Seems more related to neutron-dynamic-routing project ** Tags added: l3-bgp
** Changed in: neutron Importance: Undecided => Medium ** Changed in: neutron Status: New => Opinion -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1958627 Title: Incomplete ARP entries on L3 gw namespace Status in neutron: Opinion Bug description: Setup information: Legacy l3 router + bgp + Public Address I see a lot unnecessary ARP request traffic to all instances in same network. Check bgp speaker advertised routes:(fake addresses) openstack bgp speaker list advertised routes 3e533042-729a-4782-8b8d-xxxxx +------------------+---------------+ | Destination | Nexthop | +------------------+---------------+ | 99.99.99.0/24 | 99.99.99.1 | +------------------+---------------+ Check L3 gw namespace arp table:(large count of incomplete ARP entries) ip netns exec qrouter-b524c5fc-dc91-41cb-xxxx-ceded936xxx arp -ne Address HWtype HWaddress Flags Mask Iface 99.99.99.92 ether (incomplete). C qg-6a574a15-db 99.99.99.96 ether fa:16:3e:c6:85:28 C qr-7a4cfad1-f7 99.99.99.97 ether fa:16:3e:b4:3d:28 C qr-7a4cfad1-f7 99.99.99.90 ether fa:16:3e:83:1f:4b C qr-7a4cfad1-f7 99.99.99.91 (incomplete) qr-7a4cfad1-f7 99.99.99.98 ether (incomplete) C qr-7a4cfad1-f7 99.99.99.99 ether fa:16:3e:c6:e6:fd C qr-7a4cfad1-f7 99.99.99.94 ether fa:16:3e:dc:34:74 C qr-7a4cfad1-f7 99.99.99.95 (incomplete) qr-7a4cfad1-f7 99.99.99.92 ether fa:16:3e:51:af:ef C qr-7a4cfad1-f7 99.99.99.93 (incomplete) qr-7a4cfad1-f7 99.99.99.98 (incomplete) qr-7a4cfad1-f7 99.99.99.96 (incomplete) qr-7a4cfad1-f7 ................. Neutron adds all subnet IPs and try arping all time. Wallaby release To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1958627/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp