Ubuntu
linux package

  1. Bug #1983468
  2. Comment #17

Comment 17 for bug 1983468

Revision history for this message
Dmitrii Shcherbakov (dmitriis) wrote : Re: Octavia amphora loadbalancer gets stuck at PENDING_CREATE status

There is a 3-rd party reference to the issue with checksumming but it does not pinpoint a particular limitation in either HW or OVS but recommends disabling checksumming (which also means TSO won't work as checksumming is a prerequisite):

https://supportportal.juniper.net/s/article/NFX-SSH-traffic-to-Ubuntu-VNF-Fails-Possibly-Due-to-TCP-Checksum-Error?language=en_US

OVS lists some limitations when it comes to the userspace datapath & TSO on tunnels which we are not relying on in this case:

https://docs.openvswitch.org/en/latest/topics/userspace-tso/#limitations

Looks like further exploration is needed to see where to understand where the issue with TX checksumming is: i.e. whether it's the OVS system datapath or a particular device/driver that's causing this problem.