6to4-Derived Addressing on a Host
When an IPv6 host receives the 6to4–derived prefix by way of a router advertisement, the host automatically reconfigures a 6to4–derived address on an interface. The address has the following form.
prefix:IPv4 address:subnet ID:host ID/64 |
The results of ifconfig –a on a host with a 6to4 interface might resemble the following:
qfe1:3: flags=2180841<UP,RUNNING,MULTICAST,ADDRCONF,ROUTER,IPv6>
mtu 1500 index 7
inet6 2002:8192:56bb:9258:a00:20ff:fea9:4521/64
|
The 6to4–derived address follows inet6 in the output from ifconfig.
|
Address Part |
Corresponding Value |
|---|---|
|
Prefix |
2002, which is the 6to4 prefix |
|
IPv4 value |
8192:56bb, which is the IPv4 address, in hexadecimal notation, for the 6to4 pseudo-interface that is configured on the 6to4 router |
|
subnet ID |
9258, which is the address of the subnet of which this host is a member |
|
MAC address |
a00:20ff:fea9:4521, which is the link layer address of the host interface that is now configured for 6to4 |
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