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I have RoadRunner Internet cable service hooked to a Motorola Surfboard modem. This is connected to a 10/100 wireless router (located in the garage).

Downstairs, I have a ZyXEL GS-108b gigabit switch connected to one port on the router. From this switch I ran connections to a PS3, DVR, Vonage box and a wireless router (Buffalo AirStation 10/100). The Buffalo AirStation works as a wireless AP for other laptops, iPads and cell phones.

Upstairs, I have an Asus gigabit switch connected to a gaming desktop, printer, and a media server on FreeNAS (PS3 Media Server on FreeNAS). The router is configured to assign static IPs to both the PS3 and the media server.

I connect a laptop to the switch downstairs after disabling the wireless, thus making sure that I am accessing internet through the wired connection (and the router in the garage). All my computers, iPads and cell phones are able to connect to the internet without a problem.

My PS3 connects to the Internet with a wired connection but is unable to access the media server (I get a message that no media server is found). I used a wired laptop downstairs (connected to switch downstairs) but am unable to ping either the PS3 or media server.

The primary router (one in garage) shows in the status page a subnet mask as 255.255.240.0 This the the one assigning DHCP addresses to my desktop and laptops. Surprisingly, when I check the config of my laptop (ipconfig /all) I see the subnet mask as 255.255.255.0. My PS3 and media server also show the same subnet mask (255.255.255.0)

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How does the Asus gigabit switch upstairs connect to the main router in the garage? Are you sure that Asus device is just a switch and not a router (which model is it)? Make sure to disable NAT and DHCP on your AirStation so it's just a bridging AP and not potentially providing DHCP service on your LAN (in case you hooked it up wrong). –  Spiff Jun 30 '12 at 9:00
    
Make sure you are only using the WAN port for the connection to the surfboard modem. All the other equipment needs to use the LAN side or else you specifically blacked them from each other. –  wbeard52 Jun 30 '12 at 14:04

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