1. Open Network connection
Open Run, type ncpa.cpl and click ok
2. Right Click on Active Network connection -> Properties
3. In Network Tab -> Select Internet Protocol Version 4(TCP/IPv4) -> Click Properties
4. Under Internet Protocol Version 4(TCP/IPv4) Properties in General Tab -> Click Advanced
5. In Advanced TCP/IPv4 settings Under IP setting Tab we can Add Multiple IP Addresses with Subnet Maks. Click Add in IP Addresses.
6. Similarly we can add Gateways by clicking Add in Default Gateways