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TCP Fragments - Reassembled PDU

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TCP Fragments - Reassembled PDU - 6.Jul.2006 8:39:06 PM

jens@compcond.com

Posts: 3
Joined: 12.Jul.2005
From: Panorama City, CA
Status: offline

I'm publishing a Lotus Domino server behind ISA 2004 using TCP port 1352 which is the default for the Notes client.

I'm experiencing a lot of fragmented packages on the WAN interface.
I have changed my MTU on that adapter to 1472 after using ping -f - l to find the highest value.

When using Etheral to analyze the captures from the network monitor I see a lot of theese

[TCP segment of a reassembled PDU]

we do seem to have some problems replicating the Notes databases.

Any ideas anyone????

Jens

Post #: 1

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RE: TCP Fragments - Reassembled PDU - 7.Jul.2006 1:17:55 AM

ClintD

Posts: 1833
Joined: 26.Jan.2001
From: Keller, TX
Status: offline

Have you deleted or set the EnablePMTUDiscovery registry key to 1?

HKLM\System\CurrentControlSet\Services\Tcpip\Parameters

ISA sets this to 0 upon install and effectively makes ISAs MTU 576 - this is how I usually see Ethereal reassemble these smaller packets.

(in reply to jens@compcond.com)

Post #: 2