Question

Enable TCP Checksum Offload in RHEL - Intel Pro/1000 Gigabit NIC

Asked by: jdustinb

I'm trying to enable TCP checksum offload in Red Hat Enterprise Linux on an Intel Pro/1000 Gigabit NIC.

Is this possible? If so, parameters?

The card itself supports TCP/IP Checksum Offload, and I read that setting XsumRX to a value of 1 will enable IP checksum offload, but this still leaves me trying to enable checksum offload for the TCP stack as well...

XsumRX
"A value of '1' indicates that the driver should enable IP checksum offload for received packets (both UDP and TCP) to the adapter hardware."

Kudos to anyone who can get this.

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Asked On
2005-11-23 at 20:07:56ID21641866
Tags

checksum

,

linux

,

offload

,

tcp

Topic

Linux Networking

Participating Experts
1
Points
500
Comments
5

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Answers

 

by: giltjrPosted on 2005-11-25 at 18:19:11ID: 15363415

Is there any special reason you want to do this?

Have you tried:

     insmod e1000 XsumRX=1

This  enables the only checksum offload that the card supports.

 

by: jdustinbPosted on 2005-11-30 at 17:02:14ID: 15393173

I'm trying to optimize performance by having ToE do the TCP/IP processing.

So it is my understanding that this NIC does not support TCP checksum offload?

 

by: giltjrPosted on 2005-11-30 at 20:45:20ID: 15394111

It supports IP checksum offload for both TCP and UDP.  You may want to read up on this as most people beleive that this offload is not really doing a whole lot of good.

20120131-EE-VQP-002

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