, if the WG is happy with the existing situation and drafts that is
> > fine (although someone should write a BCP to ease the interpretation
> > of RFC3209).
>
> I don't think a BCP is needed, but any new RFC we produce will need to
> include an applicability statement which includes the consensus
> interpretation of RFC3209.
>
> So the question is, as Adrian put it, is "the WG is happy with the
> existing situation and drafts"?
>
> ...George
>
> ========================================================================
> George Swallow             Cisco Systems                  (978) 936-1398
>                            1414 Massachusetts Avenue
>                            Boxborough, MA 01719
>
>
>