http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23266817 en Fri, 10 Feb 2012 23:34:31 EDT Fri, 10 Feb 2012 23:34:31 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23286345 http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23286345 Tue, 03 Nov 2009 18:23:48 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23282928
on router B
- Set static IP on your PC for the router B's IP range
- Connect to the admin page of router B
- Disable DHCP on router B
- Allow LAN to LAN communication over wireless in Router B
- Change private IP of the router B to some other network range (Please be aware that your admin page will freeze as soon as you do this as your PC would be on old IP range and Router B on new IP range
- Connect router B's LAN wired port to the router A's LAN wired port

ON router A
- Connect router A's WAN port to ISP modem and configure it

Now your router B will simply act as a wireless access point and you can infact connect more PCs to the LAN port of the router B in addiotion to the LAN port of router A.

Finally reboot all computers (both wired and wireless) or renew their IP addresses. The IP addresses to all computers will now be served up by router A only. You would also eliminate double NAT with this setup as double NAT leads to MTU issues.

Hope this helps. ;)]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23282928 Tue, 03 Nov 2009 06:05:58 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23275908 said by jabba1900 :

Yes, that does make it clearer. Thanks again.

Now, with the change of the source address, does that mean Internet traffic to and from Router B will be slower than Internet traffic to and from Router A?

If so, how much of a difference are we talking about? Does it actually slow down traffic or does it just delay start of traffic? I suppose nothing can be done about this?
You're welcome.

As for the changing of source address, I suppose it takes a little longer but I really doubt it would be noticeable to the human eye unless there's some big problems with the NAT engine. :)]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23275908 Sun, 01 Nov 2009 20:03:57 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23275338
Now, with the change of the source address, does that mean Internet traffic to and from Router B will be slower than Internet traffic to and from Router A?

If so, how much of a difference are we talking about? Does it actually slow down traffic or does it just delay start of traffic? I suppose nothing can be done about this?]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23275338 Sun, 01 Nov 2009 17:15:37 EDT http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23275218 said by jabba1900 :

That's exactly the answer I needed. Makes things a lot clearer. Even makes me understand better what exactly I did! Thank you very much!

As long as I'm not losing too much performance I'm happy with my current setup. When I have time I'll run some speed tests.
One thing I forgot to mention in my last reply was clarifying what I meant by "Router A only has access to things within it's own subnet, so traffic trying to get to your Router B LAN from the Router A LAN won't work without port forwarding or running in Router mode (no NAT)." Basically the NAT on the second router changes the source address of your data going out the WAN interface so that it becomes the WAN IP of Router B. Then it gets changed again when it hits the Router A WAN port if you're sending to the Internet. The same thing happens for returning data from the Internet just in reverse. Hope this helps. :)]]> http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23275218 Sun, 01 Nov 2009 16:26:02 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23274869
As long as I'm not losing too much performance I'm happy with my current setup. When I have time I'll run some speed tests.]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23274869 Sun, 01 Nov 2009 14:36:46 EDT http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23274142 said by jabba1900 :

However, are there ways to make Router A's network invisible to Router B, thus enabling me to use Router A for rest of house as phantom suggested?
No. The problem comes from the fact that you're accessing the Internet through the first router (Router A). If Router A wasn't visible to Router B then you might as well not even have the WAN port of Router B connected to anything unless it was another modem for a separate Internet connection. If you wanted, you could buy a switch, get 2 IP addresses (might cost money) from your ISP and connect the two routers' WAN ports to a port on the switch. This would allow your two routers to share the modems and have their private side LAN's invisible to each other completely. The way you have it setup now only covers half the battle (can't reach machines on the Router B LAN from Router A without port forwarding and even then...). Simply put for someone just going into networking like yourself, a router has access to anything that is directly connected to it unless otherwise specified. In your case Router B has direct access to Router A's LAN and whatever Router A connects to (in your case the Internet). Router A only has access to things within it's own subnet, so traffic trying to get to your Router B LAN from the Router A LAN won't work without port forwarding or running in Router mode (no NAT). Then you get into static routing which based on your experience, might not be something you want to mess with yet.]]> http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23274142 Sun, 01 Nov 2009 10:37:30 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23272904
As fox7 suggested, I changed Router B to Gateway. I also changed the static IP setup, which I need to do port forwarding. Not even sure exactly what I did (as I said, I'm a networking novice!), but I think it had to do with making sure the static DHCP actually fell within the DHCP range of the router (I suppose that would make sense).

Anyway, it all works now! Thank you again!

I was wondering about phantom's suggestion to have Router A connect to rest of house and Router B connect to basement. From what I've read, the innermost network is always the most secure one, and apparently Router B would have access to whatever network gets set up on Router A. Haven't been able to test this. However, are there ways to make Router A's network invisible to Router B, thus enabling me to use Router A for rest of house as phantom suggested?

I hope what I said makes sense!]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23272904 Sat, 31 Oct 2009 23:14:19 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23269128 -Router A's Static DHCP is set to the MAC address of the WAN and static IP (192.168.1.31) of Router B

Remove this for starters.
You should be getting internet access on all PCs. Router A gives out addresses to its PCs, .2.x and Router B gives out addresses to its PCs, .1.x
--
Ain't nuthin but the blues! "Albert Collins".
Leave your troubles at the door! "Pepe Peregil" De Sevilla. Just Don't Wifi without WPA, "Yul Brenner"

LlamaWorks Equipment]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23269128 Fri, 30 Oct 2009 23:35:37 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23268325
ex router 1 using 192.168.1.1 through 192.168.1.100, setting router 2 to use 192.168.2.1 through 192.168.2.100.

In a setup like this I would put the router that connects to the rest of the house as router 1 then router 2 would be the apt. So that you would get the full bandwidth and you could limit the bandwidth that the renter would get. ]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23268325 Fri, 30 Oct 2009 19:48:01 EDT http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23268264
fox7]]> http://www.dslreports.com/forum/Re-Two-routers-two-networks-one-isp-Problems-23268264 Fri, 30 Oct 2009 19:31:17 EDT http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23267898 said by jabba1900 :

Router A works fine giving me an Internet signal just like a single router setup should. I can connect to Router B, but I receive no Internet signal.

I have been able to ping both routers to and from each other.
My guest would be that Router A is not doing Network Address Translation for your Router B LAN addresses. If you're able to route between LAN areas back and fourth without a problem but Internet traffic ain't making it out to the Internet from your computers on the second LAN, it's a NAT issue. I had this issue with my WRT54G once. The new WRT54G2 does NAT for multiple subnets by itself. Any private addresses on this new router will run through NAT before going to the Internet.

As for the VLAN setup, you could do it if you wanted but I can't offer any major advice on setting that up.]]> http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23267898 Fri, 30 Oct 2009 18:29:17 EDT http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23266817
After having done tons of Internet research I think I have this set up properly in principle. I have followed the advice in this link:

»www.ezlan.net/shield.html

I tried everything in the link, but my second router still can't connect to the Internet through the first router.

The two routers are Linksys WRT54GL running latest (1.25) Tomato firmware.

This is my setup:

-Modem plugs into WAN port of Router A.

-Router A's IP address is 192.168.2.1 and subnet mask is 255.255.255,0

-Router B's WAN port is connected to LAN port of Router A

-Router B's IP address is 192.168.1.1 and subnet mask is 255.255.255.0

-Router B is set up to receive WAN through static IP, which is set to 192.168.2.31 (outside of DHCP range of Router A)

-WAN gateway on Router B is set to IP address of Router A (192.168.2.1) and WAN DNS on Router B is set to the same as WAN DNS on Router A

-Router A's Static DHCP is set to the MAC address of the WAN and static IP (192.168.1.31) of Router B

-Router A's mode is set to 'Gateway'

-Router B's mode is set to 'Router'

Router A works fine giving me an Internet signal just like a single router setup should. I can connect to Router B, but I receive no Internet signal.

I have been able to ping both routers to and from each other.

I have no idea what is going wrong here. Everything I've done so far is based on Internet research. I'm otherwise quite the novice when it comes to networking issues.

Do I have my IP addresses and DNS set up right?

Am I doing something wrong with the static IP setup on Router B?

Is there some DHCP/DNS setting that needs to be changed?

Do I have to do something with the firewall settings?

I will soon be getting a Netgear 208T managed switch which I will use behind Router B to provide network connections to all the rooms in the rest of the house. Should I use VLANs instead to accomplish what I want to do? I have no idea how to set up VLANs though...!

Any help would be greatly appreciated!]]> http://www.dslreports.com/forum/Two-routers-two-networks-one-isp-Problems-23266817 Fri, 30 Oct 2009 14:42:53 EDT