US Region
Grandmetric LLC
Brookfield Place Office
200 Vesey Street
New York, NY 10281
EIN: 98-1615498
Phone: +1 302 691 94 10
EMEA Region
GRANDMETRIC Sp. z o.o.
ul. Metalowa 5, 60-118 Poznań, Poland
NIP 7792433527
+48 61 271 04 43
info@grandmetric.com
Technology: Routing
Area: NHRP
Vendor: Cisco
Software: 12.X , 15.X
Platform: Catalyst platforms, Routing platforms
The Virtual Router Redundancy Protocol (VRRP) is an election protocol that dynamically assigns responsibility for one or more virtual routers to the VRRP routers on a LAN, allowing several routers on a multiaccess link to utilize the same virtual IP address. In a VRRP configuration, one router is elected as the virtual router master, with the other routers acting as backups in case the virtual router master fails. VRRP is designed for use over multiaccess, multicast, or broadcast capable Ethernet LANs
To enable VRRP (basic config), use the following command on router 1:
Router1(config)# interface GigabitEthernet 0/1
Router1(config-if)#ip address 10.1.1.2 255.255.255.0
Router1(config-if)# vrrp 10 priority 120
Router1(config-if)# vrrp 10 ip 10.1.1.1
configure also router 2 as a backup NHRP router:
Router2(config)# interface GigabitEthernet 0/1
Router2(config-if)#ip address 10.1.1.3 255.255.255.0
Router2(config-if)# vrrp 10 priority 100
Router2(config-if)# vrrp 10 ip 10.1.1.1
