Patrick9876
Regular Contributor
I'm running Merlin 386.1.2 on an RT-AC86U. The router's default config had it using subnet 192.168.50.0/24. I changed that to 192.168.1.0/24 just because that is what I was used to. Now I have a device (a USB modem that I'd like to try as a backup WAN connection) that has an admin HTTP server hardcoded to 192.168.1.1 - the current address of my router. I don't know if this will cause any problem other than not accessing the modem's admin function, but I can't imagine having the same IP address on a LAN - even on separate LAN segments - is a good idea. So I'm considering changing router's subnet back to 192.168.50.0/24. But I have some concerns.
- The subnet is references on at least 2 different pages in the Merlin admin GUI, each with it's own Apply function :
LAN - LAN IP specifies the router's IP addr and subnet mask.
LAN - DHCP Server specifies the starting and ending address of the DHCP pool. (I assume this pool has to be in the router's subnet, but I guess I don't know that for sure.)
What happens between the 2 Applys?
- All devices on my LAN get their addrs via DHCP, but their leases will almost certainly not have expired when I change the router. Will I have to take some action on each device (such as rebooting) to get it to ask for a new address? (No problem for 4 computers. More problematic for 3 NAS devices. Very difficult for an IOT thermostat.)