[ovs-discuss] Configuring MTU for dpdk and vhost ports
Kavanagh, Mark B
mark.b.kavanagh at intel.com
Tue Sep 27 15:17:01 UTC 2016
>
>Hi,
>
>Is there a way to configure MTU for dpdk and vhost ports from its default 1500 ?
>I read, "with OVS, Normally the MTU should be changed using operating system specific
>interfaces (e.g. ifconfig).", but as they are dpdk ports, how can i configure them ?
>
Hi Kapil,
Depending on the version of OvS that you're using, you may use the Interface's 'mtu_request' field to modify the MTU of DPDK-type ports.
From INSTALL.DPDK-ADVANCED.md:
"By default, DPDK ports are configured with standard Ethernet MTU (1500B). To
enable Jumbo Frames support for a DPDK port, change the Interface's `mtu_request`
attribute to a sufficiently large value.
e.g. Add a DPDK Phy port with MTU of 9000:
`ovs-vsctl add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk -- set Interface dpdk0 mtu_request=9000`
e.g. Change the MTU of an existing port to 6200:
`ovs-vsctl set Interface dpdk0 mtu_request=6200`"
This functionality is currently supported on OvS Master and 2.6 branches.
Hope this helps,
Mark
>Regards
>Kapil
More information about the discuss
mailing list