[Click] Path MTU discovery

[David Biot]

Hello,

I am having some problems with path MTU discovery with a click router.

In this router I fragment and defragment IP-packets. I have a IPFragmenter
element that issues a ICMPError-message when a packet arrives that is too
big and has the don't fragment bit up. This ICMP-message is configured as
ICMPError(WAN1, 3, 4, PMTU 1400, MTU 1400), but still when I try running
iperf to test the router, I get 536 as the MTU and not the 1400 I
configured. Is there something else I need to do to ensure path MTU
discovery works?

With regards,
David Biot

No virus found in this outgoing message.
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Version: 7.5.476 / Virus Database: 269.9.10/873 - Release Date: 26/06/2007
23:54