RE: [nsp] MPLS TE

From: Matt Ryan (Matt.Ryan@telewest.co.uk)
Date: Thu Jun 06 2002 - 06:46:02 EDT


It would probably be worth testing both TE LSP's individually to check both
the LSP's are set-up correctly (Giles suggestion) and that there is not an
MTU issue on just one of the links (my thought).

Matt.

-----Original Message-----
From: Giles Heron [mailto:giles@packetexchange.net]
Sent: 06 June 2002 11:31
To: Matt Ryan
Cc: 'Duane de Witt'; 'cisco-nsp@puck.nether.net'
Subject: RE: [nsp] MPLS TE

the other possibility is broken forwarding in the LSP from the
destination back to the source.

"normal" traffic may be able to pop out of the tunnel and then be routed
hop-by-hop, whilst VPN traffic of course will be discarded as the
destination IPs are unknown at the core LSRs.

I have seen this in the past with TDP LSPs.

In fact the first thing to check is that there are LSPs in the reverse
direction ;-)

Giles

On Thu, 2002-06-06 at 08:40, Matt Ryan wrote:
> MTU issue as the label stack grows?
>
>
> Matt.
> -----Original Message-----
> From: Duane de Witt [mailto:duane@uis.co.za]
> Sent: 06 June 2002 08:24
> To: 'cisco-nsp@puck.nether.net'
> Subject: [nsp] MPLS TE
>
>
> Hi Everyone
>
> Has anyone come across a problem where when using multiple paths to a
> destination with TE any traffic within a VRF doesn't get any return
packets?
>
> I have two TE tunnels going from one router to another using different
> paths. Any normal traffic works fine, but as soon as I put the traffic in
a
> VRF I can see the icmp packets hit the destination and I can see the
return
> packets been sent, but they never reach the source router.
>
> Thanks
>
>
> Regards
>
> Duane de Witt
> Siemens Business Services
> Tel. +27 11 652 7613
> Fax. +27 11 652 2018
>
>
>
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Giles Heron    Principal Network Architect    PacketExchange Ltd.
ph: +44 7880 506185              "if you build it they will yawn"
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