How does the BGP Additional Paths feature modify the traditional behavior of BGP?

The correct answer is B. It allows a router to send the best path and other paths without implicit withdrawal. With Additional Paths, BGP speakers can advertise not only their single best route for a prefix but also alternate routes. Those additional paths are carried alongside the best path, and none are implicitly withdrawn when the best path changes, unlike classic BGP, which…

Core Routing

Question

Options

AIt allows eBGP neighbors to use BGP synchronization to share multiple paths.
BIt allows a router to send the best path and other paths without implicit withdrawal.
CIt allows regular BGP neighbors to send eBGP and iBGP routes to iBGP peers.
DIt allows iBGP and eBGP neighbors to use the MED metric when sharing paths.

How the community answered

(39 responses)

A
8% (3)
B
87% (34)
C
3% (1)
D
3% (1)

Explanation

With Additional Paths, BGP speakers can advertise not only their single best route for a prefix but also alternate routes. Those additional paths are carried alongside the best path, and none are implicitly withdrawn when the best path changes, unlike classic BGP, which advertises only one path per prefix.

Topics

#BGP Additional Paths#implicit withdrawal#multipath advertisement#iBGP

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