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RE: IP Routing problem after enabling MPLS?

  • From: "Gupta, Shailendra" <Shailendra.Gupta@hk.mci.com>
  • Date: Wed, 15 Sep 2004 15:59:27 +0800
  • Resent-Date: Wed, 15 Sep 2004 04:40:39 -0400

Title: RE: [MPLS-OPS]: IP Routing problem after enabling MPLS?

What are trace results, does it show any ambiguty(with MPLS enabled)? I trust you have increased the MTU on all  ports that fall in the path[including switch]. As such, MTU problem normally affect some specific services but not all.

Shail



-----Original Message-----
From: Garry Glendown [mailto:garry@regio.net]
Sent: Wednesday, September 15, 2004 1:00 PM
To: mpls-ops@mplsrc.com
Subject: [MPLS-OPS]: IP Routing problem after enabling MPLS?


An interesting thing just happened ... :(

I enabled MPLS on several routers, without setting anything specific ...
(i.e., just added "mpls ip" on some necessary interfaces on the way
between a dialup router and a PE->CE router). Everything seemed to work
out fine, and labels being distributed correctly. Anyway, one of our
uplinks started giving me trouble, with connections/routings as such
working, but severely degraded performance (telnet to ebay.com e.g.
would connect, a GET / would take a minute or more with only occasional
blocks of data transfered) - after disabling MPLS on that router (which
wasn't really necessary anyway), everything worked fine again ... when I
re-enable MPLS on its GigE, the delays are there again ... increasing
the MTU to 1512 doesn't help, either ... (switch backplane is 35/29
series switches, routers involved in the local ethernet are a 12k and 72
series w/ GigE PAs)

Any idea?

Tnx, -gg

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