在路由器上配置IPV6（下）－－配置GRE使IPV6在IPV4环境下通信

  R1 conf t ipv uncast-routing int l 0 ip ad 1.1.1.1 255.255.255.255 int s 2/0 ip ad 10.1.1.1 255.255.255.0 encap f no arp f no frame inver frame map ip 10.1.1.2 102 b no shut int f 0/0 ipv ad fec0:0:

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