Specifications

CHAPTER
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Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
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Configuring VRRP
This chapter describes how to configure the Virtual Router Redundancy Protocol (VRRP) on a switch
This chapter includes the following sections:
• Information About VRRP, page 15-1
• Licensing Requirements for VRRP, page 15-6
• Guidelines and Limitations, page 15-6
• Default Settings, page 15-6
• Configuring VRRP, page 15-7
• Verifying the VRRP Configuration, page 15-17
• Displaying VRRP Statistics, page 15-17
• Configuration Examples for VRRP, page 15-18
• Additional References, page 15-19
• Feature History for VRRP, page 15-19
Information About VRRP
VRRP allows for transparent failover at the first-hop IP router, by configuring a group of routers to share
a virtual IP address. VRRP selects a master router in that group to handle all packets for the virtual IP
address. The remaining routers are in standby and take over in the event that the master router fails.
This section includes the following topics:
• VRRP Operation, page 15-2
• VRRP Benefits, page 15-3
• Multiple VRRP Groups, page 15-3
• VRRP Router Priority and Preemption, page 15-4
• VRRP Advertisements, page 15-5
• VRRP Authentication, page 15-5
• VRRP Tracking, page 15-5
• Virtualization Support, page 15-5