Implement RIP in VRF’s

To add particular VRF to RIP process just use the command:
address-family ipv4 vrf vrfname

Example:

R1:

router rip
 version 2
 no auto-summary
 !
 address-family ipv4 vrf CustC
  network 10.0.0.0
  network 192.168.1.0
  no auto-summary
  version 2
 exit-address-family
 !
 address-family ipv4 vrf CustB
  network 10.0.0.0
  network 192.168.1.0
  no auto-summary
  version 2
 exit-address-family
 !
 address-family ipv4 vrf CustA
  network 10.0.0.0
  network 192.168.1.0
  no auto-summary
  version 2
 exit-address-family
 ```

**R2:
** 
 ```
 router rip
 version 2
 no auto-summary
 !
 address-family ipv4 vrf CustC
  network 20.0.0.0
  network 192.168.1.0
  no auto-summary
  version 2
 exit-address-family
 !
 address-family ipv4 vrf CustB
  network 20.0.0.0
  network 192.168.1.0
  no auto-summary
  version 2
 exit-address-family
 !
 address-family ipv4 vrf CustA
  network 20.0.0.0
  network 192.168.1.0
  no auto-summary
  version 2
 exit-address-family
!