IPv6连接超时

我在IPv6连接方面遇到问题。只有那些。他们大约每10分钟超时一次（我想是由于地址更新所致）。

我在一年左右的时间内尝试过的各种基于debian的linux，x86和x64，可在不同的PC（有线和无线）上进行。

我目前正在使用Linux Mint 17.1，内核3.13.0-37-通用x86_64（以前是3.2.0-60）和NetworkManager 0.9.8.8。有时，当我尝试立即重新开始下载时，我收到“没有通往主机的路由”。因为我的IPv6地址似乎暂时消失了。
像这样：http : //pastebin.com/4Xida2qu

我正在运行双协议栈IPv4-IPv6（PPPoE），这是配置Netgear DGND3700v2路由器（固件版本V1.1.00.22_1.00.22）的方式：http ://i.imgur.com/YgxAyQb.png

有问题的网络配置文件设置为忽略IPv6，但无论如何我都在获取全局IPv6地址。更改为自动不会有任何区别。这很令人困惑，但是我想这只是内核在做它的工作。

防火墙规则或缺少防火墙规则没有任何区别，但它们基本上是：

iptables -P INPUT DROP
ip6tables -P INPUT DROP
iptables -P FORWARD DROP
ip6tables -P FORWARD DROP
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
ip6tables -A INPUT -i lo -j ACCEPT
ip6tables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
ip6tables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
ip6tables -I INPUT  -p icmpv6 -j ACCEPT

尝试使用DHCP代替LAN的autoconf进行尝试，现在我在Windows上没有超时，但是在Linux上没有ipv6连接（即使我似乎具有全局地址，但无论如何我都会遇到“网络无法访问”错误）。

tcpdump -vvni wlan0 icmp6输出的相关部分

无法到达目的地：

19:25:05.381081 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 88) {GW's ipv6 - redacted} > {My pc's ipv6 link-local addr - redacted}: [icmp6 sum ok] ICMP6, destination unreachable, beyond scope 2001:760:ffff:b1::34, source address {My pc's ipv6 link-local addr - redacted}
19:25:12.948944 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 88) {GW's ipv6 - redacted} > {My pc's ipv6 link-local addr - redacted}: [icmp6 sum ok] ICMP6, destination unreachable, beyond scope 2001:760:ffff:b1::34, source address {My pc's ipv6 link-local addr - redacted}
19:25:18.446900 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 88) {GW's ipv6 - redacted} > {My pc's ipv6 link-local addr - redacted}: [icmp6 sum ok] ICMP6, destination unreachable, beyond scope 2001:760:ffff:b1::34, source address {My pc's ipv6 link-local addr - redacted}

路由器请求：

19:25:18.775794 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 16) {Unknown link-local ipv6 addr - redacted} > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16
      source link-address option (1), length 8 (1): {Unknown MAC - redacted}
        0x0000:  {Unknown MAC - redacted}

路由器公告：

19:25:18.777825 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 112) {GW's ipv6 - redacted} > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 112
    hop limit 64, Flags [other stateful], pref medium, router lifetime 1800s, reachable time 30000s, retrans time 1000s
      prefix info option (3), length 32 (4): 2a01:2000:2001:91b1::/64, Flags [onlink, auto], valid time 360s, pref. time 360s
        0x0000:  40c0 0000 0168 0000 0168 0000 0000 2a01
        0x0010:  2000 2001 91b1 0000 0000 0000 0000
      unknown option (24), length 24 (3): 
        0x0000:  4000 0000 0168 2a01 2000 2001 91b1 0000
        0x0010:  0000 0000 0000
      rdnss option (25), length 24 (3):  lifetime 600s, addr: 2a01:2000:2001:91b1:861b:{Gateway}
        0x0000:  8800 0000 0258 2a01 2000 2001 91b1 861b
        0x0010:  {gateway MAC - redacted}
      mtu option (5), length 8 (1):  1492
        0x0000:  0000 0000 05d4
      source link-address option (1), length 8 (1): {gateway MAC - redacted}
        0x0000:  {gateway MAC - redacted}

我也时不时得到这样的东西，不知道它是否有任何重要性：

17:09:42.546840 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 1240) {GW's ipv6 - redacted} > {My pc's temp ipv6 addr - redacted}: [icmp6 sum ok] ICMP6, packet too big, mtu 1462

路由器的radvd.conf（使用telnet找到）

interface group1 {
    AdvSendAdvert on;
    AdvManagedFlag off;
    AdvOtherConfigFlag on;
    MaxRtrAdvInterval 600;
    MinRtrAdvInterval 198;
    AdvSourceLLAddress on;
    AdvReachableTime 30000;
    AdvRetransTimer 1000;
    AdvDefaultLifetime 1800;
    AdvCurHopLimit 64;
    AdvLinkMTU 1492;
    prefix 2a01:2000:2001:cd96::/64 {
        AdvPreferredLifetime 360;
        AdvValidLifetime 360;
        AdvOnLink on;
        AdvAutonomous on;
    };
    route 2a01:2000:2001:cd96::/64 {
            AdvRouteLifetime 360;
    };
    RDNSS 2a01:2000:2001:cd96:XXXX:XXXX:XXXX:XXXX  {
        AdvRDNSSOpen on;
    };
};