on 22-03-2020 12:59 PM
I'm trying to change the addressing scheme on my LAN. For this to work I need to be able to change the IP address of the router from the default of 192.168.1.1
I have gone into the router menu's (Sagem with firmware: SG4K10002808t) and changed the address of the router to 10.0.0.1 with a subnet mask of 255.255.255.0 and DHCP disabled as I have my own DHCP server.
However on the device info page the 'Local subnet mask' field is blank and I can't get out to the internet.
Anything I should be doing differently or any extra steps I need to take?
on 22-03-2020 03:00 PM
I'd ignore what the router says about the subnet mask, check on the actual devices, have they been allocated:-
Valid IP address
Correct subnet mask
Correct Default Gateway
Correct DNS Server address
22-03-2020 02:19 PM - edited 22-03-2020 02:20 PM
Just to clarify my settings i've taken some screenshots - https://imgur.com/a/FcIcqvF
As you can see on the network information the subnet mask is blank.
If i restore the default IP address of the router it shows the subnet mask of 255.255.255.0
If I enable DHCP then the subnet mask is also shown.
As soon as I change the IP and disable DHCP. No subnet mask is listed.
Not sure if this is expected behaviour or indeed the cause of my issues. But seems likely?
(The screenshots also show a different IP to the one I mentioned in my original comment of 10.0.0.1 - i've been trying a few different addresses.)
on 22-03-2020 01:55 PM
Of course I remember now, you are using your own DHCP server. Have you configured the router's new IP address in there?
on 22-03-2020 01:52 PM
on 22-03-2020 01:37 PM
This is the best method to do this:-
Remove any DHCP Reserved IP addresses
Change the DNS address handed out by DHCP
Change the router’s IP address & DHCP IPv4 Pool Start & End ranges to match.
Then disconnect & reconnect each device to force it to get a new IP address on network 10.