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If router R4 receives a packet for AS1, it will have two
routes to AS2, one via R3 and one via R6. Because there are no
metrics involved, the routes are equal in R4's determination, so it
may choose either. Let's say it chooses to send the packet to R3. R3
also has two routes to AS1, one via R4 and one to R1. Again, these
routes are equal in R3's consideration, so the packet could be
returned to R4, where the cycle starts over again. Clearly, EGP has
problems for a general environment, so I would recommend leaving it
alone. |
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