多层交换机是结合了2层交换和3层路由功能的一种交换机。
利用多层交换机，智能可以从网络核心分布到台式设备上。
With multilayer switches, intelligence can be distributed from the network core to the desktop.
例如，若某台多层交换机支持ip协议，ipx包则只能在第二层上交换，不能在第三层上规定路由。
For example, if a multilayer switch supports IP, then IPX packets can only be switched at layer 2 not routed at layer 3.
此外，BCM 56504是基于每秒可处理超过1亿包的72gbps包处理器，这一能力在集成多层交换机领域无可匹敌。
Additionally, the BCM56504 is based on a 72 Gbps packet processor that is capable of processing over 100 million packets per second, which is unrivaled for integrated multi-layer switches.
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