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Multiple Router Set Up Computers Cannot Access Each Other

Ok, I've got 2 linksys routers setup, one has no wireless and is directly connected to the modem, the other has wireless and is connected to the other router.

router1
| | |
| 1 2
router2
|
wireless
| | |
3 4 5

Now computers 1 & 2 can access each other (they are on same router hardwired in).  And computers 3,4,5 can accech other (all on the wireless connecting to the wireless router).

But they 1&2 can't connected to 3,4,5 and vice versa.  Does anyone know a way to solve this?
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krusho
Asked:
krusho
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4 Solutions
 
nprignanoCommented:
1) set the wireless router to act as an Access Point and not a gateway
2) I assume router 1 is the modem - so are the 2 computers connected to the modem?  if so, plug trhem into the ethernet router
3) setup the ethernet router for DHCP

nprignano
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krushoAuthor Commented:
Both hardwired computers are connected to the non-wireless router that is connected to the modem.

And the other machines are on wireless through the router that connects to the other router that connects to the modem.

hardwired computers -> router A -> modem
wireless computers -> router B -> router A -> modem
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nprignanoCommented:
oh, ok.

how is the wireless router configured, as a gateway or as an access point - also, where is dhcp coming from on the network?


nprignano
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Don JohnstonInstructorCommented:
Are you sure the default gateways are correctly defined on all the PC's?

Are you doing NAT on Router 2?  If you're not, then on router 1 you'll need to create a route to the network the 3, 4 and 5 are on.

-Don
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skaap2kCommented:
If router2 is configured as a router, do you need it to be a router? or would it be ok to set it up as a access point, that way it will bridge between the 2,

If it needs to be a router, then from router1, you will need a static route set back to the network on router2
You should also switch off any NAT on router2 for this to work nicely! :)

-Rob
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krushoAuthor Commented:
I'm not sure on the newer wireless linksys how to setup the gateway/access point.  The older one has it setup as a gateway.

Both routers have dhcp going (because i wasn't sure what ip the 2nd router would get if the first wasn't assigning it one (for purposes of port forwarding).

Yes, the default gateway is defined right on all of them (wireless ones are 192.168.2.1 & non-wireless are 192.168.1.1) because they all have internet.

I currently am not doing NAT on other machine, how would i set it up, and which NAT would i need (rip1, etc.).

As I told a previous person, I am unsure how to set up router 2 as a access point or if it is already that way.  

Ok on router1 what is the items I need for the static route, and also keep in mind I do not know if this matters but router2 is connected through the 'uplink' slot in the back of router1 not one of the main network hook ups.
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Don JohnstonInstructorCommented:
I don't know which router you have, but it should be pretty straightforward. On the Linksys routers, click on the "Advanced Routing" tab and specify the following:

Destination LAN IP: 192.168.2.0
Subnet Mask: 255.255.255.0
Default Gateway: <ip address of WAN port on router 2>
Interface: LAN & Wireless

That should do it.

-Don
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krushoAuthor Commented:
Here I took screenshots of the Advanced Routing screens on both routers, maybe this should help you guys.

This one has no wireless and is connected directly to the modem.
Router IP: 192.168.1.1
DHCP: ON
http://uploads.lostminions.org/Krush/router1.jpg

This one has wirless and is connected to router1.
Router IP: 192.168.2.1
DHCP: ON
Gets 192.168.1.100 from router1
http://uploads.lostminions.org/Krush/router2.jpg
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Don JohnstonInstructorCommented:
A couple questions.

With these routes, PC's 3, 4 and 5 can ping each other but not 1 and 2?
Can PC's 3, 4 or 5 ping 192.168.1.100?
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Don JohnstonInstructorCommented:
Also, as a test, create a route on either PC 1 or 2 pointing to the 2.0 network.

route add 192.168.2.0 mask 255.255.255.0 192.168.1.100

Then see if you can ping one of the PC's on the 2.0 network.
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krushoAuthor Commented:
1 & 2 can ping each other

3, 4, & 5 can ping each other

3, 4, & 5 can not ping 192.168.1.100

I should also note that the pc's are all using static IPs
1- 192.168.1.97
2- 192.168.1.150

3- 192.168.1.99
4- 192.168.1.98
5- 192.168.1.149

There's also others on the wireless that are not using static IPs.
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Don JohnstonInstructorCommented:
There's your problem. You've got two networks (seperated by router 2) with the same network number.

PC's 3, 4 & 5 MUST have IP addresses that do not start with 192.168.1...

Change the IP addresses of those PC's to 192.168.2...

What addresses do the other PC's have that do not have static IP's?

-Don
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krushoAuthor Commented:
Well, there are no pc's plugged into router1 that aren't static ips.

and the router2 wireless pcs that aren't static would be receiving 192.168.2.100-150

I deleted the routing things, and changing the static ips didn't work.  Could you tell me which of the routers to put what information in for the routing?  Refer to the screenshot links to know which router is which and what I am looking at to enter things.
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Don JohnstonInstructorCommented:
The route you had entered previously was correct.

There was no problem with the IP addresses of PC's 1 & 2 (connected to router 1).

The problem was with the IP addresses of PC's 3, 4 & 5.

In summary:

Set the IP addresses of PC 3, 4 & 5 to the 192.168.2.0 network with a default gateway of 192.168.2.1
Put the route back in on router 1.

Outside

Router 1
192.168.1.1
  |     |      |
  |     |      |
  |     PC1  PC2
  |
  |
192.168.1.100
Router 2
192.168.2.1
  |     |      |
  |     |      |
PC3  PC4  PC5

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krushoAuthor Commented:
I put it back in and tried changing the machines to 192.168.2.... but there are still not accessible to the pcs on the other router and vice versa.
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Don JohnstonInstructorCommented:
Verify that the PC's (3, 4 & 5) can ping the 192.168.2.1 address. Can they now ping 192.168.1.100?

If this doesn't work then the only thing I can think of is a problem with router 2.

-Don
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krushoAuthor Commented:
No they can't ping 192.168.1.100

If you have anymore ideas I'll check again later but for now I'm going to take a break and go to sleep.
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PennGwynCommented:
Router 2 needs to not do NAT; wireless and 3/4/5 need to be on a new subnet.  It needs to know that its access to the Internet ("default gateway") is via Router 1.

Router 1 needs a route telling it that the new subnet lies behind Router 2.

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krushoAuthor Commented:
I can't get any of the solutions posted to work.  Could the points be refunded please?
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skaap2kCommented:
Ok - if you want to try something else :

- Does your wireless router have a number of LAN ports on it?  (Often these wireless routers have a 4 port switch on them - or does it just have 1 LAN port)

-Paul
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krushoAuthor Commented:
It has 4 ports, just like the other one.  They are both Linksys, the wireless one being the newer.

I think I might just end up putting a normal network card back in the tower that is connecting on wireless, and hardwire my laptop as well, they just have all my machines on router 1 and let everyone else use router 2.
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skaap2kCommented:
Ok try this before you d/c everything.

1. Disconnect the WAN port of Router 2 from the LAN port of Router 1

2. Connect a LAN port from Router 2 to a LAN port of Router 1

3. Configure all the computers to be on the same subnet (say 192.168.1.0/24) and using Router 1 as their default gateway

4. Test to see if all the Computers can ping each other


Diagram:


           MODEM
                |
           Router 1 192.168.1.1
           |      |     |     |
          pc1 pc2 pc3    |
                               |
                               |
         pc4  pc5          |
           |     |     |      |
           Router 2 192.168.1.100
                  |
                  |                
          Disconnected


IP Addressing:

                       IP address               Subnet Mask                 Default Gateway

Router1 (LAN) 192.168.1.1             255.255.255.0
Router2 (LAN) 192.168.1.100          255.255.255.0
PC1=              192.168.1.10           255.255.255.0                192.168.1.1
PC2=              192.168.1.11           255.255.255.0                192.168.1.1
PC3=              192.168.1.12           255.255.255.0                192.168.1.1
PC4=              192.168.1.13           255.255.255.0                192.168.1.1
PC5=              192.168.1.14           255.255.255.0                192.168.1.1



Does this make sense ? you are basically trying to connect the switches back to back LAN - LAN to create one bigger LAN using the 2x4Port Switches.

-Paul


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skaap2kCommented:
Sorry - i forgot to mention - if you might need a cross over cable to connect the 2 LAN ports together. I am not sure if Linksys automatically detects MDI/MDX. If you dont get a link light when you connect the two LAN ports together using a standard patch cord, then you will need to try using a cross over path cord.

-Paul
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krushoAuthor Commented:
I don't have a LAN port on the newer Wireless router, hte old one is the only with the Uplink port.
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skaap2kCommented:
Can you connect Router 2  -  4 port switch to ... Router 1 - Uplink port?

Can you give me the model number of each router?

-Paul
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krushoAuthor Commented:
router1- BEFSR41

router2- BEFW11S4
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skaap2kCommented:
Krusho,

I had a look at those two products at Linksys.com you should be able to do as i mentioned ... put a cat5e patch lead from one 4 port switch (router 1) into the other 4 port switch (router 2). This will make the single LAN encompass both switches and your wireless network.

-Paul
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krushoAuthor Commented:
Not the uplink? but the question is how do the items on router 1 know what's on router 2

and how do i get router 2 a static ip, becaus router 1 is given it an ip
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skaap2kCommented:
ok - well the answer to that question is that static routes put into the routing table of each router tells router 1 what is on router 2 in your original setup - as per Donjohnstons post  - Date: 05/04/2006 10:44PM IST.

If that is not working for you and you need connectivity between all the pc's and need them all to go onto the internet then try what i suggested above - whereby you have 1 network and 1 gateway and you disregard the routing aspects of Router 2.
If you specifically require that the pc's be on two seperate subnets - then the only way to achieve this is as per afore mentioned Donjohnstons post.

-Paul
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krushoAuthor Commented:
I'm still not getting this to work.  But because you all gave the effort to help me I'll split up the points among you.
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skaap2kCommented:
Thank you krusho - i am sorry we couldnt sort that out for you.
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krushoAuthor Commented:
It's ok, I'm going to just hardware my 3 machines to the non-wireless, I just have to get a networkcard for one of them with a cord plug.
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