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。

讯享网

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：

# /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 

讯享网#/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

讯享网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