[ovs-dev] IPv6 rewrite support

[Ben Pfaff]

On Thu, Jun 23, 2011 at 03:08:10PM -0700, Jean Tourrilhes wrote:
> On Thu, Jun 23, 2011 at 01:25:46AM -0700, Justin Pettit wrote:
> > You are correct that we don't have support for rewriting.  Do you
> > have a use-case?  As you know, OpenFlow has support for IPv4 address
> > rewriting, but I haven't found great use-cases for that.  NAT comes
> > to mind, but that often carries a bunch of other baggage (e.g., ARP
> > resolution) that seems to make it less useful.  L3 address rewriting
> > also seems to have limited support in the hardware ASICs that I've
> > seen.
> > 
> > It probably wouldn't be hard to add, but I'd be genuinely interested
> > to know how people are using it.
> 
> 	OpenFlow defines IPv4 header rewrite, and you probably already
> support rewriting L2 addresses in IPv6 packets. It would seem logical
> to offer IPv6 header rewrite when we include IPv6 in the spec, so
> that's why I'm asking to see if there is practical problems.

I don't know of practical problems.  I don't know of a reason we'd
turn down a code contribution, either.