芯片软件表与硬件表的作用与区别
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它的SDK里有篇文档讲的很清楚，你去看一下就明白了。
给你参考一下:
Purpose of L2 Shadow Table
In some applications it may be desirable for ethernet switch software to
keep an L2 (ARL) Shadow Table, which is a copy of the hardware L2 lookup
table in host memory that is kept up to date as closely as possible.
Some possible uses for an L2 shadow table are:
* Software L2 address resolution for packet transmission and ARP lookup
* SNMP "get" and "get next" operations.
* Maintaining synchronized ARLs across multiple chips in a system.
给你参考一下:
Purpose of L2 Shadow Table
In some applications it may be desirable for ethernet switch software to
keep an L2 (ARL) Shadow Table, which is a copy of the hardware L2 lookup
table in host memory that is kept up to date as closely as possible.
Some possible uses for an L2 shadow table are:
* Software L2 address resolution for packet transmission and ARP lookup
* SNMP "get" and "get next" operations.
* Maintaining synchronized ARLs across multiple chips in a system.
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