yahoo-eng-team team mailing list archive

[Kevin Benton <1668209@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Currently the linux bridge trunk plugin is setting the mac address on
the tap devices for the subports to the same macs as the port model.
When the VM sends traffic, this results in the warnings below which
seems to result in the forwarding behavior being unstable. We shouldn't
set the mac on this TAP device since it doesn't really serve a purpose.

Feb 26 16:40:09 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPDISCOVER(ns-1b771c00-9e) fa:16:3e:30:23:78
Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPOFFER(ns-1b771c00-9e) 10.1.16.4 fa:16:3e:30:23:78
Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:11 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:11 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:11 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:12 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPDISCOVER(ns-1b771c00-9e) fa:16:3e:30:23:78
Feb 26 16:40:12 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:12 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPOFFER(ns-1b771c00-9e) 10.1.16.4 fa:16:3e:30:23:78
Feb 26 16:40:15 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:17 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPDISCOVER(ns-1b771c00-9e) fa:16:3e:30:23:78
Feb 26 16:40:17 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
Feb 26 16:40:17 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPOFFER(ns-1b771c00-9e) 10.1.16.4 fa:16:3e:30:23:78
Feb 26 16:40:19 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address

** Affects: neutron
     Importance: High
     Assignee: Kevin Benton (kevinbenton)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Kevin Benton (kevinbenton)

** Changed in: neutron
   Importance: Undecided => High

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1668209

Title:
  linux bridge trunk wiring shouldn't set tap mac address

Status in neutron:
  New

Bug description:
  Currently the linux bridge trunk plugin is setting the mac address on
  the tap devices for the subports to the same macs as the port model.
  When the VM sends traffic, this results in the warnings below which
  seems to result in the forwarding behavior being unstable. We
  shouldn't set the mac on this TAP device since it doesn't really serve
  a purpose.

  Feb 26 16:40:09 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPDISCOVER(ns-1b771c00-9e) fa:16:3e:30:23:78
  Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPOFFER(ns-1b771c00-9e) 10.1.16.4 fa:16:3e:30:23:78
  Feb 26 16:40:10 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:11 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:11 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:11 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:12 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPDISCOVER(ns-1b771c00-9e) fa:16:3e:30:23:78
  Feb 26 16:40:12 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:12 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPOFFER(ns-1b771c00-9e) 10.1.16.4 fa:16:3e:30:23:78
  Feb 26 16:40:15 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:17 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPDISCOVER(ns-1b771c00-9e) fa:16:3e:30:23:78
  Feb 26 16:40:17 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address
  Feb 26 16:40:17 ubuntu-xenial-osic-cloud1-s3500-7485658 dnsmasq-dhcp[10567]: DHCPOFFER(ns-1b771c00-9e) 10.1.16.4 fa:16:3e:30:23:78
  Feb 26 16:40:19 ubuntu-xenial-osic-cloud1-s3500-7485658 kernel: brq9e974900-cd: received packet on tapa8a6ce4a-e8 with own address as source address

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1668209/+subscriptions