While designing a wide area network, the network team wants to avoid undesired transit traffic through remote branch sites with multiple WAN connections. Which option can be used to manage traffic…

The correct answer is C. route filtering. Route filtering prevents a branch site from advertising routes it has learned from one WAN connection to another WAN connection, which would make it a transit path for traffic not destined for that branch. By filtering route advertisements, you ensure that only locally…

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Question

While designing a wide area network, the network team wants to avoid undesired transit traffic through remote branch sites with multiple WAN connections. Which option can be used to manage traffic flows in the remote network?

Options

Aroute weighting
Broute tagging
Croute filtering
Droute leaking

How the community answered

(36 responses)

A
14% (5)
B
6% (2)
C
72% (26)
D
8% (3)

Explanation

Route filtering prevents a branch site from advertising routes it has learned from one WAN connection to another WAN connection, which would make it a transit path for traffic not destined for that branch. By filtering route advertisements, you ensure that only locally originated (connected) routes are advertised, so other sites will not route traffic through the branch. Route tagging is used to mark routes for policy purposes but does not block transit by itself. Route weighting influences path selection but does not prevent route advertisement. Route leaking intentionally shares routes between VRFs and is the opposite of what is needed here.

Topics

#route filtering#transit traffic#WAN design#branch routing

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