Any docker users out there? (MTU change)

[IamSpartacus]

I'm trying to change the MTU size of my docker containers to 9000 to use jumbo frames. From what I've read I need to add the following line to the /etc/defaut/docker file:

DOCKER_OPTS="--mtu=9000"

However, after doing that and restarting both the docker daemon service and the server entirely, it's not taking. Are there any docker users on here with experience with this? I'm sure I'm missing something small.

 

[Evan]

does the host OS use jumbo frames ok initially before you start and docker instances ?
Don't know a reason or solution, just narrow does if it's a host issue or strictly a docker issue.

 

[IamSpartacus]

does the host OS use jumbo frames ok initially before you start and docker instances ?
Don't know a reason or solution, just narrow does if it's a host issue or strictly a docker issue.

Yes, the host NIC is configured with jumbo frames and testing has shown it's working well.