Public bug reported:
[Impact]
The issue I'm seeing is that if I have multiple OVN routers connected to the
same external OVS uplink switch (which in turn is connected via veth to a
native linux bridge), when NDP solicit packets are sent from the native linux
bridge into the logical OVN switch, for some reason every OVN router that is
connected to the OVN switch retransmits the NDP packet from its own MAC
address. Which in turn causes them all to receive another NDP packet, which are
then all retransmitted (a flood then ensues until OVS rate limiting takes
effect).
This occurs even for IPs that do not exist on the network that the OVN
routers dont know anything about.
It doesn't happen for ARP, nor does it occur in Groovy.
[Test Case]
[Regression Potential]
[Other Info]
** Affects: ovn (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1896938
Title:
strange IPv6 NDP behaviour with OVN on Focal
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