[SOLVED] MTU

nomad44 · 08-11-2011, 06:24 PM

How do I force ip packets to be always less than MTU and avoid fragmentation.

acid_kewpie · 08-12-2011, 02:08 AM

can you detail your problem better please? A system will not allow itself to send packets smaller than it's own MTU. the MSS value for TCP is also often used to define packet sizes on TCP.

nomad44 · 08-12-2011, 06:19 PM

After the upgrade of our server, ip packets going down to link layer from tcp stack got lot bigger than mtu.
This caused a significant slow down on client side due to server getting faster.

I was able to solve it by turning off the generic segmentation offload (gso) for the eth interface and slowing down the server.

Thanks