Hi,

The ‘mtu’ field of the Interface table is a read-only field in OVSDB, hence it 
can’t be set via a call to ovs-vsctl.

Work is currently underway to provide a mechanism to modify netdev parameters 
dynamically at runtime; such parameters could include # RX queues, MTU, etc. 
See here: http://openvswitch.org/pipermail/dev/2016-April/069835.html

In the meantime, if you’d like to play around with Jumbo frames and OVS-DPDK, 
you can use this patchset: 
http://openvswitch.org/pipermail/dev/2016-February/066405.html.
Note, however, that this patchset is superseded by the aforementioned ‘dynamic 
netdev reconfigure’ series, and will not form part of the OVS codebase.

Thanks,
Mark

From: discuss [mailto:discuss-boun...@openvswitch.org] On Behalf Of 
307419...@qq.com
Sent: Wednesday, April 20, 2016 6:28 AM
To: discuss
Subject: [ovs-discuss] hi,all,can the mtu of interface with dpdk type be set by 
ovs command line ? thanks.

I have test with the command: ovs-vsctl set interface *** mtu=***.
but the mtu of the interface always be 1500, why?

or there are any other methods to set the mtu of dpdk-type interface?

best regards

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