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发明授权
CN101572665B IPv6overIPv4隧道切换方法及设备 失效 - 权利终止

IPv6overIPv4隧道切换方法及设备
摘要：
本发明公开了IPv6 over IPv4隧道切换方法及设备。方法包括：隧道源端设备根据预设的IPv6 over IPv4隧道优先级计算规则计算各条隧道的初始优先级；当隧道源端设备要发送IPv6报文时，查找可传输该报文的可用隧道，在可用隧道中选择当前优先级最高的隧道发送该IPv6报文；当隧道源端设备接收到针对所选择的隧道的ICMPv4不可达消息时，将该隧道的当前优先级降低。本发明实现了IPv6 over IPv4隧道切换。
摘要（英）：

The invention discloses an IPv6 over IPv4 tunnel switching method and a device. The method includes: a tunnel source device calculates initial priority of each tunnel according to preset IPv6 over IPv4 tunnel priority calculation rule; when the tunnel source device is about to send an IPv6 message, available tunnels capable of transporting the message are searched, and the IPv6 message is sent bythe tunnel with the highest priority in the available tunnels; and when the tunnel source device receives an ICMPv4 unreachable message direct to the selected tunnel, the current priority of the tunnel is reduced. The invention realizes the IPv6 over IPv4 tunnel switching.

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