One of these days, I'll get around to writing that how-to, and stickying it....
I think I see two issues here:
- the Linksys router is still configured as, well, a router;
- you probably connected the Linksys router to your network using its WAN (Internet) port, yes? Doing so will firewall anything on its LAN ports (including its wireless network) from the main network.
So.... how to set up a Linksys wireless router to run in "AP-Only" mode (which is what you want):
Unfortunately, setting up a Linksys router to operate in AP-only mode isn't all that intuitive...
Log in to the Linksys (natch.)
Setup > basic setup.
-internet connection type: Automatic configuration DHCP
-network setup: local IP address to one on your subnet, but outside of your DHCP range (example: my Smoothwall's DHCP range is 192.168.0.100~199, my WRT54G is set to 192.168.0.254); subnet mask same as your network (default is 255.255.255.0); ignore gateway and local DNS (leave them blank.)
--DHCP type: DHCP server
--DHCP server: disable
Click Save Settings.
Setup > advanced routing.
-operating mode: router.
-Dynamic routing: interface: disable.
Congratulations! You've set up a Linksys wireless router to operate as an AP + switch only!
And, put a piece of tape over the Linksys' WAN port, so you're not tempted to use it.
A few words of warning:
- do all of the setup with a wired connection to the Linksys router. You don't want to be cursing a wireless connection that will be going thru several resets during this reconfig.
- do this with the Linksys not
connected to your network. Don't connect it to your LAN until you're done configuring it.