The IP Over NBMA (ION) Archive

[Yakov Rekhter <yakov@cisco.com>]

Grenville,

> >>2) Another view is that there exist a number of problems (e.g., unicast
> >>cut-through, IP multicast over small multicast groups per above draft)
> >>where NHRP provides useful solutions. Other people have concluded from this
> >>that NHRP is useful.
> 
> Yakov's draft (such as I remember of it) was not to do with small mc
> groups per se, but the interconnection of mrouters attached to the edges
> of a transit ATM/NBMA cloud. 

The draft covers not just routers, but hosts (senders, receivers) as well.
  
> However, it is
> also worth remembering that if you minimise your topological
> mismatch, you reduce the need for unicast cut-throughs (regardless
> of the name of the protocol you use to discover them).

Minimizing topological mismatch could reduce the need not just for
unicast cut-through, but for multicast cut-through as well.

Yakov.