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300-515 · Question #137

Which configuration must be performed when an engineer implements MP-BGP to exchange IPV6 routes?

The correct answer is A. BGP peering must be activated under the IPv6 address family. MP-BGP separates each address family into its own “activate” stanza. Simply establishing the IPv4 session isn’t enough - under router bgp … you must enter address-family ipv6 unicast (or vpnv6 unicast for IPv6 VPNs) and issue neighbor <IP> activate. This tells BGP to carry and…

IPv6 VPN Solutions

Question

Which configuration must be performed when an engineer implements MP-BGP to exchange IPV6 routes?

Options

  • ABGP peering must be activated under the IPv6 address family.
  • BThe bgp default ipv4-unicast command must be implemented on each router participating in MP-
  • CBGP must be deployed in a fully meshed architecture within the autonomous system.
  • DThe participating routers must be configured within the same autonomous system

How the community answered

(45 responses)
  • A
    89% (40)
  • B
    2% (1)
  • C
    2% (1)
  • D
    7% (3)

Explanation

MP-BGP separates each address family into its own “activate” stanza. Simply establishing the IPv4 session isn’t enough - under router bgp … you must enter address-family ipv6 unicast (or vpnv6 unicast for IPv6 VPNs) and issue neighbor <IP> activate. This tells BGP to carry and exchange IPv6 NLRI over that session.

Topics

#MP-BGP#IPv6 address family#BGP peering#6PE

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