BGP Attributes in detail

Question

Accepted Answer

BGP attributes are used to determine the best path for routing traffic between autonomous systems.

BGP attributes include: AS Path, Next Hop, Local Preference, Weight, Multi-Exit Discriminator (MED), Origin, and Community
AS Path is a list of autonomous systems that the route has passed through
Next Hop is the IP address of the next router in the path
Local Preference is used to indicate the preferred path for outbound traffic
Weight is a Cisco-specific attribute used to indicate the preferred path for inbound traffic
MED is used to indicate the preferred path for inbound traffic when there are multiple entry points into an AS
Origin indicates whether the route was learned from within the AS (IGP) or from an external AS (EGP)
Community is a way to tag routes with additional information for routing policies

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