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Networking Fundamentals · Intermediate

All-Nodes Multicast Address

The link-local multicast group ff02::1, which every IPv6 node joins and which functions like a link broadcast.

Definition

Messages sent to ff02::1 reach every IPv6 device on the local link. Routers send unsolicited Router Advertisements here. Pinging ff02::1 on an interface is a quick way to discover all IPv6 neighbors.

Example

ping ff02::1%eth0 returns replies from all IPv6 hosts on that link.

Exam tip

ff02::1 = all nodes; ff02::2 = all routers.

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