Router R1 currently supports IPv4, routing packets in and out all its interfaces. R1’s configuration needs to be migrated to support dual-stack operation, routing both IPv4 and IPv6. Which of the following tasks must be performed before the router can also support routing IPv6 packets? (Choose two answers.)
- Enable IPv6 on each interface using an ipv6 address interface subcommand.
- Enable support for both versions with the ip versions 4 6 global command.
- Additionally enable IPv6 routing using the ipv6 unicast-routing global command.
- Migrate to dual-stack routing using the ip routing dual-stack global command.
Explanation: Of the four answers, the two correct answers show the minimal required configuration to support IPv6 on a Cisco router: enabling IPv6 routing (ipv6 unicast-routing) and enabling IPv6 on each interface, typically by adding a unicast address to each interface (ipv6 address…). The two incorrect answers list nonexistent commands.
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