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cloudnull/jumbo-frames-convert.rst

Created March 2, 2016 18:26
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jumbo-frames-convert.rst

When converting to Jumbo Frames from a standard MTU the tap and tunnel devices on the compute and neutron agent nodes will need to be updated to use the new larger MTU. Tap devices and tagged interfaces will have an MTU of 1450 if they were created using an L3 network before the conversion to Jumbo frames was completed.

To adjust the MTU for these devices run the following command

ansible nova_compute:neutron_agent -m shell -a "for i in \$(ip a l  | grep 'mtu 1450' | awk -F':' '{print \$2}'); do ip link set dev \$i mtu 8950; done" --forks 50
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