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
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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
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