On Fri, 14 Mar 1997, Alan Barrett wrote:
The topology we are discussing:
M / \ A B * Peer link | * | Customer link RRRRRRR Point1 * * Point2 VVVVVVV
M might very well have requested R to consider the paths "R A M" and "R B M" to be equally good, and M doesn't care that A is a customer of R but B is not a customer of R. It's perfectly reasonable for R to accede to M's wishes in this regard.
M and A have no direct relationship in this picture so I don't see why M would be making requests to R. R should normally be preferring customer links to peer links. I think it's reasonable of V to demand that if R wishes to treat M in such an unusual way, R consider all of M's routes customer routes. Otherwise R cannot present a consistent picture to V because R's policy is not consistent (preferring a customer route on one side and a peer route on the other). DS