[ovs-dev] [PATCH] Add OpenFlow support for 802.1AD Ethertype

Thomas F Herbert thomasfherbert at gmail.com
Thu Oct 23 12:32:55 UTC 2014


Thanks for your comments.

On 10/18/14, 12:32 PM, Ben Pfaff wrote:
> On Sat, Oct 18, 2014 at 09:55:57AM -0400, Thomas F Herbert wrote:
>> On 10/17/14, 4:54 PM, Ben Pfaff wrote:
>>> On Fri, Oct 17, 2014 at 01:19:33PM -0400, Dave Benson wrote:
>>>> On Fri, Oct 10, 2014 at 6:43 PM, Ben Pfaff<blp at nicira.com>  wrote:
>>>> ...
>> ...
>>> My first thought is to define a new NXM_NX_VLAN_TPID that matches the
>>> TPID, and for backward compatibility to imply a match on 0x8100 if it
>>> is not given.
>>
> I don't understand your proposal at all.  It must be possible to
> distinguish a match on an 0x88a8 tag from one on an 0x8100 tag.  How do
> you propose to do that?
802.1ad (double tagged 0x88a8) vlans and 802.1q(single tagged 0x8100) 
vlans can co-exist and the name spaces can overlap so I absolutely agree 
that it is a problem. Adding a match on the inner "customer" TCI, such 
as NXM_NX_VLAN_CTCI would do it but matching on the TPID does have 
clearer semantics.


-- 
Thomas F. Herbert




More information about the dev mailing list