Virtual Router Redundancy Protocol - History

History

VRRP is based on Cisco's proprietary Hot Standby Router Protocol (HSRP) concepts. The protocols, while similar in concept, are not compatible. Therefore, on newer installations VRRP is usually implemented, because it is the standard and is supported by many router and switch products.

  • (Cisco Example) VLAN Tagging
track 1 interface Serial0/0/0.1 ip routing ! Points at the interface that needs to be Prioritized interface fastethernet0/0.1 ! VLANs have to be on a Sub-Interface, It is best practice to match the Sub-Interface # and the VLAN # encapsulation dot1q 1 ! Enables IEEE 802.1Q VLAN frame tagging, followed by the VLAN # that this sub-interface will route ip address x.x.x.x 255.255.255.0 ! Make sure the IP is on the same subnet as the virtual Gateway1 vrrp 1 priority 110 ! The Priority of the Gateway1 vrrp 1 ip ! The Virtual Gateway for the VLAN 1 vrrp 1 preempt delay minimum 20 ! If the other router fails it will wait 20 sec before becoming the master vrrp 1 track 1 decrement 15 ! If the S0/0/0.1 Link fails, This command drops the priority by 15 ! interface fastethernet0/0.5 ! VLANs have to be on a Sub-Interface, It is best practice to match the Sub-Interface # and the VLAN # encapsulation dot1q 5 ! Enables IEEE 802.1Q VLAN frame tagging, followed by the VLAN # that this sub-interface will route ip address x.x.x.x 255.255.255.0 ! Make sure the IP is on the same subnet as the virtual Gateway2 vrrp 5 priority 110 ! The Priority of the Gateway2 vrrp 5 ip ! The Virtual Gateway for the VLAN 5 vrrp 5 preempt delay minimum 20 ! If the other router fails it will wait 20 sec before becoming the master vrrp 5 track 1 decrement 15 ! If the Fa0/0.5 Link fails, This command drops the priority by 15 ! router bgp network mask 255.255.255.0 ! Broadcasts Gateway1 out the WAN through BGP network mask 255.255.255.0 ! Broadcasts Gateway2 out the WAN through BGP

Read more about this topic:  Virtual Router Redundancy Protocol

Famous quotes containing the word history:

    “I cannot be much pleased without an appearance of truth; at least of possibility—I wish the history to be natural though the sentiments are refined; and the characters to be probable, though their behaviour is excelling.”
    —Frances Burney (1752–1840)

    “All things are moral. That soul, which within us is a sentiment, outside of us is a law. We feel its inspiration; out there in history we can see its fatal strength.”
    —Ralph Waldo Emerson (1803–1882)

    “Like their personal lives, women’s history is fragmented, interrupted; a shadow history of human beings whose existence has been shaped by the efforts and the demands of others.”
    —Elizabeth Janeway (b. 1913)