XenServer 8.2 TCP Offloading

[Klaus Winnerlein]

Hello,

 

in XenServer 7.1 and former releases we always set TCP offlaoding on pif's and vif's.

 

For example for every vif we set

        xe vif-param-set uuid=$uuid other-config:ethtool-gso="off"
        xe vif-param-set uuid=$uuid other-config:ethtool-ufo="off"
        xe vif-param-set uuid=$uuid other-config:ethtool-tso="off"
        xe vif-param-set uuid=$uuid other-config:ethtool-sg="off"
        xe vif-param-set uuid=$uuid other-config:ethtool-tx="off"
        xe vif-param-set uuid=$uuid other-config:ethtool-rx="off"

And for every pif we set

       xe pif-param-set uuid=$uuid other-config:ethtool-gso="off"
        xe pif-param-set uuid=$uuid other-config:ethtool-ufo="off"
        xe pif-param-set uuid=$uuid other-config:ethtool-tso="off"
        xe pif-param-set uuid=$uuid other-config:ethtool-sg="off"
        xe pif-param-set uuid=$uuid other-config:ethtool-tx="off"
        xe pif-param-set uuid=$uuid other-config:ethtool-rx="off"

With this settings we had an observably performance effect on the VMs.

Now my question:

Is it still recommended for XenServer 8.2 to set TCP offloading on vif's and pif's ?

 

Thanks for any help,

Klaus
 

[Tobias Kreidl]

It's still an option. See p. 254 in this document: https://docs.citrix.com/en-us/citrix-hypervisor/citrix-hypervisor-8.2.pdf

Probably best to test with and without, if in doubt as to whether it makes a difference or not. It may also work or not, depending on what NICs and/or network drivers you have installed.

 

-=Tobias

[Mark Syms]

It might be an option but it was never recommended.