Implement and Troubleshoot VRF Lite
VRF without MPLS
Support different routing tables on the same device
- Allows for overlapping IP addressing as long as they are in different vrf’s
- Uses input interfaces to distinguish routes form over vpns
TCAM resources are shared between all vrf’s
Does not support ISIS
Configuration
Following only works with IPv4 ip vrf [name] rd [route-distinguisher] --> required route-target {export | import | both} --> optional in vrf-lite import map route-map ---- Following works with IPv4 and IPv6 vrf definition RED rd 1:1 ! address-family ipv4 exit-address-family ! address-family ipv6 exit-address-family
Interface > ip vrf forwarding [vrf name] --> removes current IP when applied Router(config-if)#vrf forwarding RED
EIGRP
router eigrp [as] address-family ipv4 vrf VRF ---- Router(config)#router eigrp NAMED Router(config-router)#address-family ipv4 vrf RED as 1
OSPF
router ospf [process id] vrf [vrf name]
BGP
router bgp [as] address-family ipv4 vrf [vrf name]