300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

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QuestionQ165

Layer 3 Technologies

Refer to the exhibit.

Question Image

An engineer has configured BGP between routers R1 and R3. The BGP peers cannot form a neighbor adjacency to exchange routes.

Which configuration resolves the issue?

  • A R1 router bgp 6501 address-family ipv6 neighbor AB01:2011:7:100::3 activate
  • B R3 router bgp 6502 address-family ipv6 neighbor AB01:2011:7:100::1 activate
  • C R1 router bgp 6501 neighbor AB01:2011:7:100::3 ebgp-multihop 255
  • D R3 router bgp 6502 neighbor AB01:2011:7:100::1 ebgp-multihop 255
Explanation

IPv6 BGP neighbors must be activated under the IPv6 address family to exchange IPv6 routing information. R1 already has the peer in its IPv6 BGP summary, while the refused TCP connection from R3 indicates that R3 is not accepting the IPv6 BGP neighbor. Activating neighbor AB01:2011:7:100::1 under R3 BGP AS 6502 enables the required IPv6 BGP peering. The routers are directly connected, so ebgp-multihop is not required.

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