[Bug 2085018] Re: Commit "net/mlx5e: Don't offload internal port if filter device is out device" breaks OpenStack/OVN distributed gateway use case

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: linux (Ubuntu)
Status: New => Confirmed

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/2085018

Title:
Commit "net/mlx5e: Don't offload internal port if filter device is out
device" breaks OpenStack/OVN distributed gateway use case

Status in linux package in Ubuntu:
Confirmed

Bug description:
Consider a topology with two chassis, A and B:
* A acts as a distributed gateway connected to provider network on tagged VLAN and has GENEVE tunnel configured towards chassis B.
* B hosts the target instance.
* From a third machine connected to the provider network we can observe:
  * Only first ICMP ECHO reply from target instance is forwarded.
  * Attempt to establish TCP connection fails.

If we revert commit [0] the symptoms disappear.

The issue is also present in the most recent mainline version
available, so there does not appear to exist a fix for the issue.

0: 06b4eac9c4be ("net/mlx5e: Don't offload internal port if filter
device is out device")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2085018/+subscriptions