Ethernet-attached printer gets static IP but can't be pinged??

I have a network printer, plugged in via Ethernet cable to port #3 on the Extender. The printer is listed on the Attached Devices tab when I admin the Extender, and its virtual MAC address has been added to my Allow list on the router. I can also see this printer (at its static IP, 10.0.1.109) via LanScan from a computer on my main network (wired to the router). So, I know the printer got to the Extender and out to the main router. But when I ping this address it says Request timeout, and none of my printer configuration utilities can seem to reach it. What do I do - why is the printer unreachable even though it appears to have gotten its static IP address and the main router knows about it?