[Openstack] changing MTU setting not working

kamalakannan sanjeevan chirukamalakannan at gmail.com
Thu Nov 10 17:20:03 UTC 2016


Satish,

You can try restarting all Nova and neutron services.

Kamal

On 10-Nov-2016 10:44 pm, "Satish Patel" <satish.txt at gmail.com> wrote:

> We have multi-node cluster and i am trying to change MTU setting of
> qrouter but it doesn't working.
>
> default MTU setting on neutron router interface is 1450 MTU  i want to
> change to 1500
>
> [root at controller neutron(keystone_admin)]# ip netns exec
> qrouter-b17c9641-27f7-4328-82b0-c3132cccdcf1 ifconfig | grep mtu
> ...
> qr-edb341ca-ac: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
>
>
> I have changed following file
>
> neutron.conf   ->  global_physnet_mtu = 1550
> ml2_conf.ini    ->  path_mtu = 1550
>
> and restarted following services
>
> systemctl restart neutron-openvswitch-agent
> systemctl restart neutron-l3-agent.service
> systemctl restart neutron-server.service
>
>
> Now i am creating new router and attaching subnet but still its using
> 1450 MTU what is the solution for it? do i need to reboot BOX??
>
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