[ovs-discuss] ipoib with open vswitch

Ben Pfaff blp at nicira.com
Fri Apr 16 23:09:47 UTC 2010

On Thu, Apr 15, 2010 at 07:53:21PM +0200, Trygve Sanne Hardersen wrote:
> I've looked a bit at the Open vSwitch source code and it seems to me like
> MAC addresses longer than 6 bytes are not supported. Is this correct? If so,
> is there a workaround for the issue?

OVS doesn't currently support MAC addresses longer than 6 bytes.  You
are the first person to ask about them, so there is no workaround.

Does the Linux bridge support 20-byte MAC addresses?

> I'm tempted to try changing ETH_ADDR_LEN in packets.h to 20 which would
> allow storing the MAC of the IPOIB NIC, but I think more changes are needed
> than just changing the length.

I don't think that changing ETH_ADDR_LEN will help.

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