NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
DHCP requests not logged consistently
My Orbi log files will show "DHCP IP" entries sometimes, and not other times. If I reboot my RBR50, then "DHCP IP" requests are logged, reboot again and they are NOT logged, reboot again and it starts logging them again. Is anyone else seeing this issue with their Orbi log files?
Example (last octets of real MAC address changed to X's):
[DHCP IP: 192.168.1.30] to MAC address cc:50:e3:xx:xx:xx, Sunday, March 08, 2020 16:04:11
[Access Control] Device ESP_XXXXXX with MAC address CC:50:E3:XX:XX:XX is allowed to access the , Sunday, March 08, 2020 16:04:11
Reboot RBR50, check log and it only shows this entry for the device:
[Access Control] Device ESP_XXXXXX with MAC address CC:50:E3:XX:XX:XX is allowed to access the , Sunday, March 08, 2020 16:13:15
Reboot the router again and "DHCP IP" entries are logged again.
Anyone else see this bug? I have all the checkboxes for logging selected.
7 Replies
Another observation is that when it is not logged DHCP IP requests, if I go to the Advanced -> Setup -> LAN Setup page and click Apply (without changing anything), the RBR50 appears to reset the DHCP server. This process takes almost 2 minutes, and it is not a reboot of the system since uptime (seen on the debug.htm page) shows it was not rebooted. Going back to viewing the logs, DHCP IP is again being logged.
So the I repeat this process, and go to the LAN Setup page again and click Apply without changing anything. After almost 2 minutes, the system web page is back, so I then check the logs and DHCP IP is still being logged. Hmm.
So then I go to the Advanced Home page and click the Reboot button. After about 3 minutes the router is back up, I log in and check the logs and DHCP IP is no longer being logged.
Anyone else able to duplicate this?
Interesting issue, mixing DHCP and Access Control. My guess is that the device in question did not actually renew the DHCP lease when the Orbi was rebooted. No renewal: no log entry.
DHCP is more complicated than I had ever imagined. When the device receives an IP assignment using DHCP, it knows how long the lease is for. There is no reason to ask for another until the proper time (when 1/2 of the lease time remains).
How about this test: When the Orbi is rebooted, also reboot the device.
I have had my systems log file not report any DHCP IP entries for days. Then once rebooted, I would see each device make the DHCP IP entry in the log file once every 12 hours, which mismatches the 24 lease time. That is another anomoly, anyone else seeing the "DHCP IP" entry every approximately 12 hours rather than 24 hours for each MAC address?
CrimpOn, I have rebooted devices after rebooting the router. When the RBR50 is not logging DHCP IP entries, the rebooted device and even any new device off for over 24 hours is not logged.
CrimpOn wrote:Interesting issue, mixing DHCP and Access Control. My guess is that the device in question did not actually renew the DHCP lease when the Orbi was rebooted. No renewal: no log entry.
DHCP is more complicated than I had ever imagined. When the device receives an IP assignment using DHCP, it knows how long the lease is for. There is no reason to ask for another until the proper time (when 1/2 of the lease time remains).
How about this test: When the Orbi is rebooted, also reboot the device.
