** Description changed: - 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. + 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. + + Reproducer: https://paste.ubuntu.com/p/nbnhvTM9d4/
** Description changed: 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/ ** Also affects: neutron Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1943266 Title: Duplicated ARP responses from ovnmetadata namespaces Status in networking-ovn: New Status in neutron: New Bug description: 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/ To manage notifications about this bug go to: https://bugs.launchpad.net/networking-ovn/+bug/1943266/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
