Which configuration change will force BR2 to reach 209 165 201 0/27 via BR1?

Refer to the Exhibit.

Which configuration change will force BR2 to reach 209 165 201 0/27 via BR1?
A . Set the weight attribute to 65.535 on BR1 toward PE1.
B . Set the local preference to 150 on PE1 toward BR1 outbound
C . Set the MED to 1 on PE2 toward BR2 outbound.
D . Set the origin to igp on BR2 toward PE2 inbound.

View Answer

Answer: C

Explanation:

In BGP (Border Gateway Protocol), the MED (Multi-Exit Discriminator) attribute is used to influence the inbound traffic from another AS (Autonomous System). A lower MED value is preferred over a higher one. By setting the MED to 1 on PE2 toward BR2 outbound, it makes this path less favorable for incoming traffic, thus influencing BR2 to prefer the path via BR1 to reach the network 209.165.201.0/27.

References: Implementing and Operating Cisco Service Provider Network Core Technologies source documents or study guide.

MED Attribute:

+ Optional nontransitive attribute (nontransitive means that we can only advertise MED to routers that are one AS away)

+ Sent through ASes to external BGP neighbors

+ Lower value is preferred (it can be considered the external metric of a route)

+ Default value is 0