gd 020 电信 ipv6 是假的？

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直接光猫里面获取到了 v6 telnet 进去管理发现 ping6 不通，更不要说进来的了。。。

# ping6 2001:da8:8000:1::80
PING 2001:da8:8000:1::80 (2001:da8:8000:1::80): 56 data bytes
--- 2001:da8:8000:1::80 ping statistics ---
4 packets transmitted, 0 packets received, 100% packet loss

# ifconfig ppp1.3
ppp1.3    Link encap:Point-to-Point Protocol  
          inet addr:100.64.2.95  P-t-P:100.64.0.1  Mask:255.255.255.255
          inet6 addr: 240e:3b0:a95:18e:a01:fe1:983d:XXXX/64 Scope:Global
          inet6 addr: fe80::a01:fe1:983d:XXXX/10 Scope:Link
          UP POINTOPOINT RUNNING NOARP ALLMULTI MULTICAST  MTU:1492  Metric:1

# ip6tables -L -n 
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     icmpv6    ::/0                 ::/0                
ACCEPT     icmpv6    ::/0                 ::/0                 ipv6-icmptype 130
ACCEPT     all      ::/0                 ::/0                 ctstate RELATED,ESTABLISHED

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all      ::/0                 ::/0