git.net

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Openstack] [neutron]Why there is an extra router interface in the qrouter namespace in DVR mode?


Hi folks,

I have a DVR-enabled cluster made of a controller, network, and compute
node. The *agent_mode* is set as *dvr_snat* on the network node, and *dvr*
on the compute node. The north-south traffic works in both SNAT and the
floating IP scenarios, but I cannot explain the extra interface shown up in
the Horizon dashboard for every tenant router. More details as below:

*ip netns* output on the compute node:

[image: image.png]

*ip addr show* from within the router namespace on the compute node:

[image: image.png]

*Notice there is only *one* *qr* interface, the gateway, for the tenant
subnet.

Here is the display from the Horizon dashboard router interface page:
[image: image.png]

Do you see the extra interface (*da7884d9-2ff1*)? The only place I can find
it is from inside the additional routing table in the router namespace:

[image: image.png]

[image: image.png]

What does that extra interface come from and what is it for? Why does it
show up in the dashboard, but not in the command line output?

Thank you all in advance.

Cody
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20180805/eaa373b7/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 8067 bytes
Desc: not available
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20180805/eaa373b7/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 68296 bytes
Desc: not available
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20180805/eaa373b7/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 20791 bytes
Desc: not available
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20180805/eaa373b7/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 14421 bytes
Desc: not available
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20180805/eaa373b7/attachment-0003.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 9460 bytes
Desc: not available
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20180805/eaa373b7/attachment-0004.png>