Refer to the exhibit.

In the diagram, thePE and R2, R3, R4, R5belong toAS 100. The PE router runs BGP processAS 100, so its BGP configuration must start with:

router bgp 100

To performiBGP multipath load sharingacross 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:

router bgp 100

maximum-paths ibgp 3

maximum-paths ibgp 3 tells BGP to install up tothreeiBGP paths to the same prefix, enabling CEF to load-share across those paths.

router bgp 100 is required because the PE is inAS 100, not 101.

Other options:

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 aremaximum-paths ibgp 3androuter bgp 100, corresponding toA and E.