Re: Simple Multicast - building a case for a BOF or WG

[amc@cs.berkeley.edu (Adam M. Costello)]

Radia Perlman <Radia.Perlman@East.Sun.COM> wrote:

> You can do multisender with unidirectional trees, by building multiple
> trees (one per source) or unicasting to the Root, which creates a
> hotspot at the root...

What exactly is meant by "hotspot"?  The number of packets arriving
at the root is the same as the number arriving at every other node in
the tree.  Is there much more work to be done per packet at the root?
If so, is it fundamentally more work, or just more work in current
implementations?

AMC