DHCP errors with RouterOS v6.46.4

RouterOS General
1

Hello

After upgrading to V6.46.4 I’ve noticed several DHCP errors on the log, trying to offer lease to MAC addresses that seem to belong to the router itself ! Here is a sammary of the information gathered so far:

  • Router RB3011UiAS running v6.46.4 and primary MAC address B8:69:F4:9D:64:96
  • Two internal subnets: 192.168.0.0/24 and 172.16.0.0/20, both with DHCP servers and pools
  • Log shows the following messages every 2 seconds:
  • dhcp, warning - dhcp1 offering lease 192.168.0.52 for B2:97:24:92:2B:15 without success
    • dhcp, warning - dhcp1 offering lease 192.168.0.51 for B8:69:F4:9D:64:97 without success
  • On the DHCP Server leases windows, both addresses show as “offered” and the Active Host Name points back to the RB3011UiAS (Named “Gatekeeper”)

Any hints on what may be causing this behavior?

Best Regards
Maurício
DHCP errrors - addresses offered.png
DHCP errrors - log addresses offered.png
Mikrotik RouterOS Version.png

2

One more information: one of the two MAC addresses belongs to the RB3011 bridge that is responsible for subnet 2 of our network (172.16.0.0/20). Why on Earth the bridge would ask for a DHCP address (has a fixed address of 172.16.0.1/20) and why would RouterOS try to attend the request using the pool for the first subnet (192.168.0.0/24)?

Regards
Maurício