HPE7-A06 · Question #14

Refer to the exhibit. Review the diagram and existing configuration of RouterA above. Which configuration changes are necessary to permit load balancing between RouterA and RouterB? (Choose two.) A. B

The correct answer is A. router bgp 64500 neighbor 10.255.0.12 ebgp-multihop 2 B. router bgp 64500 neighbor 10.255.0.12 update-source loopback 0. The eBGP session is formed to RouterB's loopback (10.255.0.12) over two physical links. For eBGP peering to a loopback, RouterA must (1) enable multihop so TTL > 1, and (2) source BGP updates from its own loopback. Thus, add neighbor 10.255.0.12 ebgp-multihop 2 and neighbor 10.25

Implementing Complex Campus Access Switching

Question

Refer to the exhibit. Review the diagram and existing configuration of RouterA above. Which configuration changes are necessary to permit load balancing between RouterA and RouterB? (Choose two.) A. B. C. D. E.

Exhibits

Options

Arouter bgp 64500 neighbor 10.255.0.12 ebgp-multihop 2
Brouter bgp 64500 neighbor 10.255.0.12 update-source loopback 0
Crouter bgp 64500 address-family ipv4 unicast neighbor 10.255.0.12 update-source loopback 0
Drouter bgp 64500 maximum-paths 2
Erouter bgp 64500 neighbor 10.255.0.12 multipath-relax

How the community answered

(66 responses)

A
56% (37)
C
6% (4)
D
23% (15)
E
15% (10)

Explanation

The eBGP session is formed to RouterB's loopback (10.255.0.12) over two physical links. For eBGP peering to a loopback, RouterA must (1) enable multihop so TTL > 1, and (2) source BGP updates from its own loopback. Thus, add neighbor 10.255.0.12 ebgp-multihop 2 and neighbor 10.255.0.12 update-source loopback 0. Once the session is up, the two equal-cost routes to 10.255.0.12 allow load balancing across both links.

Topics

#BGP#load balancing#ECMP#routing policy

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