![路由不起作用](https://linux22.com/image/776201/%E8%B7%AF%E7%94%B1%E4%B8%8D%E8%B5%B7%E4%BD%9C%E7%94%A8.png)
我有两个接口wan0
和wg0
。路由表如下所示:
::1 dev lo proto kernel metric 256 pref medium
2a0c:xxx:yyy:zz00::/56 dev wg0 proto static metric 20 pref medium
2a0c:xxx::/32 dev wan0 proto kernel metric 256 pref medium
2a0c:xxx::/32 dev wan0 proto ra metric 1024 expires 2591957sec pref medium
fe80::/64 dev wan0 proto kernel metric 256 pref medium
default proto static metric 1024 pref medium
nexthop via 2a0c:xxx::1 dev wan0 weight 1
nexthop via fe80::****:****:****:3780 dev wan0 weight 1
当我尝试dns.google
从wg0
接口 ping 时,数据包没有重定向到接口wan0
。为什么?
接口上的 tcpdumpwg0
给出如下信息:
IP6 2a0c:xxx:yyy:zz60::wwww > dns.google: ICMP6, echo request, id 1, seq 5093, length 40
IP6 2a0c:xxx:yyy::1 > 2a0c:xxx:yyy:zz60::wwww: ICMP6, destination unreachable, unreachable address dns.google, length 88
IP6 2a0c:xxx:yyy:zz60::wwww > dns.google: ICMP6, echo request, id 1, seq 5094, length 40
IP6 2a0c:xxx:yyy:zz60::wwww > dns.google: ICMP6, neighbor solicitation, who has dns.google, length 26
IP6 2a0c:xxx:yyy:zz60::wwww > dns.google: ICMP6, neighbor solicitation, who has dns.google, length 26
IP6 2a0c:xxx:yyy:zz60::wwww > dns.google: ICMP6, neighbor solicitation, who has dns.google, length 26
IP6 2a0c:xxx:yyy::1 > 2a0c:xxx:yyy:zz60::wwww: ICMP6, destination unreachable, unreachable address dns.google, length 88
IP6 2a0c:xxx:yyy:zz60::wwww > dns.google: ICMP6, echo request, id 1, seq 5095, length 40
通过 ip -6 r get 检查路由显示正确路由(2001:4860:4860::8888 是 dns.google):
❯ ip -6 r get to 2001:4860:4860::8888 from 2a0c:xxx:yyy:zz60::wwww iif wg0
2001:4860:4860::8888 from 2a0c:xxx:yyy:zz60::wwww via 2a0c:xxx::1 dev wan0 proto static metric 1024 iif wg0 pref medium
有时数据包仍会被重定向到 wan0 接口,但这种情况很少发生。