Public bug reported:
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
** Affects: neutron
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1958627
Title:
Incomplete ARP entries on L3 gw namespace
Status in neutron:
New
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
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