IPv6 Global Unicast Addressing

Bundle lab · $29.99

Enable IPv6 forwarding and configure IPv6 global unicast addresses on directly connected links only. No routing protocols or static routes. Verify that each device can reach only its directly connected neighbors using IPv6.

Learning objectives

• Explain the structure and scope of IPv6 Global Unicast addresses (2000::/3).
• Enable IPv6 forwarding globally with ipv6 unicast-routing on Cisco IOS XE routers.
• Configure interface IPv6 global unicast addresses with correct /64 prefixes on directly connected links.
• Verify operational state and directly connected reachability using show ipv6 interface brief and ping.

Troubleshooting focus

• If interfaces show administratively down, ensure no shutdown is applied on every configured interface.
• If pings fail, confirm the IPv6 address/prefix on both ends of a link are in the same /64 and typed exactly (watch for :: compression mistakes).
• Ensure ipv6 unicast-routing is enabled on both routers; without it, some IPv6 behaviors and forwarding logic are inactive.
• Verify the host’s default route points to the correct on-link gateway address and that the gateway interface is up with the correct address.