I am looking for layer 3 to connect different two kind of network through Point-point connectivity.
So need product advice on Layer 3 switch / 8-12 ports for gig network .
Thanks in advance.
You can look for your ideal Catalyst Switch here:
Almost all of them are are Layer 3 Switches with Routing capabilities (you may need additional license for Advance Routing features like BGP, etc) and are GigabitEthernet.
Cisco Catalyst 2960-X and XR Series
Cisco Catalyst 3650 Series
Cisco Catalyst 3850 Series
Cisco Catalyst 9200 Series
Cisco Catalyst 9300 Series
Cisco Catalyst 9400 Series
You can choose one that adjust to your requirements and budget looking into their data sheet.
I hope this helps.
Cisco 9300 is an option or 3650 if you want something cheaper.