CHAPTER
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20-1
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
20
Configuring VRRP
This chapter describes how to configure the Virtual Router Redundancy Protocol (VRRP) on a device
This chapter includes the following sections:
• Information About VRRP, page 20-1
• Licensing Requirements for VRRP, page 20-6
• Guidelines and Limitations, page 20-6
• Configuring VRRP, page 20-7
• Verifying the VRRP Configuration, page 20-19
• Displaying VRRP Statistics, page 20-20
• VRRP Example Configuration, page 20-20
• Default Settings, page 20-21
• Additional References, page 20-22
• Feature History for VRRP, page 20-22
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 20-2
• VRRP Benefits, page 20-3
• Multiple VRRP Groups, page 20-3
• VRRP Router Priority and Preemption, page 20-4
• vPC and VRRP, page 20-5
• VRRP Advertisements, page 20-5
• VRRP Authentication, page 20-5
• VRRP Tracking, page 20-5
• High Availability, page 20-6
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