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openwrt 设置ipv6地址分配
January 24, 2022

一般家宽有以下两种模式，设置略有差异

A: openwrt路由器接入光猫，光猫拨号

1 lan 口开启ipv6前缀委派,ipv6 dhcp设置为中继模式，

web 配置

lan dhcpv6
或 cli下修改 /etc/config/dhcp 


config dhcp 'lan'
        option interface 'lan'
        option dhcpv6 'relay'
        option ndp 'relay'
        option ra 'relay'
        list ra_flags 'none'
config dhcp 'wan'
        option interface 'wan'
        option ignore '1'
        option ra 'relay'
        option dhcpv6 'relay'
        option ndp 'relay'
        option master '1'
        list ra_flags 'none'

2 wan 口的ipv6设置如下

web端 wan 口要开启ipv6前缀委派
wan options
wan6 开启dhcpv6 client
wan6 dhcpv6
wan 口上的dhcp要开启中继模式，且申明为主接口，启用路由学习
wan dhcpv6

B: openwrt直接拨号，光猫运行为桥接模式

跟上面的路由模式大体相同，不同在于以下部分
lan口要关闭ipv6前缀委派，dhcpv6要开启路由广播服务器模式
lan options

或者cli下设置


config dhcp 'lan'
        option interface 'lan'
        option dhcpv6 'relay'
        option ndp 'relay'
        option ra 'server'
        list ra_flags 'none'
config dhcp 'wan'
        option interface 'wan'
        option ignore '1'
        option ra 'relay'
        option master '1'
        option dhcpv6 'relay'
        option ndp 'relay'
        list ra_flags 'none'
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