Click the Exhibit button. You want to use both links between R1 and R2. Because of the bandwidth difference between the two links, you must ensure that the links are used as much as possible. Which action will accomplish this goal?
A.
Ensure that the metric-out parameter on the Gigabit Ethernet interface is higher than the 10 Gigibit Ethernet interface.
B.
Define a policy to tag routes with the appropriate bandwidth community.
Answer: B. Define a policy to tag routes with the appropriate bandwidth community.
Explanation:
To maximize the use of both links (Gigabit Ethernet and 10 Gigabit Ethernet) proportionally to their bandwidths:
BGP bandwidth communities are critical. They encode the bandwidth of each next hop, enabling Junos to distribute traffic asymmetrically based on link capacity.
The text explicitly states that combining the bandwidth community with multipath and per-packet (per-flow) load balancing allows traffic to be split proportionally (e.g., 10:1 for a 10Gbps and 1Gbps link).
While enabling per-packet load balancing is required for this functionality, the question asks for the action to accomplish the goal. The bandwidth community must be configured via an import policy to reflect link speeds, which is the foundational step.
B
https://www.juniper.net/documentation/us/en/software/junos/sampling-forwarding-monitoring/bgp/topics/concept/bgp-multipath-unequal-understanding.html
The answer is B as per https://www.juniper.net/documentation/us/en/software/junos/sampling-forwarding-monitoring/bgp/topics/concept/bgp-multipath-unequal-understanding.html
C is not correct. you should use per-packet instead of per-prefix.
upvoted 2 times
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