I have a flat single LAN network with no other DHCP servers, and even have the LAN VLAN configured with "Legal DHCP Servers" set to the IP of the ER707 IP (192.168.4.1). Starting with in the last...

@Clive_A Disabling IPv6 DNS did indeed fix this issue - as soon as the switch received *just* the A response and not the AAAA it stopped making further requests. I guess this explains the...

@Clive_A This goes back to the tcpdump - the switch queries for both A and AAAA records, and the DNS server responds with both...

@Clive_A I rebooted it, when coming up, it connects to pool[dot]ntp[dot]org (must be hard coded?) and then as soon as it is up it returns to querying my configured cloudflare ntp server every 8...

@Clive_A Thank you! I updated both switches last night to the attached firmware and my controller now shows: SG2008P v3.20: 3.20.9 Build 20250304 Rel.77614 SG2210MP v4.20: 4.20.10 Build 20250304...

@Clive_A Thank you! Do you know if SG2008P v3.20 and SG2210MP v4.20 firmware is available? The SG2210MP seems to be available for v5 hardware only and SG2008P is not available at all. Unfortunately...