家用带宽二级路由openwrt设置ipv6
拓扑结构，中国移动家庭智能网关GS3101 + OpenWrt GCC 5.3.0 12009
GS3101 为一级主路由，是光猫直接拨号，通过GS3101到一个lan口接到openwrt的wan口。其中分配给gs3101网关的ipv6前缀是60位,二级路由获取到该前缀后，给二级路由下属设备分配的前缀是64位
成功的配置需要确保你的二级路由器获得的ipv6的前缀是64而不是128。
gs3101网关设置如下：
默认登录用户名CMCCAdmin，密码aDm8H%MdA
如果自动分配不成功，则自己分配，注意前缀必须和家庭网关状态里面的前缀相同，前缀长度大于60即可：
我openwrt用ssh连上后用vim设置如下：
开头注释那行为路径
# /etc/config/firewall
config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward ACCEPT
# Uncomment this line to disable ipv6 rules
# option disable_ipv6 1
config zone
option name lan
list network 'lan'
option input ACCEPT
option output ACCEPT
option forward ACCEPT
config zone
option name wan
list network 'wan'
list network 'wan6'
option input ACCEPT
option output ACCEPT
option forward ACCEPT
option masq 1
option mtu_fix 1
config forwarding
option src lan
option dest wan
config forwarding
option src wan
option dest lan
# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
option name Allow-DHCP-Renew
option src wan
option proto udp
option dest_port 68
option target ACCEPT
option family ipv4
# Allow IPv4 ping
config rule
option name Allow-Ping
option src wan
option proto icmp
option icmp_type echo-request
option family ipv4
option target ACCEPT
config rule
option name Allow-IGMP
option src wan
option proto igmp
option family ipv4
option target ACCEPT
# Allow DHCPv6 replies
# see https://dev.openwrt.org/ticket/10381
config rule
option name Allow-DHCPv6
option src wan
option proto udp
option src_ip fc00::/6
option dest_ip fc00::/6
option dest_port 546
option family ipv6
option target ACCEPT
config rule
option name Allow-MLD
option src wan
option proto icmp
option src_ip fe80::/10
list icmp_type '130/0'
list icmp_type '131/0'
list icmp_type '132/0'
list icmp_type '143/0'
option family ipv6
option target ACCEPT
# Allow essential incoming IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Input
option src wan
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
list icmp_type router-solicitation
list icmp_type neighbour-solicitation
list icmp_type router-advertisement
list icmp_type neighbour-advertisement
option limit 1000/sec
option family ipv6
option target ACCEPT
# Allow essential forwarded IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Forward
option src wan
option dest *
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
option limit 1000/sec
option family ipv6
option target ACCEPT
# include a file with users custom iptables rules
config include
option path /etc/firewall.user
### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
# option src lan
# option src_ip 192.168.45.2
# option dest wan
# option proto tcp
# option target REJECT
# block a specific mac on wan
#config rule
# option dest wan
# option src_mac 00:11:22:33:44:66
# option target REJECT
# block incoming ICMP traffic on a zone
#config rule
# option src lan
# option proto ICMP
# option target DROP
# port redirect port coming in on wan to lan
#config redirect
# option src wan
# option src_dport 80
# option dest lan
# option dest_ip 192.168.16.235
# option dest_port 80
# option proto tcp
# port redirect of remapped ssh port (22001) on wan
#config redirect
# option src wan
# option src_dport 22001
# option dest lan
# option dest_port 22
# option proto tcp
# allow IPsec/ESP and ISAKMP passthrough
config rule
option src wan
option dest lan
option proto esp
option target ACCEPT
config rule
option src wan
option dest lan
option dest_port 500
option proto udp
option target ACCEPT
### FULL CONFIG SECTIONS
#config rule
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 80
# option dest wan
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
# option target REJECT
#config redirect
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 1024
# option src_dport 80
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
#/etc/config/network
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd86:c80c:828a::/48'
config interface 'lan'
option type 'bridge'
option ifname 'eth0'
option proto 'static'
option ipaddr '192.168.2.1'
option netmask '255.255.255.0'
option ip6assign '64'
config interface 'wan'
option ifname 'eth1'
option proto 'dhcp'
config interface 'wan6'
option ifname 'eth1'
option proto 'dhcpv6'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '1 2 3 4 0'
#/etc/config/dhcp
config dnsmasq
option domainneeded '1'
option boguspriv '1'
option filterwin2k '0'
option localise_queries '1'
option rebind_protection '1'
option rebind_localhost '1'
option local '/lan/'
option domain 'lan'
option expandhosts '1'
option nonegcache '0'
option authoritative '1'
option readethers '1'
option leasefile '/tmp/dhcp.leases'
option resolvfile '/tmp/resolv.conf.auto'
option localservice '1'
config dhcp 'lan'
option interface 'lan'
option start '100'
option limit '150'
option leasetime '12h'
option dhcpv6 'relay'
option ra 'relay'
option ndp 'relay'
config dhcp 'wan'
option interface 'wan'
option ignore '1'
config dhcp 'wan6'
option interface 'wan'
option dhcpv6 'relay'
option ra 'relay'
option ndp 'relay'
option master '1'
config odhcpd 'odhcpd'
option maindhcp '0'
option leasefile '/tmp/hosts/odhcpd'
option leasetrigger '/usr/sbin/odhcpd-update'
另外还设置了ip6tables
ip6tables -F
ip6tables -X
ip6tables -P INPUT ACCEPT
ip6tables -P OUTPUT ACCEPT
ip6tables -P FORWARD ACCEPT
设置完需要重启网络，防火墙，odhcpd
/etc/init.d/network reload
/etc/init.d/firewall reload
/etc/init.d/odhcpd restart
设置完毕，可能你在二级设备下要上网的设备需要ping一次家庭网关以建立链路刷新邻居表，登录管理页面状态，获得家庭网关的ipv6地址，然后macos或者Linux使用ping6命令ping即可。
windows使用ping -6命令。