S5560S-SI IPV6与电信光猫对接问题

设备：

电信光猫

华三S5560S-SI Release 6351P03

网络环境：

电信企业光猫拨号获得公网IPV4\IPV6，光猫有wifi+lan口（属于同网段）。其中光猫lan1口下挂H3C S5560S-SI的g1/0/24。

光猫有写回程IPV4路由，故现网IPV4网络正常。

光猫WIFI下终端IPV4/IPV6可正常访问互联网

问题：

S5560S-SI Release 6351P03下VLAN160的终端IPV6异常，无法通过IPV6访问互联网。

S5560S-SI配置（精简）：

interface Vlan-interface160  （IPV4可访问互联网，IPV6无法访问互联网）
 description IPV4/IPV6-test
 ip address 10.18.16.1 255.255.255.0
 dhcp select relay
 dhcp relay server-address 10.18.12.230
 ipv6 dhcp select server
 ipv6 address 2 240E:35C:A0D:FD00:1600::1000/80
 ipv6 nd autoconfig managed-address-flag
 ipv6 nd autoconfig other-flag
 undo ipv6 nd ra halt
 ipv6 nd ra dns server 240C::6666 infinite sequence 1

interface GigabitEthernet1/0/24 (接光猫LAN1口)
 port link-mode route
 description to_WAN_chinatelecom_internet_192.168.1.1
 ip address 192.168.1.3 255.255.255.0
 ipv6 address auto
 undo ipv6 nd ra halt

说明：

1.IPV4静态路由省略，因IPV4网络正常。

2.IPV6静态路由未配置。

3.在H3C S5560S-SI上执行dis ipv6 int brief，结果如下

[asca]dis ipv6 int brief
*down: administratively down
(s): spoofing
Interface                                 Physical Protocol IPv6 Address
GigabitEthernet1/0/24                     up       up       240E:35C:A0D:FD00:7257:BFFF:FEE1:5F0
Vlan-interface160                         up       up       240E:35C:A0D:FD00:1600::1000
4.在H3C S5560S-SI上执行ping ipv6 240c::6666网络可达，结果如下

[asca]ping ipv6 240c::6666
Ping6(56 data bytes) 240E:35C:A0D:FD00:7257:BFFF:FEE1:5F0 --> 240C::6666, press CTRL+C to break
56 bytes from 240C::6666, icmp_seq=0 hlim=53 time=18.513 ms
56 bytes from 240C::6666, icmp_seq=1 hlim=53 time=17.761 ms
56 bytes from 240C::6666, icmp_seq=2 hlim=53 time=18.015 ms
56 bytes from 240C::6666, icmp_seq=3 hlim=53 time=23.046 ms
56 bytes from 240C::6666, icmp_seq=4 hlim=53 time=17.918 ms

--- Ping6 statistics for 240c::6666 ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 17.761/19.051/23.046/2.013 ms
5.在H3C S5560S-SI上执行dis ipv6 routing-table

[asca]dis ipv6 routing-table

Destinations : 16       Routes : 16

Destination: ::/0                                        Protocol  : Direct
NextHop    : FE80::1                                     Preference: 80
Interface  : GE1/0/24                                    Cost      : 0

Destination: ::1/128                                     Protocol  : Direct
NextHop    : ::1                                         Preference: 0
Interface  : InLoop0                                     Cost      : 0

Destination: 240E:35C:A0D:FD00::/64                      Protocol  : Direct
NextHop    : ::                                          Preference: 0
Interface  : GE1/0/24                                    Cost      : 0

Destination: 240E:35C:A0D:FD00:1600::/80                 Protocol  : Direct
NextHop    : ::                                          Preference: 0
Interface  : Vlan160                                     Cost      : 0

Destination: 240E:35C:A0D:FD00:1600::1000/128            Protocol  : Direct
NextHop    : ::1                                         Preference: 0
Interface  : InLoop0                                     Cost      : 0

Destination: 240E:35C:A0D:FD00:7257:BFFF:FEE1:5F0/128    Protocol  : Direct
NextHop    : ::1                                         Preference: 0
Interface  : InLoop0                                     Cost      : 0

经测试：

1.终端获得了IPV6地址，与vlan160网关通，但依然无法访问IPV6互联网