Some clients continue to request duplicate IP - Why?
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From reading through this forum, I understand this is not a problem and it is noise in the logs. Specifically, I'm referring to log events like this one:
uid lease 10.57.90.130 for client ac:04:0b:6b:12:67 is duplicate on 10.57.90.0/24
I see a bunch of those events, from various different types of clients, in my logs. There's the
is duplicate
event getting logged, followed by a REQUEST and then an ACK.uid lease 10.57.90.130 for client ac:04:0b:6b:12:67 is duplicate on 10.57.90.0/24 DHCPREQUEST for 10.57.90.81 from ac:04:0b:6b:12:67 via lagg0.90 DHCPACK on 10.57.90.81 to ac:04:0b:6b:12:67 via lagg0.90
Here's what I don't understand... why is the client (or pfSense) referencing
10.57.90.130
for that client in theis duplicate
log message? I have a static DHCP entered for this MAC address, and it should only be offered10.57.90.81
as the IP address. So why is10.57.90.130
showing up in my logs?10.57.90.130
doesn't exist in my DHCP leases. I've restarted DHCPD and rebooted pfSense without seeing things change.If I remove my static DHCP reservation, the
is duplicate
log message go away for that device, and the device gets the10.57.90.130
IP address. But why is the device asking for that IP address? How does it even know that IP address is available within the DHCP dynamic pool?