Chapter 5. ICMPv6

At the end of this chapter, you should be able to do the following:

  • Explain the purpose of ICMPv6 and the common structure of all ICMPv6 messages.

  • Describe the two types of ICMPv6 messages and how to distinguish them.

  • Define the four types of ICMPv6 error messages.

  • Explain the two types of ICMPv6 informational messages used for diagnostics.

  • Enumerate the common ICMPv4 messages and give their ICMPv6 equivalents.

  • Describe the path MTU (PMTU) discovery process for IPv6.

ICMPv6 Overview

Like IPv4, the specification for the Internet Protocol version 6 (IPv6) header and extension headers does not provide facilities for reporting errors. Instead, IPv6 uses an updated version of the Internet Control Message Protocol (ICMP) named ICMP version ...

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