yahoo-eng-team team mailing list archive

Thread
Date

[Bug 1904198] [NEW] DVR Distributed routers dropping packages to FIPs 90%+ of the time

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Diko Parvanov <1904198@xxxxxxxxxxxxxxxxxx>
Date: Fri, 13 Nov 2020 13:11:03 -0000
Reply-to: Bug 1904198 <1904198@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Public bug reported:

Environment:
cloud: bionic-ussuri
neutron-*: 2:16.1.0-0ubuntu2~cloud0
openvswitch-switch:2.13.0-0ubuntu1~cloud0

DVR enabled in environment.

External FIPs assigned to VM with a distributed HA router. Issue not
appearing with centralized router.

Ping/ssh to VM works for ~10% of the time, 90% of the time packets are
dropped.

When not working tcpdumping on the VM directly via virsh console can see
the ICMP packets arriving and leaving for the source.

Tcpdumping at the same time on the qrouter namespace can see the packets
coming from the VM and leaving for the source, but never reaching the
source, resulting in timeouts.

** Affects: neutron
     Importance: Undecided
         Status: New

** Description changed:

  Environment:
  cloud: bionic-ussuri
  neutron-*: 2:16.1.0-0ubuntu2~cloud0
  openvswitch-switch:2.13.0-0ubuntu1~cloud0
  
- External FIPs assigned to VM with a distributed HA router.
+ DVR enabled in environment.
+ 
+ External FIPs assigned to VM with a distributed HA router. Issue not
+ appearing with centralized router.
  
  Ping/ssh to VM works for ~10% of the time, 90% of the time packets are
  dropped.
  
  When not working tcpdumping on the VM directly via virsh console can see
  the ICMP packets arriving and leaving for the source.
  
  Tcpdumping at the same time on the qrouter namespace can see the packets
  coming from the VM and leaving for the source, but never reaching the
  source, resulting in timeouts.

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1904198

Title:
  DVR Distributed routers dropping packages to FIPs 90%+ of the time

Status in neutron:
  New

Bug description:
  Environment:
  cloud: bionic-ussuri
  neutron-*: 2:16.1.0-0ubuntu2~cloud0
  openvswitch-switch:2.13.0-0ubuntu1~cloud0

  DVR enabled in environment.

  External FIPs assigned to VM with a distributed HA router. Issue not
  appearing with centralized router.

  Ping/ssh to VM works for ~10% of the time, 90% of the time packets are
  dropped.

  When not working tcpdumping on the VM directly via virsh console can
  see the ICMP packets arriving and leaving for the source.

  Tcpdumping at the same time on the qrouter namespace can see the
  packets coming from the VM and leaving for the source, but never
  reaching the source, resulting in timeouts.

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1904198/+subscriptions