[ovs-dev] ib0 as a port on a bridge?

[Stephen Hemminger]

On Wed, 19 Sep 2012 13:57:39 -0400
christopher barry <cbarry at rjmetrics.com> wrote:

> On Tue, 2012-09-18 at 23:49 -0400, christopher barry wrote:
> > if this is not the best list for user questions, please send me to
> > wherever the best place is for that.
> > 
> > I'm building an opennebula cloud, and I have openvswitch master running
> > on squeeze kvm host nodes with 3.5.4 as bridge br0 with a single port
> > (eth0 at the moment). Each host node also has a Mellanox QDR HCA for
> > storage connectivity. I've configured an ipoib interface (ib0) as well
> > on each node. eth0 and ib0 are on separate subnets.
> > 
> > Thinking it would be faster to use ib0 as the bridge port, rather than
> > eth0, I reconfigured all the bridges in /etc/network/interfaces to use
> > ib0, removing eth0 as a port in the file, and bounced the cluster.
> > 
> > couple of things happened:
> > * ib0 did get added as a port, but eth0 remained unexpectedly (I had to
> > del-port it) (that may be by design though, dunno)
> > * I could not pass traffic through br0 when ib0 was a port.
> > * I could ping the bridge with ib0 from it's owning host, but not from
> > outside. (assuming it's just br0 answering, and ib0 is non-functional)
> > 
> > I'm confused about what is happening. By itself, the ib0 is functioning
> > fine, and the bridge works fine with eth0. Is it because ib0 is not a
> > real ethernet nic, per se, that I can't make this work? Was it dumb to
> > even try it? Or, am I just missing something obvious?
> > 
> > Thanks for any insight,
> > -C
> > 
> 
> No takers?

Isn't Infiniband and Ethernet addressing different?