Public bug reported: The "large receive offload" functionality of some NICs is not compatible with packet forwarding, because it modifies incoming packets in an irreversible way so the packets can't be correctly forwarded across the bridge. When an interface is added to a bridge, the kernel automatically disables LRO via dev_disable_lro(), however in trusty this only works for normal interfaces (or vlan/macvlan) added to a bridge. When interfaces belong to a bond, and the bond is added to a bridge, the interfaces' LRO is not disabled, and (some) incoming packets are modified by LRO and then lost when passing through the bridge.
Commit fbe168ba91f7c327856f205699404284c2f09e36 updates dev_disable_lro() to work for all types of interfaces, including bonds. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Dan Streetman (ddstreet) Status: In Progress ** Tags: sts ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Dan Streetman (ddstreet) ** Changed in: linux (Ubuntu) Status: New => Fix Released ** Changed in: linux (Ubuntu) Status: Fix Released => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1547680 Title: bonded interfaces in bridge do not have LRO turned off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1547680/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs