What are the mandatory, well-known BGP attributes?

What are the mandatory, well-known BGP attributes?

What are the mandatory, well-known BGP attributes?

A.
origin, AS-path, next-hop

B.
AS-path, origin, MED

C.
AS-path, origin, weight

D.
AS-path, weight, MED

Explanation:
BGP Path Attributes
Mandatory Well-Known Attributes
Origin: Specifies the router’s origin
IGP
EGP
Unknown — Route was redistributed
AS-Path: Sequence of AS numbers through which the route is accessible
Next-Hop: IP address of the next-hop router
Discretionary Well-Known Attributes
Local Preference: Used for consistent routing policy with an AS
Atomic Aggregate: Informs the neighbor AS that the originating router aggregated routes
Nontransitive Attributes
Multiexit Discriminator: Used to discriminate between multiple entry points into an AS
Transitive Attributes
Aggregator: IP address and AS of the router that performed aggregation

Community: Used for route tagging

CCIE Routing and Switching v4.0 Quick Reference



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