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
Gateway Load Balancing Protocol (GLBP) is one of the NHRP kind protocols that protects traffic from a router or circuit failure. GLBP behaves very similar to Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP). GLBP communicates over Layer 2.
To configure GLBP (basic configuration), use the following command on first router (primary):
Router1(config)# interface GigabitEthernet 0/1
Router1(config-if)#ip address 10.1.1.2 255.255.255.0
Router1(config-if)# glbp 10 ip 10.1.1.1
Router1(config-if)# glbp priority 150
Router1(config-if)# exit
Configure the backup GLBP router:
Router2(config)# interface GigabitEthernet 0/1
Router2(config-if)#ip address 10.1.1.3 255.255.255.0
Router2(config-if)# glbp 10 ip 10.1.1.1
Router2(config-if)# exit
Hosts will use 10.1.1.1 as active address (default gateway). Default GLBP priority is 100, the higher wins and is elected on active router. If priorities are the same, the higher priority wins the active gateway election.
