Hello Sprout,
When the address pool detects a conflicting IP, it will allocate other free IP addresses to avoid IP conflicts in the network. It is a protection against network IP conflicts and generally does not require attention.
There are usually two possible reasons:
1. The user manually configured a static IP address. However, the DHCP server does not exclude the IP address from the address pool, causing a conflict.
Locating method: Ping the conflicting IP from the DHCP server. If the IP address can be pinged, search for the ARP entry of the IP address and the corresponding MAC address to check whether a static IP address is configured for the MAC address.
Solution: Run the excluded-ip-address command to exclude the IP address from the address pool.
2. The address pool information has been cleared. For example, after the device is powered off and restarted, the address pool is reset, or the address pool is deleted, the address pool information is cleared.
Locating method: View device logs, search for keywords such as reset and ip pool, and check whether the address pool is cleared or deleted.
Solution: If the device needs to be restarted, run the dhcp server database enable command to save the address pool information to the hard disk, and run the dhcp server database recover command to restore the address pool information when the device is restarted. If the IP address pool is reset or deleted, the IP address is automatically released after the lease expires.
Any further questions, let us know!
