Bridge mode issues

Jul 20, 2018
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Hello everyone, forgive me if there is an existing thread on this but I couldn't find anything that quite answered my question... I'm attempting to run bridge mode on my Motorola modem/router to disable it's routing capabilities.

There are no issues with connectivity with the Motorola , it just cannot be flashed with DD-WRT or other VPN client firmware. I plan to set this modem/router to bridge mode, and run a Cisco (E2500) router in its place.

I can configure the Motorola to bridge mode, but after that the IPv4 changes and I lose access to the router. The only way to get back in that I can figure out is doing a factory reset and signing in with the "admin/password" credentials. I tried reaching the IP shown in the IP configuration within the CMD Prompt, but had no success.

I've tried doing this with my VPN enabled, as well as disabled. I've tried troubleshooting for most of the day, but am very inexperienced with networking. I figure there are some settings I can reconfigure to fix the issue... Or I may be missing some crucial knowledge. Any help would be much appreciated!
 
Solution
It shouldn't change the ip of the modem. There could be a conflicting ip in your network. 192.168.1.1 is one of the most popular gateways. Make sure to move the bridge off of that. Because it's upstream from your NAT you don't really want it in your subnet because your dhcp server may dish out a conflicting ip. If nothing works try nesting the routers.

Verify that your router is getting a public ip. Normally the modem/router is called passthrough to make it a modem only.
It shouldn't change the ip of the modem. There could be a conflicting ip in your network. 192.168.1.1 is one of the most popular gateways. Make sure to move the bridge off of that. Because it's upstream from your NAT you don't really want it in your subnet because your dhcp server may dish out a conflicting ip. If nothing works try nesting the routers.

Verify that your router is getting a public ip. Normally the modem/router is called passthrough to make it a modem only.
 
Solution