Refer to the exhibit. An engineer working for a private service provider with an employee ID 5207:22:409 must configure iBGP multipath load sharing across the three paths. Which two commands must be…

Question

Exhibit

Options

• Amaximum-paths ibgp 3
• Bip load-sharing per-destination
• Cip load-sharing ibgp 3
• Drouter bgp 101
• Erouter bgp 100

• A
  75% (15)
• B
  5% (1)
• C
  5% (1)
• D
  15% (3)

Explanation

In the diagram, the PE and R2, R3, R4, R5 belong to AS 100. The PE router runs BGP process AS 100, so its BGP configuration must start with: To perform iBGP multipath load sharing across three equal-cost internal BGP paths, BGP must be instructed to keep and use multiple iBGP paths in the routing table. This is done with: maximum-paths ibgp 3 maximum-paths ibgp 3 tells BGP to install up to three iBGP paths to the same prefix, enabling CEF to load-share across those paths. router bgp 100 is required because the PE is in AS 100, not 101. ip load-sharing per-destination affects CEF behavior but does not enable BGP iBGP multipath by itself and is not specific to three iBGP paths. ip load-sharing ibgp 3 is not a valid IOS BGP command. router bgp 101 would configure the wrong AS and break the iBGP relationships shown in AS-100. Thus, the correct commands on the PE to achieve iBGP multipath load sharing over the three internal paths are maximum-paths ibgp 3 and router bgp 100, corresponding to A and E.

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