yahoo-eng-team team mailing list archive

[Alexey Kashavkin <2009632@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

ARP requests from the ovnmeta namespace are sent to the physical
interfaces of the compute nodes, and then get into the arp tables of the
network switches. Such requests come to the switches from each compute
node and cause problems on the switches.

I have attached a file with packet captures from each interface, a list
of flows from the required datapath, the output of ovs-vsctl and the
output of the 'ip address' command from the ovnmeta namespace.

The cluster has 3 controllers on KVM virtual machines and 8 compute
nodes on bare metal.

Version:
OpenStack Train
Rocky Linux 8.5, 4.18.0-348.23.1.el8_5.x86_64
TripleO using the current-tripleo-rdo tag for containers and RPMs
Open vSwitch 2.15.0-94 on host (from RPM repository NFV)
OVN 2.12.0-10 in container

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: ovn

** Attachment added: "collected.txt"
   https://bugs.launchpad.net/bugs/2009632/+attachment/5652520/+files/collected.txt

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/2009632

Title:
  ARP requests from ovnmeta namespaces are sent to physical interfaces
  of computing nodes

Status in neutron:
  New

Bug description:
  ARP requests from the ovnmeta namespace are sent to the physical
  interfaces of the compute nodes, and then get into the arp tables of
  the network switches. Such requests come to the switches from each
  compute node and cause problems on the switches.

  I have attached a file with packet captures from each interface, a
  list of flows from the required datapath, the output of ovs-vsctl and
  the output of the 'ip address' command from the ovnmeta namespace.

  The cluster has 3 controllers on KVM virtual machines and 8 compute
  nodes on bare metal.

  Version:
  OpenStack Train
  Rocky Linux 8.5, 4.18.0-348.23.1.el8_5.x86_64
  TripleO using the current-tripleo-rdo tag for containers and RPMs
  Open vSwitch 2.15.0-94 on host (from RPM repository NFV)
  OVN 2.12.0-10 in container

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/2009632/+subscriptions