RFC1883 and ipv6 spec v2

[Darrell Newcomb]

Upon reading both Flow Label sections from RFC 1883 and
draft-ietf-ipngwg-ipv6-spec-v2-01.txt I wonder about a few points.

1) From my understanding the Flow Labels, once assigned by the originating
node, will remain the same.  This represents a very interesting problem for
backbone routers, 20-bit's is not very much address space and a backbone router
could foreseeably encounter two Flow Labels equal randomly generated by two
different hosts.

Upon discussing this with a friend.  We decided that if the label is changed by
the router after each hop, that the 20-bits for the label would be enough. 
Providing (number of routers)^20th or even more if the Flow Label Table was
done on a per interface basis.

2) A rogue user could easily setup millions of flows to use up this space.

3) Is the Flow Label supposed to be used in conjuction with the Hop-by-Hop
routing options?

Thanks, Darrell Newcomb