can not route between 2 routers

Linksys Wrt54gl wireless router
January 11, 2011 at 15:35:31
Specs: Windows XP
I have a firewall appliance fronting my home network. Construction of the house forces me to have 2 wireless access points to get wireless through the building. So I have
Cable Modem <-> Netscreen FW <-> Linksys Switch <-> WRT54G upstairs
<-> WRT54G downstairs.
I have a single CAT5e that was pulled from downstairs to upstairs. I really can't pull more without ruining the house.
The internal IP for the netscreen is netmask is The FW side of each router is (upstairs) and (downstairs) The LAN side of upstairs is and serves DHCP to .131 - .151. The LAN side of downstairs is and serves up DHCP to .200-.220. Both of the WRT's are in router mode with RIP. They both sort of work. That is if I get an address from the upstairs router I can successfully hit the internet. Same with the downstairs router. But.... I can't access between the LAN of one router to the LAN of the other. Any ideas?

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January 11, 2011 at 15:49:04
You can't use 192.168.78.x on both sides of the routers or no routing can take place.

These must be in bridged mode.

Your ip addressing is perfect if just using the routers as wireless switches. But this means they are connected to the firewall/switch via a lan port in each not wan port.

The usual setup in this situation is to do the following
connect the routers via their lan port not wan port
diable dhcp on both routers and have only the FW providing dhcp which will flow thru the wireless routers [now wireless switches]

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January 11, 2011 at 19:35:15
hmmm, I can understand that with a straight /24 sub-net there would be no routing. I thought with the way I set up the sub-nets you would have to have a route to between the segments. the one line drawing didn't translate to the posting. Both wrt54g's plug into the switch. the wan port on each and the trusted side of the firewall share the lower part of 192.168.78, and the LAN side of each router is a 1/8 chunk of the upper half of the address block. Oh well, thanks though

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