cmdref.net is command references/cheat sheets/examples for system engineers.
| Cloud |
|---|
| Etc |
|---|
| Reference |
|---|
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
| 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 |
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
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
Router(config)# ip route vrf CustomerA 10.1.1.0 255.255.255.0 192.168.1.1
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>
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
Router(config)# router eigrp <ASNUMBER> Router(config)# address-family ipv4 vrf <VRFNAME> Router(config)# network <IPADDRESS> <WILDCARD> Router(config)# autonomous-system <ASNUMBER>
Router(config)# router ospf PID vrf VRFNAME Router(config)# network x.x.x.x 0.0.0.255 area AREANUMBER