IPv6：目标不可达：地址不可达

Question

我的服务器无法 ping/访问外部的任何其他服务器。
ping6 适用于我的本地fe80::468...地址以及2a01:4f8...，但不适用于fe80::1！

错误/麻烦/问题：

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ip neigh 显示

fe80::1 dev eth0  FAILED

ping6 2001:4860:4860:8888（谷歌）

PING 2001:4860:4860:8888(2001:4860:4860:8888) 56 data bytes
From 2a01:4f8:202:43d5::2 icmp_seq=1 Destination unreachable: Address unreachable

ping6 -I eth0 fe80::1

PING fe80::1(fe80::1) from fe80::468a:5bff:fe2c:3d6a eth0: 56 data bytes
From fe80::468a:5bff:fe2c:3d6a icmp_seq=1 Destination unreachable: Address unreachable

ping6 -I 2a01:4f8:202:43d5::2 fe80::1

PING fe80::1(fe80::1) from 2a01:4f8:202:43d5::2 : 56 data bytes
From 2a01:4f8:202:43d5::2 icmp_seq=1 Destination unreachable: Address unreachable

设置

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ip -6 一个

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
    inet6 ::1/128 scope host
      valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
    inet6 2a01:4f8:202:43d5::2/64 scope global
      valid_lft forever preferred_lft forever
    inet6 fe80::468a:5bff:fe2c:3d6a/64 scope link
      valid_lft forever preferred_lft forever

ip -6 路由

2a01:4f8:202:43d5::/64 dev eth0  proto kernel  metric 256  pref medium
fe80::/64 dev eth0  proto kernel  metric 256  pref medium
default via fe80::1 dev eth0  metric 2  pref medium

任何想法如何解决这个问题？