Протокол VRRP предназначен для резервирования маршрутизаторов, выполняющих роль шлюза по умолчанию. Это достигается путём объединения IP-интерфейсов группы маршрутизаторов в один виртуальный, который будет использоваться как шлюз по умолчанию для компьютеров в сети.
Настройки коммутаторов:
SW1:
vlan database
vlan 10
exit
no spanning-tree
ip routing
interface 1/0/1
no shutdown
switchport mode access
switchport access vlan 10
exit
interface 1/0/2-1/0/3
no shutdown
spanning-tree bpdufilter
switchport mode trunk
switchport trunk allowed vlan remove 1
exit
SW2:
vlan database
vlan 10,20
vlan routing 10 1
vlan routing 20 2
exit
no spanning-tree
ip routing
interface 1/0/1
no shutdown
spanning-tree bpdufilter
switchport mode trunk
switchport trunk allowed vlan remove 1
exit
interface 1/0/2
no shutdown
spanning-tree bpdufilter
switchport mode trunk
switchport trunk allowed vlan remove 1
exit
Ip vrrp
interface vlan 10
no shutdown
routing
ip address 10.10.10.1 255.255.255.0
ip vrrp 1
ip vrrp 1 mode
ip vrrp 1 ip 10.10.10.1
exit
interface vlan 20
no shutdown
routing
ip address 20.20.20.1 255.255.255.0
ip vrrp 2
ip vrrp 2 mode
ip vrrp 2 ip 20.20.20.1
exit
SW3:
vlan database
vlan 10,20
vlan routing 10 1
vlan routing 20 2
exit
no spanning-tree
ip routing
interface 1/0/1
no shutdown
spanning-tree bpdufilter
switchport mode trunk
switchport trunk allowed vlan remove 1
exit
interface 1/0/2
no shutdown
spanning-tree bpdufilter
switchport mode trunk
switchport trunk allowed vlan remove 1
exit
ip vrrp
interface vlan 10
no shutdown
routing
ip address 10.10.10.2 255.255.255.0
ip vrrp 1
ip vrrp 1 mode
ip vrrp 1 ip 10.10.10.1
exit
!
interface vlan 20
no shutdown
routing
ip address 20.20.20.2 255.255.255.0
ip vrrp 2
ip vrrp 2 mode
ip vrrp 2 ip 20.20.20.1
exit
SW4:
vlan database
vlan 20
exit
no spanning-tree
ip routing
interface 1/0/1
no shutdown
switchport mode access
switchport access vlan 20
exit
interface 1/0/2-1/0/3
no shutdown
spanning-tree bpdufilter
switchport mode trunk
switchport trunk allowed vlan remove 1
exit
Диагностика протокола VRRP
show ip vrrp interface brief