I an having a problem using vxlan with Linuxbridge

asked 2014-06-17 09:20:04 -0600

Phil_h gravatar image

I am using Icehouse on Ubuntu 14.04. I have set up a controller node, a network node using OVS, a compute node using OVS and a compute node using linuxbridge. I am using VXLAN to encapsulate packets on the data plane. I may be doing something wrong but I believe I have run into a neutron bug and I would like to be sure before I submit a bug report.

I can get this all working but I have to do a couple of items outside Openstack that Openstack is not doing correctly.

Specificially on the compute node running the linuxbridge, first to get things talking the VXLAN kernel modlue must be loaded with the udp_port=4789, since Linux will use the port 8472 by default and OVS uses the prorper VXLAN udp port of 4789.

Using the cli I can build networks and VMs on both compute nodes but the VMs on the compute node using linuxbridge never get IPs. Specifically I see the DHCP reply packets coming into the ethernet interface on this node but they never get forwarded to the vxlan interface.

Neutron builds the vxlan interface with the following commands: ip link add vxlan-10 type vxlan id 10 dev eth1 proxy ip link set vxlan-10 up brctl addif brq499c385c-cf vxlan-10 ip nei add lladdr fa:16:3e:97:81:cf dev vxlan-10 bridge fdb append 00:00:00:00:00:00 dev vxlan-10 dst bridge fdb add fa:16:3e:3e:08:c4 dev vxlan-10 dst bridge fdb append 00:00:00:00:00:00 dev vxlan-10 dst bridge fdb add fa:16:3e:97:81:cf dev vxlan-10 dst

which doesn't work. If I delete the vxlan interface and build it but change the second line to: ip link add vxlan-10 type vxlan id 10 remote dev eth1

Everything works. All of my VMs get IPs and I can connect from VMs built on the OVS compute node to the ones built on the linuxbridge node.

Has anyone using Icehouse gotten this type of setup working?


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answered 2014-06-17 11:40:09 -0600

SGPJ gravatar image

A week back I got this issue and with latest release it seems ok. Please get the latest.

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answered 2014-06-17 11:28:39 -0600

Phil_h gravatar image

Doing a upgrade fixed th e problem. Apparantely it waws a bug in a package.

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Asked: 2014-06-17 09:20:04 -0600

Seen: 1,649 times

Last updated: Jun 17 '14