My ISP provides static IP range x.y.z.112 to 127. At the moment, my existing router is configured with
ROUTER A (existing settings)
- WAN IP: x.y.z.114
- Mask: x.y.z.240
- Gateway: x.y.z.113
I want to split the IP range such that x.y.z.120 to 127 goes through another router. To do this, my understanding is to change the above mask to 255.255.255.248 and use on the new router the settings:
ROUTER A
- WAN IP: x.y.z.114
- Mask: x.y.z.248
- Gateway: x.y.z.113
ROUTER B
- WAN IP: x.y.z.120
- Mask: x.y.z.248
- Gateway: x.y.z.113
and then add a switch upstream of the 2 routers.
However, just by changing the subnet mask of the existing router alone, the internet connection is lost. What am I not understanding or doing correctly?
Desired Network Diagram
ISP
- WAN Gateway: x.y.z.113 (provided by ISP)
- Switch
- Router A: WAN: x.y.z.112-119
- Router B: WAN: x.y.z.120-127
- Switch