Table of Contents
Cisco VRF Configuration Examples
Table of Contents
About VRF
- VRF stands for Virtual Routing Forwarding.
VRFs are like VLANs for routers, instead of using a single global routing table we can use multiple virtual routing tables.
Each interface of the router is assigned to a different VRF.
VRFs are commonly used for MPLS deployments, when we use VRFs without MPLS then we call it VRF lite.
VRF Lite Configuration on Cisco IOS
Cisco VRF Image
Cisco VRF Commands
| Operation | Commands |
|---|---|
| Check vrf (Name, Default RD, Interfaces) | Router# sh vrf Router# show vrf Router# show vrf detail |
| Check vrf (Name, Default RD, Protocols, Interfaces) | Router# sh ip vrf Router# show ip vrf |
| Check VRF Protocol is up/down | Router# show ip vrf interfaces VRFNAME |
| Check ip routing | Router# show ip route vrf VRFNAME |
| Check Ping | Router# ping vrf VRFNAME DESTINATION Router# ping vrf VRFNAME 192.168.10.5 Router# ping vrf VRFNAME 192.168.10.5 source vlan 10 |
| Check Traceroute | Router#traceroute vrf VRFNAME DESTINATION Router#traceroute vrf VRFNAME 192.168.0.100 |
| telnet with vrf | telnet x.x.x.x /vrf VRFNAME |
| ssh with vrf | ssh -l USER -v 2 -vrf VRFNAME x.x.x.x ssh -l root -v 2 -vrf VRF-test 192.168.0.100 |
| Check BGP with VRF | Router# show ip protocols vrf VRFNAME router# show bgp vrf XXX all summary |
| Multicast | Router# show ip mroute vrf XXXX Router# show ip igmp vrf XXXX membership Router# show ip pim vrf XXXX rp |
Setting
Definition of VRF Interface
RD(Route Distinguisher) is VRF identifier.
xx:yy. In xx, AS number is often used. Sometimes there is an IP address.
Router(config)# ip vrf CustomerA Router(config-vrf)# rd 1:100 Router(config-vrf)# exit Router#show ip vrf
Apply VRF to Interface
Router(config)# interface GigabitEthernet 0/0 Router(config-if)# ip vrf forwarding CustomerA Router(config-if)# ip address 192.168.1.254
Router(config)# interface Vlan100 Router(config-if)# ip vrf forwarding CustomerA Router(config-if)# ip address 192.168.1.254
Apply Routing to VRF
Static Route
Router(config)# ip route vrf CustomerA 10.1.1.0 255.255.255.0 192.168.1.1
BGP
Router(config)#router bgp <local_as> Router(config-router)#address-family ipv4 vrf <vrf_name> Router(config-router-af)# neighbor <remote_addr> remote <remote_as>
Example
router bgp 10000 address-family ipv4 vrf VRF-1 neighbor 10.10.0.2 remote-as 10002 neighbor 10.10.0.2 activate no auto-summary no synchronization network 2.2.2.2 mask 255.255.255.255 exit-address-family
EIGRP
Router(config)# router eigrp <ASNUMBER> Router(config)# address-family ipv4 vrf <VRFNAME> Router(config)# network <IPADDRESS> <WILDCARD> Router(config)# autonomous-system <ASNUMBER>
OSPF
Router(config)# router ospf PID vrf VRFNAME Router(config)# network x.x.x.x 0.0.0.255 area AREANUMBER
- Cisco ACL Configuration Examples
- Cisco Basic Settings
- Cisco Basic Operation Command
- Cisco BGP CLI Commands and Configuration Examples
- Cisco Check Commands
- Cisco Configuration Command Examples
- Investigating a Cisco crash
- Cisco EIGRP CLI Commands and Configuration Examples
- Cisco Etherchannel Configuration Examples
- Cisco HSRP, MHSRP Configuration Examples
- Cisco Interface Configuration Examples
- Cisco IPSec VPN Configuration Examples
- Cisco Logging Configuration Examples
- Cisco Login User and Password Configuration (SSH, RADIUS)
- Cisco Mac address Command Example with Arp table and Mac Address Table
- Cisco NAT Configuration Examples
- Cisco SPAN & RSPAN Configuration Examples
- Cisco Stack Configuration Examples
- Cisco Statick Route Configuration Examples
- Cisco Time Configuration, NTP and PTP Examples
- Cisco VLAN Configuration Examples
- Cisco VRF Configuration Examples
- Cisco Wildcard Mask