Unknown Source IP 192.168.1.1 →X Source IP Source Port Destination IP Destination Port 192.168.1.1 1056 172.16.1.1 80 X Destination IP 10.1.1.1 does not exist Source IP Source Port Destination IP Destination Port 172.16.1.1 80 10.1.1.1 1056 TCP Session Node B 172.16.1.1 Local Network A Internet Local Network B 10.1.1.0/24 172.16.0.0/24 Node A 192.168.1.1 Local Network C 192.168.1.0/24
■移动主机改变P地址 ▣获取新网络的P地址 口TCP通信会话将终端(TCP会话失效)
◼ 移动主机改变IP地址 获取新网络的IP地址 TCP通信会话将终端（TCP会话失效）
■目标 口保持TCP会话有效性 ■保持移动主机的原P地址有效 ■技术手段 ▣Mobile IPv4 ▣Mobile IPv6 ▣Dual Stack Mobile IP IKEv2 Mobility and Multihoming Protocol
◼ 目标 保持TCP会话有效性 ◼ 保持移动主机的原IP地址有效 ◼ 技术手段 Mobile IPv4 Mobile IPv6 Dual Stack Mobile IP IKEv2 Mobility and Multihoming Protocol
Mobile IPv4 ■RFC2002,3344
Mobile IPv4 ◼ RFC 2002, 3344
Home Agent Virtual Network 10.1.1.0/24 ■Home network Home Network Intemet 10.1.0.0/16 Virtual network ■Foreign network ▣Visited network Visited Network 192.168.1.0/24 Foreign Network 192.168.1.0/24
◼ Home network ◼ Virtual network ◼ Foreign network Visited network