However, a child can use one leaf A-D with the new
parent with a new label and later send withdraw leaf A-D to the old
parent
Lucy,
Note that "both" of Leaf A-D routes you mention above have the same NLRI
and the same next hop. Thus to BGP, these are really the same route.
What you are suggesting is:
- Send a route with a particular set of attributes to one neighbor;
- Send the same route with a different set of attributes to another
neighbor;
- Then withdraw the route from the first neighbor without withdrawing it
from the second.
This sort of functionality is not really supported by the BGP
distribution mechanisms. The MVPN mechanisms generally assume the
typical BGP distribution mechanisms, where BGP chooses the bestpath for
a particular NLRI, and then distributes it.
Eric
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