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Re: [lwip-users] Randomly delayed frame (STM32070 package including LwIP

From: stevestrong
Subject: Re: [lwip-users] Randomly delayed frame (STM32070 package including LwIP v1.4.1)
Date: Thu, 3 Jan 2019 01:06:02 -0700 (MST)

Thank you Simon for taking time to answer.

Here is a capture with both Tx and Rx DHCP accesses.
dhcp4.jpg <http://lwip.100.n7.nabble.com/file/t2167/dhcp4.jpg>  

Everything seems to be fine till frame 67, after DHCP ACK from the router
I find weird that LwIP makes 3 more ARP inquiries *after the IP address has
been already ACK-ed*.
The router already did the ARP inquiry in frame 28, so why does LwIP the
same again?
Is tis OK?

Furthermore, the third ARP inquiry from LwIP (frame 91) seems to be useless
as it does not wait another 500 ms for an answer, but within 3 ms send the
DHCP release.
Is this OK?

Even more weird, 3 more ARP inquiries follow (in second ticks) after the
DHCP release.
Is this also OK?

Or is maybe is time to correct something in my lwipopt.h?
lwipopts.h <http://lwip.100.n7.nabble.com/file/t2167/lwipopts.h>  

Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html

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