VRF Lite - IPFlow Netflow Collector
VRF Lite
From IPFlow Netflow Collector
VRF Lite Example
This is a simple example of VRF Lite configuration on Cisco routers (using Dynamips and GNS3).
Author: Christophe Fillot - 06-Nov-2007
Table of contents [showhide]
3 Dynamips/Dynagen/GNS3 configuration
Topology
IOS configurations
- R0 (http://www.ipflow.utc.fr/configs/VRF_Lite/R0.cfg)
- R1 (http://www.ipflow.utc.fr/configs/VRF_Lite/R1.cfg)
- R2 (http://www.ipflow.utc.fr/configs/VRF_Lite/R2.cfg)
- R3 (http://www.ipflow.utc.fr/configs/VRF_Lite/R3.cfg)
Dynamips/Dynagen/GNS3 configuration
You can use this configuration file (http://www.ipflow.utc.fr/configs/VRF_Lite/vrf_lite.net) directly with Dynagen or GNS3. Change the working directory and Cisco IOS image path to match your needs.
Description
As you can see, you can use VRF without MPLS on a network. It is very useful when you want to deploy network virtualization on the campus, as explained in this Cisco document (http://www.cisco.com/en/US/netsol/ns658/netbr0900aecd804a17db.html) ("VRF as an End-to-End Solution")
Configuration
- Routers R0, R1 and R2 exchange VPN routes with OSPF ;
- Routers R1 and R3 exchange routes with EIGRP.
There is an example of route redistribution between OSPF and EIGRP on router R1:
router eigrp 100
no auto-summary
!
address-family ipv4 vrf VPN3
redistribute ospf 30 vrf VPN3 metric 100000 100 255 1 1500
network 100.30.3.0 0.0.0.255
no auto-summary
autonomous-system 100
exit-address-family
!
address-family ipv4 vrf VPN2
redistribute ospf 20 vrf VPN2 metric 100000 100 255 1 1500
network 100.20.3.0 0.0.0.255
no auto-summary
autonomous-system 100
exit-address-family
!
address-family ipv4 vrf VPN1
redistribute ospf 10 vrf VPN1 metric 100000 100 255 1 1500
network 100.10.3.0 0.0.0.255
no auto-summary
autonomous-system 100
exit-address-family
!
router ospf 10 vrf VPN1
log-adjacency-changes
redistribute eigrp 100 subnets
network 100.10.0.0 0.0.255.255 area 0
!
router ospf 20 vrf VPN2
log-adjacency-changes
redistribute eigrp 100 subnets
network 100.20.0.0 0.0.255.255 area 0
!
router ospf 30 vrf VPN3
log-adjacency-changes
redistribute eigrp 100 subnets
network 100.30.0.0 0.0.255.255 area 0
!
R1 Routing tables
Global routing table:
R1#sh ip ro
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
VPN1 routing table:
R1#sh ip ro vrf VPN1
Routing Table: VPN1
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
100.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
C 100.10.2.0/30 is directly connected, FastEthernet1/0.10
O 100.10.0.2/32 [110/2] via 100.10.2.2, 00:50:51, FastEthernet1/0.10
C 100.10.3.0/30 is directly connected, FastEthernet2/0.10
D 100.10.0.3/32 [90/156160] via 100.10.3.2, 00:39:46, FastEthernet2/0.10
O 100.10.0.0/32 [110/2] via 100.10.1.1, 00:50:51, FastEthernet0/0.10
C 100.10.1.0/30 is directly connected, FastEthernet0/0.10
C 100.10.0.1/32 is directly connected, Loopback100
R3 Routing tables
Global routing table:
R3#sh ip ro
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
VPN1 routing table:
R3#sh ip ro vrf VPN1
Routing Table: VPN1
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
100.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
D EX 100.10.2.0/30 [170/53760] via 100.10.3.1, 00:30:00, FastEthernet0/0.10
D EX 100.10.0.2/32 [170/53760] via 100.10.3.1, 00:30:00, FastEthernet0/0.10
C 100.10.3.0/30 is directly connected, FastEthernet0/0.10
C 100.10.0.3/32 is directly connected, Loopback100
D EX 100.10.0.0/32 [170/53760] via 100.10.3.1, 00:30:00, FastEthernet0/0.10
D EX 100.10.1.0/30 [170/53760] via 100.10.3.1, 00:30:00, FastEthernet0/0.10
D EX 100.10.0.1/32 [170/53760] via 100.10.3.1, 00:30:00, FastEthernet0/0.10
