I've read that two different ASs shouldn't originate the same network. I thought I read it in Halabi's book, but can't seem to find out where. Example, two different ASs have static routes to a third party, network 188.8.131.52. They both want to advertise the route to the BGP Core AS, so they both enter "network 184.108.40.206" in their BGP config.
The core sees two routes to the same network, one originating in AS1 and one in AS2. What's the reason that this is a problem, given that both AS1 and AS2 can equally reach network 220.127.116.11?
What's the reason for the rule that a given network should only originate from a single AS, if it's indeed a rule. Many thanks.
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