In order to establish only IPv6 BGP peering, which command should be used?
a. no bgp default ipv4-unicast
b. neighbor IPv6_address remote as AS_Number
c. address-family ipv6
d. None of the above
a. no bgp default ipv4-unicast
Explanation: BGP uses only the IPv4 unicast as its default protocol. All BGP neighbors are assumed to be IPv4 unicast neighbors. In order to establish IPv6 BGP peering with its neighbors, it is recommended to disable the default BGP IPv4 unicast function. Otherwise, all BGP neighbors will be defined as IPv4 unicast neighbors instead of IPv6 . The command to do so is no bgp default ipv4 unicast.
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