Technical data

Figure 9–1: Routing IPv6 Traffic from Host A to Host F

Host A Host B Host C

Host D Host E Host F

Host G Host H Host I

Department A

Department B

Department C

v4/v6 v4/v6 v4/v6

v4 v4 v4/v6

Router A

v4/v6

Router B

v4/v6

Router C

VM-0950A-AI

In Figure 9–2, to communicate with host I, host A sends an IPv6 packet to router

A. Router A forwards the IPv6 packet to router B. Router B encapsulates the IPv6

packet and sends the IPv4 packet over a router-to-host tunnel to Host I, which

decapsulates the IPv4 packet. The IPv4 infrastructure routes the packet to host I.

For hosts, the host-to-router tunnel is more efficient because host A, host B, and

host C administrators do not need to create individual host-to-host tunnels for

each destination host.

IPv6 9–5