目前树莓派和 Windows 电脑都是有线直连光猫，但是树莓派却无法使用 IPv6 访问互联网，很奇怪。 开始以为光猫有问题，但尝试过用 WIFI 连接路由器，同样是手机正常用 IPv6 ，但是树莓派不行。 在此请教各位大佬，看看有没有解决办法。

Windows

Windows 电脑能正常获取到 IPv6 ，也能正常访问：

以太网适配器 以太网:

   连接特定的 DNS 后缀 . . . . . . . :
   IPv6 地址 . . . . . . . . . . . . : 240e:1b1:18b1:4020:3fdf:b377:98ca:a6c0
   临时 IPv6 地址. . . . . . . . . . : 240e:1b1:18b1:4020:2c01:2dbb:7438:2b7
   本地链接 IPv6 地址. . . . . . . . : fe80::104f:45c6:f783:f13d%9
   IPv4 地址 . . . . . . . . . . . . : 192.168.1.5
   子网掩码  . . . . . . . . . . . . : 255.255.255.0
   默认网关. . . . . . . . . . . . . : fe80::1%9
                                       192.168.1.1

请求外网

# curl --ipv6 --max-time 30 -v ip.sb
* Host ip.sb:80 was resolved.
* IPv6: 2606:4700:20::ac43:4bac, 2606:4700:20::681a:d1f, 2606:4700:20::681a:c1f
* IPv4: (none)
*   Trying [2606:4700:20::ac43:4bac]:80...
* Connected to ip.sb (2606:4700:20::ac43:4bac) port 80
> GET / HTTP/1.1
> Host: ip.sb
> User-Agent: curl/8.9.1
> Accept: */*
>
* Request completely sent off
< HTTP/1.1 200 OK
< Date: Wed, 06 Nov 2024 03:40:46 GMT
< Content-Type: text/plain
< Transfer-Encoding: chunked
< Connection: keep-alive
< Vary: Accept-Encoding
< Cache-Control: no-cache
< cf-cache-status: DYNAMIC
< Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=%2BsybXgwsYFeIchZ3GiiiubR5WrfhpNwP8BeFKiJcKvcvnPpA2Z9O2zSmKXO8hv0qdqcCdz8cIiTyk7oqatr7igul%2FYDOHlBArq6yozFKBNSgKBUHOAMMg9DtL1gPjSitVu8T"}],"group":"cf-nel","max_age":604800}
< NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
< Server: cloudflare
< CF-RAY: 8de21062ff115986-IAD
< alt-svc: h3=":443"; ma=86400
< server-timing: cfL4;desc="?proto=TCP&rtt=240531&sent=1&recv=3&lost=0&retrans=0&sent_bytes=0&recv_bytes=68&delivery_rate=0&cwnd=250&unsent_bytes=0&cid=0000000000000000&ts=0&x=0"
<
240e:1b1:18b1:4020:2c01:2dbb:7438:2b7

树莓派

有获取到公网 IPv6 ，局域网内能通，就是访问不了外网。

$ nmcli device show
GENERAL.DEVICE:                         eth0
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         DC:A6:32:87:E2:A7
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     Wired connection 1
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/2
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.2/24
IP4.GATEWAY:                            192.168.1.1
IP4.ROUTE[1]:                           dst = 192.168.1.0/24, nh = 0.0.0.0, mt = 100
IP4.ROUTE[2]:                           dst = 0.0.0.0/0, nh = 192.168.1.1, mt = 100
IP4.DNS[1]:                             192.168.1.1
IP4.WINS[1]:                            192.168.1.1
IP6.ADDRESS[1]:                         240e:1b1:18b1:4020:a8f9:a6e4:338a:c432/64
IP6.ADDRESS[2]:                         fe80::5b26:3a6e:e716:e310/64
IP6.GATEWAY:                            fe80::1
IP6.ROUTE[1]:                           dst = fe80::/64, nh = ::, mt = 1024
IP6.ROUTE[2]:                           dst = 240e:1b1:18b1:4020::/64, nh = ::, mt = 100
IP6.ROUTE[3]:                           dst = ::/0, nh = fe80::1, mt = 100
IP6.DNS[1]:                             fe80::1

GENERAL.DEVICE:                         lo
GENERAL.TYPE:                           loopback
GENERAL.HWADDR:                         00:00:00:00:00:00
GENERAL.MTU:                            65536
GENERAL.STATE:                          100 (connected (externally))
GENERAL.CONNECTION:                     lo
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
IP4.ADDRESS[1]:                         127.0.0.1/8
IP4.GATEWAY:                            --
IP6.ADDRESS[1]:                         ::1/128
IP6.GATEWAY:                            --

GENERAL.DEVICE:                         wlan0
GENERAL.TYPE:                           wifi
GENERAL.HWADDR:                         DC:A6:32:87:E1:A7
GENERAL.MTU:                            1500
GENERAL.STATE:                          30 (disconnected)
GENERAL.CONNECTION:                     --
GENERAL.CON-PATH:                       --
IP4.GATEWAY:                            --
IP6.GATEWAY:                            --

GENERAL.DEVICE:                         p2p-dev-wlan0
GENERAL.TYPE:                           wifi-p2p
GENERAL.HWADDR:                         (unknown)
GENERAL.MTU:                            0
GENERAL.STATE:                          30 (disconnected)
GENERAL.CONNECTION:                     --
GENERAL.CON-PATH:                       --

访问外网：

$ curl --ipv6 --max-time 30 -v ip.sb
*   Trying [2606:4700:20::681a:c1f]:80...
* ipv6 connect timeout after 14918ms, move on!
*   Trying [2606:4700:20::681a:d1f]:80...
* ipv6 connect timeout after 7459ms, move on!
*   Trying [2606:4700:20::ac43:4bac]:80...
* Connection timed out after 30000 milliseconds
* Closing connection 0
curl: (28) Connection timed out after 30000 milliseconds

路由设置：

$ ip -6 route
240e:1b1:18b1:4020::/64 dev eth0 proto ra metric 100 pref medium
fe80::/64 dev eth0 proto kernel metric 1024 pref medium
default via fe80::1 dev eth0 proto ra metric 100 pref medium

Ping Windows 设备：

$ ping 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432
PING 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432(240e:1b1:18b1:4020:a8f9:a6e4:338a:c432) 56 data bytes
64 bytes from 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432: icmp_seq=1 ttl=64 time=0.137 ms
64 bytes from 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432: icmp_seq=2 ttl=64 time=0.059 ms
64 bytes from 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432: icmp_seq=3 ttl=64 time=0.062 ms
64 bytes from 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432: icmp_seq=4 ttl=64 time=0.057 ms
64 bytes from 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432: icmp_seq=5 ttl=64 time=0.064 ms
64 bytes from 240e:1b1:18b1:4020:a8f9:a6e4:338a:c432: icmp_seq=6 ttl=64 time=0.074 ms