Let me try and see if I understand this.

Basically what you're asking for is for the Group ID to remain a proxy for
the VLAN ID, but not necessarily for the VNID.  In the case of an L2VPN,
VNID=VLAN. But in the case of L3VPN a VNID may actually represent a group
of VLANs.

If so, I agree with your assessment.

Anoop

On Sat, Mar 21, 2015 at 5:38 PM, Benson Schliesser <[email protected]>
wrote:

> Speaking as an individual contributor to NVO3:
>
> In reviewing draft-ietf-nvo3-hpvr2nve-cp-req-02, it seems to me that
> there is an assumption that a tNVE will perform local switching of e.g.
> inter-VM packets. Based on this assumption, the recommendation seems to be
> that the VDP GroupID is mapped to the VNID for a given VN.
>
> I don't see anything wrong with that particular mode of operation. But I
> do also think it would be valuable to decouple things a bit further...
> Specifically, I can imagine two modes of operation. One of them is as
> described in the draft, where GroupID == VNID. The other might be described
> as GroupID == VAP.
>
> This latter mode might be useful in cases where the nNVE is responsible
> for filtering of some kind, in cases where there are network services that
> must be processed for inter-TS traffic, etc. In fact it seems to me that we
> may want this latter mode to be the default behavior of a split NVE.
>
> It's not clear to me how these different modes might be communicated via
> VDP, and/or via the NVE-NVA control plane, if they need to be
> communicated... I'd be interested to hear feedback from the authors and any
> other WG contributors that have thought about this topic.
>
> Thanks,
> -Benson
>
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