I was having a few problems getting the Extreme to recognize my Epson 7600 printer on the network. It worked at first, but disappeared when I tried printing from it again. Mind you, I am not connecting the printer to the USB connection of the Extreme. The printer has an ethernet print server card installed in it, and that is connected to one of the ethernet ports on the Extreme. Anyways the key is to give the printer a static IP address. I was able to do it on my Netgear, but I didn’t know if the Extreme had the ability. It does.

1. Open Airport Utility
2. Click Internet
3. Click DHCP
4. Go to the bottom section labeled DHCP Reservations. Click the + symbol.
5. Think of a description and fill in the description field.
6. Choose the Reserve by MAC address radio button.
7. Click Continue.
8. Find the MAC address off the ethernet print server card, fill in the MAC address field.
9. Choose an IP address you’d like to reserve.
10. Click Done.

This solution seemed to work for me.