[Expired for neutron because there has been no activity for 60 days.]
** Changed in: neutron
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/2096931
Title:
Duplicate packets with router betwen flat network and vlan network
Status in neutron:
Expired
Bug description:
Release: 2024.1
Driver: OVN
I have one flat network and one vlan network. I have created a router
between them with the vlan network set as the external interface with
SNAT enabled. When I ping a openstack VM from a machine outside of
openstack I get duplicate responses:
64 bytes from 10.150.5.207: icmp_seq=107 ttl=63 time=0.243 ms
64 bytes from 10.150.5.207: icmp_seq=107 ttl=63 time=0.297 ms (DUP!)
64 bytes from 10.150.5.207: icmp_seq=107 ttl=63 time=0.297 ms (DUP!)
On the VM side I see:
16:32:48.854218 IP 10.150.5.199 > 10.150.5.207: ICMP echo request, id 25, seq
100, length 64
16:32:48.854219 IP 10.150.5.199 > 10.150.5.207: ICMP echo request, id 25, seq
100, length 64
16:32:48.854219 IP 10.150.5.199 > 10.150.5.207: ICMP echo request, id 25, seq
100, length 64
16:32:48.854288 IP 10.150.5.207 > 10.150.5.199: ICMP echo reply, id 25, seq
100, length 64
16:32:48.854298 IP 10.150.5.207 > 10.150.5.199: ICMP echo reply, id 25, seq
100, length 64
16:32:48.854303 IP 10.150.5.207 > 10.150.5.199: ICMP echo reply, id 25, seq
100, length 64
16:32:49.878264 IP 10.150.5.199 > 10.150.5.207: ICMP echo request, id 25, seq
101, length 64
16:32:49.878332 IP 10.150.5.207 > 10.150.5.199: ICMP echo reply, id 25, seq
101, length 64
16:32:49.878400 IP 10.150.5.199 > 10.150.5.207: ICMP echo request, id 25, seq
101, length 64
16:32:49.878400 IP 10.150.5.199 > 10.150.5.207: ICMP echo request, id 25, seq
101, length 64
16:32:49.878419 IP 10.150.5.207 > 10.150.5.199: ICMP echo reply, id 25, seq
101, length 64
16:32:49.878431 IP 10.150.5.207 > 10.150.5.199: ICMP echo reply, id 25, seq
101, length 64
In my setup I have three network nodes which seems to correspond to
the number of duplicated packets. If I block the traffic on one
controller with a firewall, the number of duplicated packets reduces.
Interestingly, if I ping the internal interface of the router from the
VM there is no duplicated packets, but if I ping from outside then I
get duplicates.
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