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

<source lang="bash"> 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

</source>

R2

<source lang="bash"> 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

</source>

R3

<source lang="bash"> 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

</source>

R4

<source lang="bash"> 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

</source>

R5

<source lang="bash"> 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

</source>