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    • 3. 发明授权
    • Systems and methods for disseminating addresses in distributed switching environments
    • 在分布式交换环境中传播地址的系统和方法
    • US09319317B1
    • 2016-04-19
    • US14170055
    • 2014-01-31
    • Derek Martin SpadaroMark Christian RudolphTimothy James Schlichter
    • Derek Martin SpadaroMark Christian RudolphTimothy James Schlichter
    • H04L12/28H04L12/741
    • H04L45/745
    • In a distributed switching environment, a plurality of switches are clustered together to form a stack, and it is generally desirable for forwarding tables, such as MAC tables, to be synchronized so that their mappings are consistent. When a switch receives a packet having a source address (e.g., MAC address) that is unknown, the switch is configured to disseminate the source address to the other switches of the stack. Rather than using software protocols to disseminate the source address, the switch instead transmits a multicast packet that (1) includes the unknown source address and (2) spoofs the other switches into believing that the packet was received on the same port from which the unknown source address was received on ingress to the stack. Thus, the other switches learn the unknown source address in hardware without having to rely on software for updating their forwarding tables.
    • 在分布式交换环境中,多个交换机被聚集在一起以形成堆栈,并且通常期望将诸如MAC表之类的转发表同步以便它们的映射是一致的。 当交换机接收到具有未知的源地址(例如,MAC地址)的分组时,交换机被配置为将源地址传播到堆叠的其他交换机。 而不是使用软件协议来传播源地址,而是切换发送(1)包括未知源地址的组播分组,以及(2)欺骗其他交换机,以相信该分组在未知的相同端口上被接收 源地址在入口处收到。 因此,其他交换机在硬件中学习未知源地址,而不必依赖软件来更新其转发表。