Subject: LSP preemption

From: Gopalkrishna Panicker <[email-masked]>
Date: Mon, 20 Jan 2003 10:01:21 -0800 (PST)

Hi,

I have a couple of questions on the setup/holding
priority and its use in RSVP-TE.

Consider the following network

     A-----B-------C--------D
           |                |
           |-------E--------|

Assume for a given session (Sess1) we have two senders
S1(ero = ABCD) and S2(ero = ABED). Say SE style is
used.

Now assume another session (Sess2) is being set up
from
A to D with a sender S3(ero=ABED). During the session
(Sess2) setup node B discovers that bandwidth on the
link BE is insufficient.

If Sess2 has a higher priority (determined after
appropriate validation of both setup and holding pri)
will it result in both senders (S1 and S2) of Sess1
being bumped or will only S2 get bumped ?

>From the mailing list I gather that there are benefits
to associating setup and holding priority to a
LSP. If they are maintained on a per LSP basis, then
can one LSP bump another from the same session ?

Thanks

Cheers,
Gopal

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