Gretap实现IPv6跨网分配

客户端ip： 192.168.33.12

服务端ip：192.168.35.5

客户端和服务端三层可达。

服务端建立gretap：

ip l a ngretap type gretap local 192.168.35.5 remote 192.168.33.12
ip l set dev ngretap up

客户端建立gretap:

ip l a ngretap type gretap local 192.168.33.12 remote 192.168.35.5
ip l set dev ngretap up

服务端上拨号，dhcpv6配置(/etc/wide-dhcpv6/dhcp6c.conf)如下：

profile default
{
  information-only;

  request domain-name-servers;
  request domain-name;

  script "/etc/wide-dhcpv6/dhcp6c-script";
};

interface pppoe_dial {
        send ia-na 0;
        request domain-name-servers, domain-name;
        send rapid-commit;
        send ia-pd 0;
};

id-assoc na 0 {};

id-assoc pd 0 {
        prefix ::/60 infinity;
        prefix-interface ngretap {
                sla-id 1;
                sla-len 4;
                ifid 1;
        };
};

/etc/radvd.conf:

interface ngretap
{
        AdvSendAdvert on;

        MinRtrAdvInterval 3;
        MaxRtrAdvInterval 10;
        AdvDefaultPreference low;
        AdvHomeAgentFlag off;

        prefix ::/64
        {
                AdvOnLink on;
                AdvAutonomous on;
                AdvRouterAddr off;
        };

};