Same MAC addr, but received 2 different IPs

Hello guys,
I am using the OPENWRT with R21.6.1, and everything works fine but I just found out that my desktop was addressed 2 different IPs, which was as following:


but my desktop just own only single Ethernet Card, how could this happen and be solved?

thanks in advance!

It could be a stale lease, so reboot the router and check again.

I have rebooted the router for several times, but the issue remains still, and here is the system log:

Tue Aug 17 03:10:48 2021 user.notice nft-qos-monitor: ACTION=update, MACADDR=40:8d:5c:b8:b8:18, IPADDR=192.168.5.141, HOSTNAME=
Tue Aug 17 03:10:48 2021 user.notice nft-qos-dynamic: ACTION=update, MACADDR=40:8d:5c:b8:b8:18, IPADDR=192.168.5.141, HOSTNAME=
Tue Aug 17 03:10:48 2021 user.notice nft-qos-monitor: ACTION=update, MACADDR=40:8d:5c:b8:b8:18, IPADDR=192.168.5.142, HOSTNAME=DESKTOP-54JO2M3
Tue Aug 17 03:10:48 2021 user.notice nft-qos-dynamic: ACTION=update, MACADDR=40:8d:5c:b8:b8:18, IPADDR=192.168.5.142, HOSTNAME=DESKTOP-54JO2M3

and here is what my desktop get from the router:
image

funny thing is that I gained the 141 IP instead of 142 which is supposed to be the same as the log shown...weired..

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If possible, check whether the issue is relevant for other clients.

so far as I observed, only my desktop is facing this headache.. :coffee:

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Then the problem is most likely unrelated to OpenWrt.

but how is it possible for openwrt to address 2 different IPs to the same MAC address, that doesn't make sense at all.. confusing :thinking:

Check the output from the router:

ubus call system board; uci show dhcp; cat /tmp/dhcp.leases

Here are the outpouts, and thanks for your help, my friend:
image

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Unfortunately, this is not an official build, so it's best to ask its author.
But since this happens with only one PC, it might be some race condition in its network driver.

I don't think I could find the author, but thank you so much anyway, have a good day!

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