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Need some routing help

sammyz

sammyz

LG Whiz Kid
I have 3 routers.

Primary router is Comcast's cable modem/wireless router/all-in-one. It is set up with DHCP.

Second router (D-Link DIR-615E3 running DD-WRT) is a repeater with a WAN port. It has only one port in the back when in this mode for internet use.

Third router is where I'm having a problem. It is a LinkSys WRT110 (no DD-WRT support). I want to use this third router as a physical LAN cable router by connecting it to the WAN port in the back of the repeater (second router). But the problem is that this third router doesn't like the other IP addresses (I'm guessing). Each time I connect it, it doesn't want to connect to the internet at all. It sometimes will for 10 seconds with LAN only but not WLAN. It is very confusing for me. I disabled DHCP because I assume the main router will assign DHCP, but again I'm guessing.

Here are the IPs of each router:
Primary: 192.168.1.254 -DHCP Enabled
Second (Repeater): 192.168.1.1
Third: I have changed it from 192.168.1.1 to 192.168.254.1 but it seems when I do that, I have to factory reset it to get it to connect via WLAN...LAN it works fine. But internet still isn't happening. I've tried other IP's as well, still no go. Don't know if it's second or third router's fault.

I only need the third router to connect multiple devices via LAN (two Vonage devices and a PC). I know you can connect vonage device to vonage device and then PC to last vonage device, but I would still like the router there for future use.

I do have the Wifi SSID as a different network for third router by the way since it can't be used as a repeater.
 
I'm not great at networking, but as a basic diagnostic question- Is it safe to assume that if you connect a regular computer into the repeater (second router) then that regular computer will get an internet connection?
 
Sepero said:
I'm not great at networking, but as a basic diagnostic question- Is it safe to assume that if you connect a regular computer into the repeater (second router) then that regular computer will get an internet connection?
Click to expand...

Yes it does. That's what is so mind boggling...should have mentioned that too...
 
You want the router in bridge mode. It's been a while since I worked with a linksys router; if there is no setting for bridge mode, try plugging the Ethernet cable not into the wan port for that router, but into one of the switch ports. You'll probably want to manually configure the IP address for the router to 192.168.1.2 with a router address of 192.168.1.1.

If you can get this to work, you should be able to get the wifi portion as well, with the same ssid, as long as it's a different channel.

I think that's what worked for me when I did this years ago and could not set bridge mode on the router....
 
I'm still trying to wrap my head around what you're doing.

You have the D-link router's WAN port* plugged into a LAN port* of the Comcast modem/router and your repeater are on the same subnet (192.168.1.0) so traffic through the repeater will be directed to the Comcast host as long as the ports are open on the Comcast.

*These are the physical RJ-45 jacks on the devices

The Linksys router is on a different subnet (192.168.254.0) so if you have the WAN port of the device plugged into a LAN port on the D-Link device, then you must specifically set it to route traffic to the other subnet. If I remember Linksys setup screens, there is a WAN tab and a LAN tab. On the WAN tab, you'd set the "internet address" to the IP address of your repeater and the gateway as the IP address of the Comcast device (or vice versa, not 100% sure on this).

Then your PC and vonage devices would then need to be on the 192.168.254.0 subnet for them to route through all three devices properly.

Is there a specific reason why you're configuring your network this way rather than just throwing a switch off the Comcast device and routing directly through there?
 
Luna no, its not set up like that.

The repeater is connected wirelessly to Comcast's all-in-one cable modem/ WiFi router.

The repeater only has a WAN port when set as a repeater. The normal LAN ports are disabled (I believe).
the port enabled as WAN is normally where you would plug internet LAN cable into if it were acting as a normal router. But when set as a repeater, this is now the port to connect to to get internet.

I want the Linksys router to act as a regular router by connecting it to the repeater's WAN port (since the repeater will not act as a router). But this is not working because maybe I haven't set up static IPs for all these routers. I added a static IP for second router. I'm going to add a static IP for the 3rd router and see if this fixes my issue.
 
The third router's wan port must be on the same 192.168.1.xxx network as the repeater in order to route traffic. The LAN side must then have a different network address (say, 192.168.2.xxx) with DHCP enabled if you want any clients connected to it to get an IP address if you really want the Linksys to be another router.

But, I'm not sure why you want to double NAT. Explain again why you want this arrangement. Is there a reason why you want the Linksys (third device) to be a router? Wouldn't you be better off with a LAN switch to have a flat network, rather than double NAT (ie, a private network inside a private network).

The ideal, of course, would be to connect it by ethernet to a LAN port on the Comcast device. If there is no way to do this by ethernet, I think you will be much better off with Powerline connections than using a WiFi repeater, which allows limited bandwidth compared with ethernet or Powerline.
 
Flip the third router to bridge mode, and use one of the SWITCH ports on the repeater, not the WAN port.

Two DHCP servers... not good stuff. Unless you throw them on different subnets which would require a different physical topography.
 
IOWA said:
Flip the third router to bridge mode, and use one of the SWITCH ports on the repeater, not the WAN port.

Two DHCP servers... not good stuff. Unless you throw them on different subnets which would require a different physical topography.
Click to expand...

Yea, DHCP is only enabled on primary router. So I'm guessing that the 4 LAN ports are now switch ports on the repeater??? It does not give me internet. If I can use the repeater as a LAN/WAN whatever router I would like to. But it's not giving me internet unless I use the single WAN port. Any ideas why?


Also third device is not DD-WRT supported, so there is nothing that says "Bridge mode".
 
sammyz said:
Yea, DHCP is only enabled on primary router. So I'm guessing that the 4 LAN ports are now switch ports on the repeater??? It does not give me internet. If I can use the repeater as a LAN/WAN whatever router I would like to. But it's not giving me internet unless I use the single WAN port. Any ideas why?


Also third device is not DD-WRT supported, so there is nothing that says "Bridge mode".
Click to expand...

But plugging directly into the repeater will give you internet?
 
sammyz said:
Also third device is not DD-WRT supported, so there is nothing that says "Bridge mode".
Click to expand...

Did you try using one of the LAN ports on the Linksys rather than the WAN port? That should make the Linksys a switch, not a router.
 
doogald said:
Did you try using one of the LAN ports on the Linksys rather than the WAN port? That should make the Linksys a switch, not a router.
Click to expand...

Umm, Linksys has only lan ports and the regular internet source port. As I said it doesn't support dd-wrt and is connecting from the repeaters wan port.
 
sammyz said:
Umm, Linksys has only lan ports and the regular internet source port. As I said it doesn't support dd-wrt and is connecting from the repeaters wan port.
Click to expand...

The only WAN port you should be using is from the main router (DHCP source) and the modem. Other than that, do not use WAN ports for anything else. Considering your DHCP router is your modem, you should not be using any WAN ports what so ever. Use the LAN port. "Internet Source" is the WAN port.
 
IOWA said:
The only WAN port you should be using is from the main router (DHCP source) and the modem. Other than that, do not use WAN ports for anything else. Considering your DHCP router is your modem, you should not be using any WAN ports what so ever. Use the LAN port. "Internet Source" is the WAN port.
Click to expand...

So how do I connect the Linksys to the repeater??? I am connecting the Linksys WAN to the repeater's whatever port that gives you internet. Is this wrong??
 
I think I'm starting to get what you're trying to do.

Your Comcast modem/wifi router is located in an area where there is no cabling to the living areas and you have some devices without wifi capabilities. So you have connected the D-link router to your comcast device as a wireless bridge and then have other devices that you wish to connect in another area, but you do have cables to connect the devices.

Your comcast LAN IP is 192.168.1.1 (That's most likely the default) You have the D-link on the same subnet, but the Linksys router on a different subnet.

Is this the way you've got it setup?

sammy1.jpg


Let me make a small suggestion in your topology.

sammy2.jpg


Connect the D-Link and the Linksys routers through the switched ports (numbered ports), not the routed port (either says "WAN" or "INTERNET"). The D-link needs to be set to bridge mode and would be best to have a static IP outside the range of the DHCP pool. It might need two IP's ... one for the wireless adapter and one for the LAN switch.

Disable routing on the Linksys device and set it to an IP on the same subnet as the other devices. You can disable wireless on the Linksys as well, unless you are going to use it as an access point, then it will most likely need an IP of it's own as make sure it's operating on a channel different from the D-Link/Comcast connection to prevent RF interference.
 
Already is on Client Bridged mode with bridge enabled and I once connected laptop to numbered port=no internet.

Connected laptop to WAN port= internet.

If I can get all the switch ports to work from DIR-615, then I'd rather do that. But yea your first pic is how I was trying to get it working. I had all the subnets on the same 255.255.255.0

Why does the switch port not give me internet?

Edit: I will not be at this house I was trying to set it up at for another 6-7 weeks. So we can discuss this, but I have no access to any of my routers from remote locations.
 
First things first. I'd check to make sure the switched ports are enabled. Once you are sure the D-link is connecting to the comcast device via wifi, plug in a pc/laptop to a switched port and try and ping the ip address of the comcast modem.
 
sammyz said:
Umm, Linksys has only lan ports and the regular internet source port. As I said it doesn't support dd-wrt and is connecting from the repeaters wan port.
Click to expand...

The internet source port is the WAN port.

If connecting an ethernet device to the WAN port of the Dlink gives it internet, then if you connect one of the Linksys LAN ports to the DLink WAN port, the Linksys becomes just an ethernet switch and anything else connected to the other Linksys LAN ports will share connectivity. The Linksys firmware, whether stock or DD-WRT or Tomato (if it was available) would do nothing. I'd turn off WiFi on the Linksys ahead of time to avoid confusion, though.
 
Found this in the D-Link manual. Check if you've got everything set properly.

Secton  - Installaton
If you are connecting the D-Link router to another router to use as a wireless access point and/or switch, you will have to do the following before connecting the router to your network:
Click to expand...
 
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