Discovering the Routes Followed by Router Packets when Traveling to the IPv6 Destination

You can discover the routes that router packets follow when traveling to their destination using the traceroute command. You can specify the following parameters in the traceroute command:

• Destination IPv6 address
• Source interface for each of the transmitted packets
• Source IPv6 address for each of the transmitted packets
• Maximum number of hops of the trace and a timeout value
• Size of the IPv6 packets (not the ICMP payload) in the range 0–64000 bytes sent with the traceroute command. Including a size might help locate any MTU problems that exist between your router and a particular device.
• Hop count in the range 1–255; the default is 32

You can also force transmission of the packets on a specified interface regardless of what the IPv6 address lookup indicates. To discover the routes that router packets follow when traveling to their destination:

• Issue the traceroute command in Privileged Exec mode.
  host1#traceroute ipv6 1::1 timeout 10