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Re: CE-CE MTU Problem ...

  • From: Garry Glendown <garry@regio.net>
  • Date: Thu, 07 Oct 2004 10:25:54 +0200
  • CC: Mansoor Khan <MKHAN@qtel.com.qa>, mpls-ops@mplsrc.com
  • Resent-Date: Thu, 7 Oct 2004 04:57:41 -0400
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Addendum: I put ip tcp adjust-mss 1300 on the customer router - the 
destination CE router shows incoming packets of size 1340 (which is 
correct) - therefore I think I shoudl be able to rule out an actual MTU 
problem ...

The FTP transfer now looks like this - I get the connection, the 
transfer starts with a couple dozen of packets being transfered, then I 
get nothing for a minute or so, upon which the transfer continues for 
another batch of packets, then freezes, etc ... I've known this behavior 
from MTU problems before, but with a packet size of 1340 this shouldn't 
be the cause ...

Could there be another problem involved? Behind the CE router, our 
customer has a Checkpoint FW (IIRC), could it be a reassemble problem?

Any ideas?

Tnx, -garry

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