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If you want to use the old router as just a switch you will need to login into the router and disable the routing section and DHCP. You can then use the other ports as a switch but you must leave the WAN port, that went to the modem, open.
If this leaves you enough ports for all your wired devices plus the cable to the wireless router then it should work.
The cable to the modem must be connected to the wireless router though
You can also buy a wireless externder an leave the wireless router downstairs
Okay, those are good options, but the first one sounds a little complicated, so it looks like you've already sent a link to an extender.
yes and not all routers will allow you to fully disable the routing section
Okay, seems like a shame to buy an extender for this nice router. So I may do some rewiring--or try to go all wireless in the house. Thanks.
you can also just try moving it around within a few feet where it is. SOmetime just getting it out of the way of large metal objects helps
Yeah, moving it closer to the stairwell might do it. Great Idea. I'll log off, and thanks.