Netgear M5300-52G-POE+ (GSM7252PSv1h2) - ProSAFE 48+4 L2+ POE Stackable Managed Switch 관리자 가이드

Two methods exist for IPv6 sites to communicate with each other over the IPv4 network: 6in4 
tunnel and 6to4 tunnel. The 6in4 tunnel encapsulates IPv6 traffic over an explicitly configured 
IPv4 destination or end port of the tunnel with the IP protocol number set to 41. The 6to4 
tunnel IPv6 prefix is constructed by prepending 2002 (hexadecimal) to the global IPv4 
address. For example, if the IPv4 address is 4.4.4.1, the tunnel IPv6 prefix would be 
2002:404:401::/16.

The 6to4 tunnels are automatically formed IPv4 tunnels carrying IPv6 traffic. The automatic 
tunnel’s IPv4 destination address is derived from the 6to4 IPv6 address of the tunnel’s next 
hop. A 6to4 tunnel supports the functionality of a 6to4 border router that connects a 6to4 site 
to a 6to4 domain. With 6to4 tunnels, routers in a 6to4 domain, including other 6to4 border 
routers and 6to4 relay routers, can send and receive tunneled traffic from each other.

In the example, you create a 6in4 tunnel between Switch 1 and Switch 2. The tunnel carries 
IPv6 packets over IPv4 packets.

 Switch 1