Sunday, September 5, 2021

BGP question

So usually when a router receives a prefix with its own AS in the AS-path, it will reject that route as part of a loop prevention mechanism.

So when a route reflector reflects routes to clients, are those prefixes accepted by the clients because its own AS is the most recent AS? When the route reflector reflects, I guess it doesn't prepend its own AS on (again) or make any changes from the received prefix?



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