[Bug 1957817] Re: Multicast traffic is broken between VMs on different hypervisors using provider networks
Robie Basak
1957817 at bugs.launchpad.net
Wed Mar 2 16:17:03 UTC 2022
Still awaiting SRU information please.
** Changed in: ovn (Ubuntu Focal)
Status: In Progress => Incomplete
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https://bugs.launchpad.net/bugs/1957817
Title:
Multicast traffic is broken between VMs on different hypervisors using
provider networks
Status in Ubuntu Cloud Archive:
Fix Released
Status in Ubuntu Cloud Archive ussuri series:
New
Status in ovn package in Ubuntu:
Fix Released
Status in ovn source package in Focal:
Incomplete
Bug description:
In an OpenStack Ussuri (both Focal and Bionic) cloud we discovered
that multicast traffic would fail between VMs on different hypervisors
and when using provider networks. The following table reflects what
we found works/didn't work:
https://paste.ubuntu.com/p/QZZBjrTSFQ/
Based on this, I went looking at relevant changes upstream and found
that this appears to have been fixed upstream, but not backported to
OVN 20.03:
https://github.com/ovn-
org/ovn/commit/97778ab3e422ac071faa67f9f477fd54977e9c04
I backported this patch to the version of OVN in Ussuri here:
https://launchpad.net/~elmo/+archive/ubuntu/sf322809
These patched packages have been tested on a customer site and
confirmed to fix the problem.
I've attached the patch from the PPA for convenience.
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