What and why we need it?
- VRF : Virtual Routing & Forwarding Instances.
- Keep your routing table separately from others, prevent overalpping by creating VRF instances.
VRF-Lite Initial Configuration
Create VRF Globally & Apply Descriptive Name
Router(config)# ip vrf Company-A -> ‘Company-A’ is case sensitive!
Apply VRF to selected interfaces
Router(config-if)# ip vrf forwarding Company-A
Router(config-if)# ip address 10.1.1.1 255.255.255.0
If there is an IP address in selected interfaces, it will removed, you need to reconfigure new ip address for VRF -> be aware!