gisuck Posted July 16, 2019 Share Posted July 16, 2019 Hi there, Just recently purchased the XR500 and want to do something goofy. I got the XR500 setup as 10.0.0.2/24, and want to access 10.0.0.1 on my WAN port. Even though my cable modem is in bridge mode, I can still access the admin interface to access information such as my cable modem status and signal strength. I know technically having my LAN the same subnet as my cable modem on the WAN this wont work, but my Linksys WRT1900AC was so broken that this actually worked, because Cisco.... Just wondering what would be the best way to do this. I thought about about doing a static route to 10.0.0.1/32 to 0.0.0.0, but that didn't seem to work. Invalid destination IP address. Link to comment Share on other sites More sharing options...
Sunaikinti Posted July 16, 2019 Share Posted July 16, 2019 Welcome to the forums! Try 192.168.100.1 in your browser. No static route needed. Link to comment Share on other sites More sharing options...
gisuck Posted July 16, 2019 Author Share Posted July 16, 2019 That IP address wouldn't work for me. The cable modem is configured as 10.0.0.1 (which is on the WAN port of the XR500), and I configured the XR500 to be 10.0.0.2/24. Link to comment Share on other sites More sharing options...
Sunaikinti Posted July 16, 2019 Share Posted July 16, 2019 I read somewhere when the hub is in bridge mode, you can access it at that address. You might have to specify the port after 192.168.100.1:8080. If that don't work, can you ping it at 10.0.0.1? If so you can try and use putty to access it. Or this is from xfinity: Else you can try typing ipconfig and press enter in command prompt window. A list will appear with lot of IP addresses. Look for the IP address named as Default Gateway under Ethernet Adapter. That IP address is your default router IP. Link to comment Share on other sites More sharing options...
Administrators Netduma Fraser Posted July 16, 2019 Administrators Share Posted July 16, 2019 Hey, welcome to the forum! Usually when putting a router in bridge mode it gives you the IP address that you can use to access the interface, otherwise I would suggest looking up the router model and see if you can find that information. Link to comment Share on other sites More sharing options...
gisuck Posted July 16, 2019 Author Share Posted July 16, 2019 To clarify, the XR500 is in router mode, and the cable modem is in bridge mode. So standard configuration for anytime you want to use your XR500. The XR500 has a public IP address. It's that even though the cable modem is in bridge mode, the private IP address is still accessible so you can make configuration changes or diagnose your cable connection. So, when I use the IP address of 10.0.0.1, XR500 doesn't route the traffic to the WAN port to access the cable modem. Link to comment Share on other sites More sharing options...
Administrators Netduma Fraser Posted July 16, 2019 Administrators Share Posted July 16, 2019 Ah I think I get what you mean now, in which case I can't think of a possible way to do this as once in bridge mode it passes all traffic to the router. Just to clarify you want to have access to the modem interface and router interface from WAN? Link to comment Share on other sites More sharing options...
gisuck Posted July 17, 2019 Author Share Posted July 17, 2019 [Cable Modem in bridge mode LAN (10.0.0.1)] ----> [XR500 WAN (99.248.x.x)] ~~> [XR500 LAN (10.0.0.2/24)] ---> [My Computer (10.0.0.100)] {---> denotes ethernet connection, ~~> XR500 internal switching} Even though the cable modem is in bridge mode and is giving the XR500 a public IP address, the LAN port on the cable modem is also accessible via the 1 static private IP address. I guess technically what I'm doing is not valid since me configuring the XR500 LAN as 10.0.0.2/24 denotes that all 10.0.0.x would stay inside the switchport, and not route. The WRT1900AC routed the traffic anyways. Just wondering if there's a way to hack this, or guess changing the subnet on my LAN is the only way to fix this. IE 10.0.1.1/24? Link to comment Share on other sites More sharing options...
gisuck Posted July 17, 2019 Author Share Posted July 17, 2019 With this configuration, this is why I thought setting up a static route that says 10.0.0.1/32 0.0.0.0 would work. It would be the absolute host IP (instead of a subnetted network) to go through the default gateway. Unfortunately, static route complains when I do this. Link to comment Share on other sites More sharing options...
Sunaikinti Posted July 17, 2019 Share Posted July 17, 2019 I would just change the subnet. Link to comment Share on other sites More sharing options...
Administrators Netduma Alex Posted July 17, 2019 Administrators Share Posted July 17, 2019 Oh wow i'm gonna have to draw a diagram to get my head around this one. Link to comment Share on other sites More sharing options...
gisuck Posted July 17, 2019 Author Share Posted July 17, 2019 15 hours ago, Sunaikinti said: I would just change the subnet. Yeah, I'll probably need to try this on the weekend when I have time to mess around with my home network again. Quite a number of devices everywhere. Link to comment Share on other sites More sharing options...
gisuck Posted July 17, 2019 Author Share Posted July 17, 2019 8 hours ago, Netduma Alex said: Oh wow i'm gonna have to draw a diagram to get my head around this one. Here, let me confuse you more... Link to comment Share on other sites More sharing options...
Administrators Netduma Fraser Posted July 17, 2019 Administrators Share Posted July 17, 2019 Let us know how you get on at the weekend. What is your usecase for this? Link to comment Share on other sites More sharing options...
gisuck Posted July 17, 2019 Author Share Posted July 17, 2019 2 hours ago, Netduma Fraser said: Let us know how you get on at the weekend. What is your usecase for this? Minimal. It would allow me to login to the cable modem to see signal strength and stuff in the event that my internet connection is showing packet loss, slow speeds, outages, etc. The only other reason would be if I wanted to convert the cable modem from bridge mode back to routing. Link to comment Share on other sites More sharing options...
gisuck Posted July 20, 2019 Author Share Posted July 20, 2019 Changing LAN subnet worked. Just proves that Cisco router was so broken to route traffic to WAN port when LAN failed. Link to comment Share on other sites More sharing options...
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