You have been subscribed to a public bug: When OpenStack instances are connected to an external network, an ovn-etadata-namespace is created in each compute that has VMs attached to that network. Because the ovn-metadata namespace has interfaces with the same mac address in all computers, external switches might ARP query for the IP and receive multiple responses in different ports triggering network error alerts.
[ubuntu@sombrafam-bastion(kvm):~/internal_git/stsstack-bundles/openstack]$ sudo arping -c 1 10.5.150.0 ARPING 10.5.150.0 42 bytes from fa:16:3e:d3:10:01 (10.5.150.0): index=0 time=1.678 msec 42 bytes from fa:16:3e:d3:10:01 (10.5.150.0): index=1 time=2.143 msec --- 10.5.150.0 statistics --- 1 packets transmitted, 2 packets received, 0% unanswered (1 extra) rtt min/avg/max/std-dev = 1.678/1.911/2.143/0.232 ms Reproducer: https://paste.ubuntu.com/p/nbnhvTM9d4/ ** Affects: ubuntu-translations Importance: Undecided Assignee: Erlon R. Cruz (sombrafam) Status: Invalid ** Affects: ovn (Ubuntu) Importance: Undecided Status: Fix Released ** Affects: ovn (Ubuntu Focal) Importance: High Status: Fix Committed ** Affects: ovn (Ubuntu Hirsute) Importance: High Status: Fix Committed ** Affects: ovn (Ubuntu Impish) Importance: Undecided Status: Fix Released ** Tags: verification-done verification-done-focal verification-done-hirsute -- Duplicated ARP responses from ovnmetadata namespaces https://bugs.launchpad.net/bugs/1943266 You received this bug notification because you are a member of Ubuntu Translations Coordinators, which is subscribed to Ubuntu Translations. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-translations-coordinators Post to : ubuntu-translations-coordinators@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-translations-coordinators More help : https://help.launchpad.net/ListHelp