NHRP + LIS awareness

[Bryan Gleeson <[e-mail]>]

Hi all,

The nhrp-05 draft specifies the following station behaviour

"Station S first determines the next hop to station D
through normal routing processes. If the next hop is reachable 
through its NBMA interface, S constructs an NHRP request packet
containing station D's IP address as the target destination"

Is there any reason why a station could not choose to use
the next hop IP address as the target destination in the
NHRP request packet for some IP flows ? The spec is written 
as if stations will always attempt to short-cut - can this 
be a may instead of a must ?


Also let's assume that host station S is aware of its own 
LIS / subnet. It would thus seem possible to use NHRP for both
intra-LIS and inter-LIS transfer without the host necessarily
having a netmask of all 1s, and the consequent undesirable
proliferation of host routes in the network. Routers would
be able to do address aggregation, and NHRP could be used
as a perfectly good intra-LIS address resolution protocol.
Are there problems with any of this ?


Regards,
Bryan Gleeson
Adaptec.