VRRP – Virtual Router Redundancy Protocol
Configuration des interfaces
R1(config)#int fa0/0 R1(config-if)#ip address 192.168.80.251 255.255.255.0 R1(config-if)#no shutdown R2(config)#int fa0/0 R2(config-if)#ip address 192.168.80.252 255.255.255.0 R2(config-if)#no shutdown
Configuration VRRP
R1(config)#int fa0/0 R1(config-if)#vrrp 1 ip 192.168.80.254 R1(config-if)#vrrp 1 priority 200 R1(config-if)#vrrp 2 ip 192.168.80.150 R2(config)#int fa0/0 R2(config-if)#vrrp 1 ip 192.168.80.254 R2(config-if)#vrrp 2 ip 192.168.80.150 R2(config-if)#vrrp 2 priority 200
Vérification
R1#show vrrp brief Interface Grp Pri Time Own Pre State Master addr Group addr Fa0/0 1 200 3218 Y Master 192.168.80.251 192.168.80.254 Fa0/0 2 100 3609 Y Backup 192.168.80.252 192.168.80.150 R2#show vrrp brief Interface Grp Pri Time Own Pre State Master addr Group addr Fa0/0 1 100 3609 Y Backup 192.168.80.251 192.168.80.254 Fa0/0 2 200 3218 Y Master 192.168.80.252 192.168.80.150
TIMER
les timers peuvent être spécifiés en milisecondes
R1(config)#int fa0/0 R1(config-if)#vrrp 1 timers advertise 10 R2(config)#int fa0/0 R2(config-if)#vrrp 1 timers learn
Vérification
R2#show vrrp FastEthernet0/0 - Group 1 State is Backup Virtual IP address is 192.168.80.254 Virtual MAC address is 0000.5e00.0101 Advertisement interval is 1.000 sec Preemption enabled Priority is 100 Master Router is 192.168.80.251, priority is 200 Master Advertisement interval is 10.000 sec Master Down interval is 30.609 sec (expires in 27.517 sec) Learning FastEthernet0/0 - Group 2 State is Master Virtual IP address is 192.168.80.150 Virtual MAC address is 0000.5e00.0102 Advertisement interval is 1.000 sec Preemption enabled Priority is 200 Master Router is 192.168.80.252 (local), priority is 200 Master Advertisement interval is 1.000 sec Master Down interval is 3.218 sec
Configuration iso R1/R2
R1(config)#int fa0/0 R1(config-if)#vrrp 1 timers advertise 10 R1(config-if)#vrrp 1 timers learn R2(config)#int fa0/0 R2(config-if)#vrrp 1 timers advertise 10 R2(config-if)#vrrp 1 timers learn
Authentification
R1(config)#int fa0/0 R1(config-if)#vrrp 1 authentication CISCO123 R2(config)#int fa0/0 R2(config-if)#vrrp 1 authentication CISCO123
Vérification
R1#show vrrp FastEthernet0/0 - Group 1 State is Master Virtual IP address is 192.168.80.254 Virtual MAC address is 0000.5e00.0101 Advertisement interval is 10.000 sec Preemption enabled Priority is 200 Authentication text "CISCO123" Master Router is 192.168.80.251 (local), priority is 200 Master Advertisement interval is 10.000 sec Master Down interval is 30.218 sec FastEthernet0/0 - Group 2 State is Backup Virtual IP address is 192.168.80.150 Virtual MAC address is 0000.5e00.0102 Advertisement interval is 1.000 sec Preemption enabled Priority is 100 Master Router is 192.168.80.252, priority is 200 Master Advertisement interval is 1.000 sec Master Down interval is 3.609 sec (expires in 2.921 sec)
Descriptions
il est possible de positionner une description sur chaque instances vrrp de chaque routeur :
R1(config)#int fa0/0 R1(config-if)#vrrp 1 description Je suis master vrrp du group 1 R1#show vrrp FastEthernet0/0 - Group 1 Je suis master vrrp du group 1 State is Master Virtual IP address is 192.168.80.254 Virtual MAC address is 0000.5e00.0101 Advertisement interval is 10.000 sec Preemption enabled Priority is 200 Authentication text "CISCO123" Master Router is 192.168.80.251 (local), priority is 200 Master Advertisement interval is 10.000 sec Master Down interval is 30.218 sec FastEthernet0/0 - Group 2 State is Backup Virtual IP address is 192.168.80.150 Virtual MAC address is 0000.5e00.0102 Advertisement interval is 1.000 sec Preemption enabled Priority is 100 Master Router is 192.168.80.252, priority is 200 Master Advertisement interval is 1.000 sec
PREEMPT
par défaut, le mode preemptif est activé dans les groupes vrrp
R1(config)#int fa0/0
R1(config-if)#no vrrp 1 preempt
R1(config-if)#no vrrp 2 preempt
Vérifications:
R1#show vrrp FastEthernet0/0 - Group 1 Je suis master vrrp du group 1 State is Master Virtual IP address is 192.168.80.254 Virtual MAC address is 0000.5e00.0101 Advertisement interval is 10.000 sec Preemption disabled Priority is 200 Authentication text "CISCO123" Master Router is 192.168.80.251 (local), priority is 200 Master Advertisement interval is 10.000 sec Master Down interval is 30.218 sec FastEthernet0/0 - Group 2 State is Backup Virtual IP address is 192.168.80.150 Virtual MAC address is 0000.5e00.0102 Advertisement interval is 1.000 sec Preemption disabled Priority is 100 Master Router is 192.168.80.252, priority is 200 Master Advertisement interval is 1.000 sec Master Down interval is 3.609 sec (expires in 3.473 sec)