[openwrt]openwrt-21.02 MT7981 mwan3 ping IPv6出现 ping: sendto: Network unreachable问题分析及解决方案

问题描述

         MT7981 openwrt-21.02系统开启mwan3发现IPv6出现 Network unreachable

问题日志     

root@OpenWrt:/# ping 2400:3200:baba::1
PING 2400:3200:baba::1 (2400:3200:baba::1): 56 data bytes
ping: sendto: Network unreachable

问题分析

查看ip6tables规则

 发现没有异常

root@OpenWrt:/# ip6tables -t mangle -S
-P PREROUTING ACCEPT
-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
-P POSTROUTING ACCEPT
-N mwan3_connected
-N mwan3_hook
-N mwan3_ifaces_in
-N mwan3_policy_balanced
-N mwan3_policy_wan_only
-N mwan3_policy_wan_wanb
-N mwan3_policy_wanb_only
-N mwan3_policy_wanb_wan
-N mwan3_rule_https
-N mwan3_rules
-A PREROUTING -j mwan3_hook
-A FORWARD -o lan1 -p