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CC3235MODASF: Delayed TCP ACK while receiving ARP request

Part Number: CC3235MODASF

Tool/software:

Hello expert,

I received one issue from my customer.

The system is as follows.

CC3235MODASF [192.168.0.1] (Wi-Fi) AP (Ethernet)→ Customer products [192.168.0.5]
                                          (Ethernet) PC [192.168.0.3/Elecom_ff:ee:25]

Please Refer to No. 52585 to 52587 of wireshark log.

If the Wi-Fi module receives an ARP request from the PC just before customer product sends the data as the TCP packet,

the Wi-Fi module may not send TCP ACK to customer product until it responds to the ARP.

Can you please advise how to avoid this issue?

 

Regards,

A.Fujinaka