← Back to team overview

yahoo-eng-team team mailing list archive

[Bug 1943266] Re: Duplicated ARP responses from ovnmetadata namespaces

 

FYI, this bug was fixed in the upstream branch v21.06.0 this is the
patch:

https://github.com/ovn-
org/ovn/commit/578238b36073256c524a4c2b6ed7521f73aa0019

** Changed in: networking-ovn
       Status: New => Confirmed

** Changed in: networking-ovn
     Assignee: (unassigned) => Erlon R. Cruz (sombrafam)

** No longer affects: neutron

-- 
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:
  Confirmed

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