Monday, 1 May 2017

BGP attributes - Well known vs Optional





Well Known :- All BGP implementations must understand and support it. It cannot be ignored.

  •  Mandatory:- Must be present in all update and all will support it
  •  Discretionary:- It can or cannot be present in update(optional) but all implementations must support it.

Optional:-  It is not mandatory to include and support it.
  • Transitive:- Can travel from one AS to another.
  •  Non-Transitive:- If received a router from peer then it will not be passed to its peer.

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