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Hello,
On Wed, 2 Dec 2009, Scooter Morris wrote:
> OK, I've spent a bunch of time looking at this in more detail, and it
> looks like I've got an MTU/ICMP problem. Here is a tcpdump between a
> client and the cluster taken from the client:
Can you add these options to tcpdump on LVS box
and on client: -s120 -X -vvv because it is interesting to
see the packet length for the TCP packet with 1448 bytes of data
and the embedded ICMP data for this packet, so showing both
the TCP + ICMP packets is enough (on client and on director).
Also, it is interesting to know the type of incoming interface
and especially the OS model/version of client box (eg. Linux
kernel version).
> 19:09:42.504176 IP client.46508 > cluster.ssh: . 98814:100262(1448) ack
> 2318 win 190 <nop,nop,timestamp 1066530714 96022516>
> 19:09:42.504528 IP cluster > lclient: ICMP cluster unreachable - need to
> frag (mtu 1500), length 556
> 19:09:42.704792 IP client.46508 > cluster.ssh: . 97366:98814(1448) ack
> 2318 win 190 <nop,nop,timestamp 1066530915 96022516>
> 19:09:42.705142 IP cluster.ssh > client.46508: . ack 98814 win 501
> <nop,nop,timestamp 96022717 1066530915>
> 19:09:42.705162 IP client.46508 > cluster.ssh: . 98814:100262(1448) ack
> 2318 win 190 <nop,nop,timestamp 1066530915 96022717>
> 19:09:42.705171 IP client.46508 > cluster.ssh: . 100262:101710(1448) ack
> 2318 win 190 <nop,nop,timestamp 1066530915 96022717>
> 19:09:42.705528 IP cluster > client: ICMP cluster unreachable - need to
> frag (mtu 1500), length 556
Regards
--
Julian Anastasov <ja@xxxxxx>
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