Public bug reported: Neutron's MTU computation assumes 50 bytes overhead for VXLAN. This is correct for IPv4, but in the case of IPv6 the the overhead is 70 bytes. Similar assumptions are made for GRE and Geneve tunnels.
Additionally 802.1q tags could increase overhead by 4. See: http://keepingitclassless.net/2014/03/mtu-considerations-vxlan/ ** Affects: neutron Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1533341 Title: Neutron MTU overhead computation assumes IPv4 Status in neutron: New Bug description: Neutron's MTU computation assumes 50 bytes overhead for VXLAN. This is correct for IPv4, but in the case of IPv6 the the overhead is 70 bytes. Similar assumptions are made for GRE and Geneve tunnels. Additionally 802.1q tags could increase overhead by 4. See: http://keepingitclassless.net/2014/03/mtu-considerations-vxlan/ To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1533341/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
