The MPLS WG Archive

["Sharma, Prem" <p_sharma@trillium.com>]

Title: RE: RE: Valid Race Condition related to draft "draft-ietf-mpls-crlsp -modify-03.txt"

Hi Don,

 

I feel, the requirement that CRLSP modification procedures described in the 

draft, are applicable to strictly routed LSPs only, is a MAJOR requirement.

This is just not there in the draft. Do you folks want to address this in the

next revision of the draft?

 

One more thing, in my opinion, nothing precludes that modifications should not be

allowed on loosely routed hops. There could be a requirement. This is a different

case that current draft doesn't address that.

 

Thanks.

Prem

-----Original Message-----
From: Don Fedyk [mailto:dwfedyk@nortelnetworks.com]
Sent: Friday, April 13, 2001 8:21 AM
To: Loa Andersson
Cc: Sharma Prem; manoj juneja; mpls@UU.NET
Subject: RE: RE: Valid Race Condition related to draft "draft-ietf-mpls-cr lsp -modify-03.txt"

Loa

The draft was targeted for strictly routed LSP ingress to egress
that are generated by constraints. The function it provide is
defining the behavior of TLVs defined to correlate the paths
attributes. The downstream nodes recognize this as a path
request for the same LSP, with changed attributes, allowing path
processing to continue where it might otherwise be aborted.
Your solution below yields non optimal paths in many cases
and provides the motive for the draft. The paths share LSPid.

Don

> -----Original Message-----
> From: Loa Andersson [mailto:loa.andersson@utfors.se]
> Sent: Thursday, April 12, 2001 10:04 AM
> To: Fedyk, Don [BL60:2868:EXCH]
> Cc: Sharma Prem; manoj juneja; mpls@UU.NET
> Subject: Re: RE: Valid Race Condition related to draft
> "draft-ietf-mpls-crlsp -modify-03.txt"
>
>
> Don,
>
> do I understand you correctly that the draft is applicable only in
> the situation where you have a strictly routed LSP ingress to egress?
> If so I rest my case, but I also fail to see why we need the draft.
> Just "locally" set up your alternate paths, signal that the traffic
> will be sent on the new path, switch over the traffic and tear the
> old path down. Nothing modificational (is ther such a word?) about
> it.
>
> /Loa
>
> ----- Original Message -----
> > Loa, Sharma, Manoj:
> >
> > Let me see if I can clarify my position on this.
> > My mail has been backed up lately. Sorry for the delay.
>
> > > --
> > > Loa Andersson
> > > Chief Architect,
> > > Utfors Research, Architecture and Future Lab (URAX)
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> > > Råsundavägen 12
> > > Box 525, 169 29 Solna
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> > > Email           loa.andersson@utfors.se
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> > >
> >
>
>