Ben, I believe  the reference is to this:

https://github.com/Broadcom-Switch/of-dpa/tree/master/OF-DPA-2.0

During controller/app development, it is easier to work with a software
switch, that emulates a hardware switch pipeline.
To emulate OFDPA, group chaining support is necessary.

It was also needed for some earlier related work, which pushed multiple
MPLS labels in ECMP groups.
https://wiki.onosproject.org/display/ONOS/Installation+Guide#InstallationGuide-CPqDSoftwareSwitch

Group chaining would be really nice to have

Thanks
Saurav



On Tue, Jun 2, 2015 at 11:21 PM, Ben Pfaff <[email protected]> wrote:

> OVS doesn't support group chaining, but we didn't know that anyone
> cared, so it's interesting to hear from two (potential) users.
>
> On Tue, Jun 02, 2015 at 10:36:22PM -0700, Saurav Das wrote:
> > Group chaining is optional in OF1.3. As far as I know OVS does not
> support
> > it, which is why I use CPqD switch for chaining.
> >
> > Thanks
> > Saurav
> >
> > On Tue, Jun 2, 2015 at 9:52 PM, Vinllen Chen <[email protected]> wrote:
> >
> > > Hi, Dear all:
> > >
> > >     I send some group table to ovs, like l3 unicast, l2 interface, l3
> > > unicast table goto l2 interface table. But it
> > > return OFPGMFC_CHAINING_UNSUPPORTED when i send the group to ovs.
> > >
> > >     Doesn't ovs support group chaining which is defined in openflow1.3.
> > >
> > >     Greate appreciate for anyone's reply.
> > >
> > > Best Regards,
> > > Vinllen
> > >
> > > _______________________________________________
> > > discuss mailing list
> > > [email protected]
> > > http://openvswitch.org/mailman/listinfo/discuss
> > >
> > >
>
> > _______________________________________________
> > discuss mailing list
> > [email protected]
> > http://openvswitch.org/mailman/listinfo/discuss
>
>
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