我在 Thinkpad W520 上安装了 15.04。但是，我无法让 IPv6 在 wlan1 接口上工作：
ifconfig wlan1
wlan1 Link encap:Ethernet HWaddr 8c:70:5a:d2:65:bc
inet addr:10.0.1.61 Bcast:10.0.1.255 Mask:255.255.255.0
inet6 addr: fe80::8e70:5aff:fed2:65bc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1534790 errors:0 dropped:0 overruns:0 frame:0
TX packets:1281764 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:618961336 (618.9 MB) TX bytes:249411071 (249.4 MB)
在 Wireshark 中，我能够看到 ICMPv6 RA 消息：
No. Time Source Destination Protocol Length Info
3 775.989536000 fe80::bac7:5dff:fec8:50e ff02::1 ICMPv6 150 Router Advertisement from b8:c7:5d:c8:05:0e
Frame 3: 150 bytes on …