I'm a newcomer to ipv6,and there is a question about the interface "sit". what's it? and where is some document about it ? [root@dream_seeker /root]# ifconfig sit0 sit0 Link encap:IPv6-in-IPv4 NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 thanks! dream_seeker 2000/10/16 - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org