macos - IPv6 Mac OS X 10.6 ping 失败

Question

$ ifconfig
...
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:16:cb:94:1a:79 
inet6 fe80::216:cbff:fe94:1a79%en0 prefixlen 64 scopeid 0x4 
inet 192.168.163.200 netmask 0xfffffe00 broadcast 192.168.163.255
media: autoselect (100baseTX <full-duplex,flow-control>)
status: active
...

所以，正如你所看到的，我的机器有 fe80::216:cbff:fe94:1a79地址 en0界面。另外，

$ ping6 fe80::216:cbff:fe94:1a79%en0
PING6(56=40+8+8 bytes) fe80::216:cbff:fe94:1a79%en0 --> fe80::216:cbff:fe94:1a79%en0
16 bytes from fe80::216:cbff:fe94:1a79%en0, icmp_seq=0 hlim=64 time=0.153 ms
^C
--- fe80::216:cbff:fe94:1a79%en0 ping6 statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.153/0.153/0.153/0.000 ms

$

但是为什么

$ ping6 fe80::216:cbff:fe94:1a79
ping6: UDP connect: No route to host
$ 

失败了？是否可以在不输入接口(interface)名称的情况下访问远程机器%en0 ？

可能这是一个非常基本的问题，因为我不是一个强大的 IPv6 用户。

Answer 1

fe80:: 地址是链接本地的，这意味着该地址仅对于该特定适配器是唯一的。每个适配器都可以通过 ping 您提供的地址 fe80::216:cbff:fe94:1a79 来引用完全不同的机器。

http://en.wikipedia.org/wiki/Link-local_address