I have a RB3011UiAS-RM that only seems to accept traffic from devices that have obtained a DHCP address from it. Anything statically configured cannot so much as ping the router, even if the configured address is within the DHCP pool. As soon as we switch the address to DHCP, the router responds to traffic from the device.
Thoughts?
In the interface settings, set ARP to enabled (or arp-proxy if your Mikrotik is a VPN Server). You probably have arp set to reply only.
Reply Only is a feature that prevents devices with statically set IPs from communicating on the network. For a statically set IP, you’d have to then manually the mac address to the arp table. When arp is set to reply only, then only the Mikrotik will ever respond to arp requests.
