Linksys Router for LAN?

[CBuxton]

I've got a fiber connecting two locations and would like an inexpensive way to route between the two networks. One is a 172.16.32.x and the other is a 172.16.0.x. I was thinking that I would assign the ips to the "wan" port, and also to the "lan" side. Would this work? Thanks.

 

[CBuxton]

Bump!

 

[CTR]

If the LAN port and the WAN port are both routed ethernet ports, then you are good to go. One port becomes the next hop address for all hosts on the 172.16.32.0 subnet sending traffic to the 172.16.0.0 subnet (I'm assuming you subnetted this B into multiple C's), and the other port becomes the next hop address for all hosts on the 172.16.0.0 subnet sending traffic to the 172.16.32.0 subnet. So for instance, the WAN port gets the IP address 172.16.0.1/24, and the LAN port gets 172.16.32.1/24. If this Linksys is really a dual-ethernet router, and automagically injects connected routes into its routing table like it should, then everything will work.

Is there an Internet link somewhere in this configuration? If so you need to make sure the default route or gateway of last resort on the linksys points to the IP of your router connected to the Internet. Also if said Internet router is configured as the default gateway for the hosts on one of your subnets, you need to either change the hosts to use the Linksys as the default gateway, or else put a static route on the Internet router for the remote subnet. Choice is yours.

 

[CTR]

Or run RIP on everything and get on with your life.

 

[CBuxton]

Thanks for the detailed reply. I just need to figure out if that DSL/Cable router's WAN port is a routed ethernet port. My initial reaction would be that it is because the WAN and the LAN port both let you set ip, gateway, etc. The WAN port actually is just where the cable or DSL modem would plug in. Thanks again for the help.