Hi. I have a local network with ips in the range 192.168.7.x which is working fine.
I want to add IPs with range 10.1.1.x to the network.
What should my subnet mask be set to please?
Thanks
If you want them to talk to each other without routing, then that won't work.
If you want both subnets as separate subnets, then /24 or 255.255.255.0 for both will be OK.
If you want the networks to talk to each other without routing... your best option would be to expand the current subnet.
Your current /24 255.255.255.0 has 254 usable IPs.
/23 255.255.254.0 would give you 510
/22 255.255.252.0 would give you 1022
Unless there's a limitation to the broadcast in a more open range that I'm forgetting about... changing your current subnet to:
192.168.7.0/23 would allow you to use 192.168.7.1-192.168.8.254
192.168.7.0/22 would allow you to use 192.168.7.1-192.168.10.254
Otherwise just activate inter-lan routing on your router, or setup the routes manually.