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Re: IP Routing problem after enabling MPLS?

  • From: Garry Glendown <garry@regio.net>
  • Date: Wed, 22 Sep 2004 16:07:55 +0200
  • Resent-Date: Wed, 22 Sep 2004 10:46:28 -0400
  • User-Agent: Mozilla Thunderbird 0.8 (Windows/20040913)

Garry Glendown wrote:
> 08:26:08.241047 customer.23603 > server.ftp: S 1279761092:1279761092(0)
>     win 5840 <mss 1432,sackOK,timestamp 26381662 0,nop,wscale 1>
>                       ^^^^
> 
> Why is mss set/forced to this just because MPLS routing is active? Also, 
> changing the mss-adjust to anything else still results in the mss of 
> 1432 arriving at the server ... !? Is this documented behaviour?

OK, another mystery - the customer who's been bugging me now for the 
last couple days still had problems - checking the connections initiated 
from him, I found that all the connections were opened with mss 1452, 
ignoring the settings from the template, as well as not being modified 
by the other mss of 1432 --- I had to update their MTU to 1492, which 
finally got them to work again ...

Does everybody have problems like this with MPLS???

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