Vrf - cisco

Les VRF sont aux routeurs ce que les Vlans sont aux commutateurs. Elles permettent de générer des routeurs logiques avec autant de tables de routage et donc de cloisonner des réseaux de niveau 3.

Schéma réseau

Voici l'architecture que nous utilisons pour ce tuto:

Configuration

R1

ip vrf ALPHA
 rd 105:1

interface FastEthernet0/0
 ip vrf forwarding ALPHA
 ip address 192.168.1.254 255.255.255.0
 duplex auto
 speed auto

interface FastEthernet0/1
 ip vrf forwarding ALPHA
 ip address 1.1.1.2 255.255.255.252
 duplex auto
 speed auto

router ospf 1 vrf ALPHA
 log-adjacency-changes
 network 1.1.1.0 0.0.0.3 area 0
 network 192.168.1.0 0.0.0.255 area 0

R2

ip vrf BRAVO
 rd 105:2

interface FastEthernet0/0
 ip vrf forwarding BRAVO
 ip address 192.168.2.254 255.255.255.0
 duplex auto
 speed auto

interface FastEthernet0/1
 ip vrf forwarding BRAVO
 ip address 1.1.1.6 255.255.255.252
 duplex auto
 speed auto

router ospf 2 vrf BRAVO
 log-adjacency-changes
 network 1.1.1.4 0.0.0.3 area 0
 network 192.168.2.0 0.0.0.255 area 0

R3

ip vrf ALPHA
 rd 105:1 

ip vrf BRAVO
 rd 105:2

interface FastEthernet1/12
 switchport access vlan 12

interface FastEthernet1/13
 switchport access vlan 13

interface FastEthernet1/14
 switchport access vlan 14

interface FastEthernet1/15
 switchport access vlan 15

interface Vlan3
 ip vrf forwarding ALPHA
 ip address 192.168.3.254 255.255.255.0

interface Vlan12
 ip vrf forwarding ALPHA
 ip address 1.1.1.1 255.255.255.252

interface Vlan13
 ip vrf forwarding BRAVO
 ip address 1.1.1.5 255.255.255.252

interface Vlan14
 ip vrf forwarding ALPHA
 ip address 1.1.1.13 255.255.255.252

interface Vlan15
 ip vrf forwarding BRAVO
 ip address 1.1.1.9 255.255.255.252

router ospf 1 vrf ALPHA
 log-adjacency-changes
 network 1.1.1.0 0.0.0.3 area 0
 network 1.1.1.12 0.0.0.3 area 0
 network 192.168.3.0 0.0.0.255 area 0

router ospf 2 vrf BRAVO
 log-adjacency-changes
 network 1.1.1.4 0.0.0.3 area 0
 network 1.1.1.8 0.0.0.3 area 0

R4

ip vrf ALPHA
 rd 105:1

interface FastEthernet0/0
 ip vrf forwarding ALPHA
 ip address 192.168.5.254 255.255.255.0
 duplex auto
 speed auto

interface FastEthernet0/1
 ip vrf forwarding ALPHA
 ip address 1.1.1.14 255.255.255.252
 duplex auto
 speed auto

router ospf 1 vrf ALPHA
 log-adjacency-changes
 network 1.1.1.12 0.0.0.3 area 0
 network 192.168.5.0 0.0.0.255 area 0

R5

ip vrf BRAVO
 rd 105:2

interface FastEthernet0/0
 ip vrf forwarding BRAVO
 ip address 192.168.6.254 255.255.255.0
 duplex auto
 speed auto

interface FastEthernet0/1
 ip vrf forwarding BRAVO
 ip address 1.1.1.10 255.255.255.252
 duplex auto
 speed auto

router ospf 2 vrf BRAVO
 log-adjacency-changes
 network 1.1.1.8 0.0.0.3 area 0
 network 192.168.6.0 0.0.0.255 area 0