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    • 5. 发明授权
    • Method and apparatus for generating replies to address resolution protocol requests
    • 用于产生对地址解析协议请求的回复的方法和装置
    • US06697326B1
    • 2004-02-24
    • US09549945
    • 2000-04-14
    • Edward Glen BrittonMichael G. FitzpatrickJeffrey Douglas HaggarMaurice Isrel, Jr.Barton Clark Vashaw
    • Edward Glen BrittonMichael G. FitzpatrickJeffrey Douglas HaggarMaurice Isrel, Jr.Barton Clark Vashaw
    • H04L1226
    • H04L29/12018H04L29/12009H04L61/10
    • The invention ensures that a single and consistent reply is made to ARP request in a system of connected IP networks. In each host, the first adapter A to become active is designated as being in an arbitrary first physical network (PNET1). For each subsequent adapter B to become active on a host, the host sends a packet over one of the adapters (A) of each network already known to the host with a hop count of one. If the packet is received over adapter B, it is known that adapters A and B are in the same physical network. If this occurs, adapter B is marked as being in the same network PNET1 as adapter A. If the packet is not received over adapter B then B is in a different physical network as A. In this event, adapter B is marked as being in a new network PNET2. When adapter A becomes inactive, if there are other active adapters in the physical network to which A belongs, then one of the remaining adapters B in that physical network is designated to have the responsibility for replying to ARP requests for A. A gratuitous ARP advertisement is transmitted into the network mapping IP-A with MAC-B. When adapter A again becomes active, adapter A will re-assume ownership of ARP replies for IP address A.
    • 本发明确保在连接的IP网络的系统中对ARP请求进行单一一致的回复。 在每个主机中,要变为活动的第一适配器A被指定为在任意的第一物理网络(PNET1)中。 对于每个随后的适配器B在主机上变为活动状态,主机通过跳数为1的主机已知的每个网络的一个适配器(A)发送分组。 如果通过适配器B接收到分组,则知道适配器A和B处于相同的物理网络中。 如果发生这种情况,则适配器B被标记为与适配器A在同一个网络PNET1中。如果未通过适配器B接收到分组,则B与A处于不同的物理网络。在这种情况下,适配器B被标记为处于 一个新的网络PNET2。 当适配器A变为非活动状态时,如果物理网络中存在其他活动适配器,则该物理网络中剩余的适配器B之一被指定为对A的ARP请求进行回复的责任。无偿ARP广播 被传送到MAC-B映射IP-A的网络中。 当适配器A再次变为活动时,适配器A将重新承担IP地址A的ARP应答的所有权。