[c-nsp] Turning on MPLS.

[Mark Tinka]

On Monday 28 May 2007 12:48, Alex A. Pavlenko wrote:

> Most works fine, but some customers began to complain that
> they can not access certain sites in the Internet. I'm not
> sure but the situation looks like there is MTU mismatch
> somewhere.  Is it mandatory to check and adjust MTUs when
> turning on MPLS? No idea where to look else, please help.

You are probably looking for these 2:

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#c3
http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#c4

Aside, I had a similar issue when setting up MPLS switching to 
a 3640 that lived behind a 2950 (no jumbo frame support).

Moving that switch to a 3750 solved the problem. But I should 
note that I didn't try to fiddle with the interface, IP or 
MPLS MTU on the routers. The only time I set the MPLS MTU was 
when I enabled MPLS/VPN's.

Mark.
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