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Telematics Chapter 6: Network Layer - Freie Universität Berlin

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ICMP & IPv6<br />

● ICMPv6 introduces some changes to ICMP<br />

● New ICMPv6 messages and procedures replace ARP<br />

● There are ICMPv6 messages to help with automatic address configuration<br />

● Path MTU discovery is automatic<br />

● New PacketTooBig message is sent to the source, since IPv6 routers do not<br />

fragment<br />

● There is no Source Quench in ICMPv6<br />

● IGMP for multicast is included in ICMPv6 (Multicast Listener Discovery, RFC4604)<br />

● ICMPv6 helps detect nonfunctioning routers and inactive partner hosts<br />

1 byte 1 byte 2 byte<br />

Type Code Checksum<br />

Message Body<br />

General format of ICMPv6 messages<br />

Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ <strong>Telematics</strong> ▪ <strong>Chapter</strong> 6: <strong>Network</strong> <strong>Layer</strong><br />

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