Why cannot a DAI-enabled switch forward valid ARP packets at line rate

In earlier versions of V200R001, a DAI-enabled switch checks ARP packets based on ACL rules delivered to the chip. Therefore, packets are directly forwarded at line rate. In V200R001 and later versions, the DAI-enabled switch checks ARP packets and forwards valid ARP packets using software. The forwarding rate depends on the CIR value of the ARP packet and CPU usage.

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