pmtud problem
Eli Dart
dart at es.net
Tue Feb 13 17:27:11 UTC 2007
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Stephen Clark wrote:
> if the pc sends a packet of 1460 bytes with the DF bit set shouldn't the
> freebsd 4.9 system
> send back an icmp dest unreachable - fragmentation needed and DF bit set?
Are you blocking icmp with a firewall filter?
--eli
> $ sysctl -a | grep mtu
> net.inet.tcp.path_mtu_discovery: 1
>
> Now if I change the mtu of the gre to 1412 everything works.
>
> Any insight would be appreciated.
>
> Thanks,
> Steve
- --
Eli Dart Office: (510) 486-5629
ESnet Network Engineering Group Fax: (510) 486-6712
Lawrence Berkeley National Laboratory
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