IPv6 Tunneling

IPv6/IPv4

router

IPv4 Network

IPv4 Network

IPv4 Network

IPv4

router

IPv4

router

IPv4

router

IPv6/IPv4

router

IPv6/IPv4

router

IPv6/IPv4

router

?

router

to

router

IPv4

router

?

host to

router

tunnel

?

host to

host

?

router

to

host

Host IPv6/IPv4

IPv6/IPv4 host

Four possible ways to tunnel

(last segment of end-to-end span)

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