Hi,
I am not sure about whether the following two conditions are true or not:
1) there is no such a direct link between two routers located in two
Internet eXchange Points-IXPs (even in same city) if they are from different
ASes. For example, a router A belongs to AS x located in IXP1, and router B
belongs to AS y located in IXP2, there is no link between A and B.
2) small AS will not use one router to connect to 2 different providers in
differnet IXPs. It is much cheaper using one router to connect with different
ASes in a same IXP.
Thanks.
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Chengchen
2007-11-29
