optional ethernet A-D per EVI route

[Jakob Heitz <[e-mail]>]

Tony and I have an issue.
The draft says
8.4.1<http://tools.ietf.org/html/draft-ietf-l2vpn-evpn-07#section-8.4.1> Constructing the Ethernet A-D per EVPN Instance (EVI) Route





   This section describes the procedures used to construct the Ethernet

   A-D per EVPN Instance (EVI) route, which is used for aliasing (as

   discussed above). Support of this route is OPTIONAL.

And

9.2.2<http://tools.ietf.org/html/draft-ietf-l2vpn-evpn-07#section-9.2.2> Route Resolution


...

   If the Ethernet Segment Identifier field in a received MAC

   Advertisement route is set to a non-reserved ESI, then if the

   receiving PE decides to install forwarding state for the associated

   MAC address, it MUST be when both the MAC Advertisement route AND the

   associated set of Ethernet A-D per ES routes have been received.


Should this sentence be changed to "Support of this route is OPTIONAL unless non-reserved ESIs are used" or just be changed to MANDATORY?

Thanks,
Jakob.