[ovs-dev] [IPv6 IV: A New Hope 6/6] nicira-ext: Support matching IPv6 Neighbor Discovery messages.

Ben Pfaff blp at nicira.com
Wed Feb 2 17:26:40 UTC 2011

On Tue, Feb 01, 2011 at 11:17:02PM -0800, Justin Pettit wrote:
> On Feb 1, 2011, at 12:45 PM, Ben Pfaff wrote:
> > Same comment for format_odp_key_attr() as in the previous patch: I don't
> > think any of the fields are optional so I don't see why we would omit
> > them from the output.
> Actually, the source and target link layer (sll and tll) fields are
> part of the options section of neighbor solicitation messages and are
> truly optional (unlike ARP).  I've continued to omit them if they're
> all zeroes, but I can print them if you'd still prefer that.

Ah, I misunderstood.  So if we print a value, then that flow requires
that value to be present, and if we print no value, then that flow
requires that value to be absent?  If so, then the current code makes
perfect sense.  Thank you for the explanation.

More information about the dev mailing list