XenServer 6.5 Disable TX checksum for pfSense 2.2

  • citrix xenserver

I just installed PFSense 2.2 as a VM on Xenserver 6.5 and the network performance was terrible. I have a 160Mbit connection and I was only able to get 5Mbit max. I found out that the solution was to disable the TX checksum on the hyper-visor side.

In XenServer console or SSH run this command to find your PFsense VM network VIF UUID’s:

[root@xen ~]# xe vif-list vm-name-label="<vm-name-here>"

Then type this command to disable the TX checksum:

xe vif-param-set uuid=<VIF-UUID-here> other-config:ethtool-tx="off"

Disable the TX checksum for each NIC attached to your pfSense VM.

Then Shutdown the VM. Do not just restart PFSense from console or SSH.

After I did this I was able to reach my full 160Mbit speeds instead of the measly 5Mbit I was previously getting!

Credit goes to the user tdslot on the Citrix Forums.


By |2016-12-03T20:30:11+00:00May 16th, 2015|XenServer|0 Comments

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