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:

    What is most interesting and valuable in it, however, is not the materials for the history of Pontiac, or Braddock, or the Northwest, which it furnishes; not the annals of the country, but the natural facts, or perennials, which are ever without date. When out of history the truth shall be extracted, it will have shed its dates like withered leaves.
    Henry David Thoreau (1817–1862)

    Yet poetry, though the last and finest result, is a natural fruit. As naturally as the oak bears an acorn, and the vine a gourd, man bears a poem, either spoken or done. It is the chief and most memorable success, for history is but a prose narrative of poetic deeds.
    Henry David Thoreau (1817–1862)

    Regarding History as the slaughter-bench at which the happiness of peoples, the wisdom of States, and the virtue of individuals have been victimized—the question involuntarily arises—to what principle, to what final aim these enormous sacrifices have been offered.
    Georg Wilhelm Friedrich Hegel (1770–1831)