Summary

In this chapter, you learned about the new Internet Control Message Protocol for IPv6 (ICMPv6) messages; the use of path Maximum Transmission Unit discovery (PMTUD) with IPv6; and the mechanisms within Neighbor Discovery Protocol (NDP), such as the replacement of Address Resolution Protocol (ARP) in IPv4, stateless autoconfiguration, prefix advertisement, duplicate address detection (DAD), and prefix renumbering. You now understand the impact of IPv6 on popular protocols such as Domain Name System (DNS), Dynamic Host Configuration Protocol (DHCP), IPSec Authentication Header (AH), IPSec Encapsulating Security Payload (ESP), and Mobile IP.

Then you read about managing neighbor entries in the router's neighbor discovery table, tuning NDP messages, enabling and tuning prefix advertisements on the router's network interface, disabling router advertisements on the interface when necessary, and renumbering an advertised IPv6 prefix. You also learned about creating a host table for IPv6 access, defining standard and extended IPv6 ACLs, and enabling them on a router's interfaces. Finally, you saw diagnostic and management tools with IPv6 support such as ping, Telnet, traceroute, SSH, and TFTP on the Cisco router.