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What Is the Full Name of MED?

Latest reply: May 5, 2017 06:07:48 1081 1 0 0 0
What Is the Full Name of MED?
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Created May 5, 2017 06:07:48

What Is the Full Name of MED?

The full name of MED is MULTI_EXIT_DISC. An MED is an optional non-transitive attribute. The format of an MED is an integer of four bytes. The MED attribute is exchanged only between two neighboring ASs. The AS that receives the MED does not advertise it to any other AS. The MED serves as the metric used by an IGP. It is used to determine the optinal route when traffic enters an AS. When a BGP router obtains multiple routes with the same destination address but different next hops from EBGP peers, the route with the smallest MED value is selected as the optinal route when other conditions of the routes are the same.

For details about the MED, see RFC 4271.
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