Vrrp Advertisements; Vrrp Authentication; Vrrp Tracking; Virtualization Support - Cisco Nexus 3000 Series Configuration Manual

Chapter 13 Configuring VRRP
S e n d d o c u m e n t c o m m e n t s t o n e x u s 3 k - d o c f e e d b a c k @ c i s c o . c o m

VRRP Advertisements

The VRRP master sends VRRP advertisements to other VRRP routers in the same group. The
advertisements communicate the priority and state of the master. Cisco NX-OS encapsulates the VRRP
advertisements in IP packets and sends them to the IP multicast address assigned to the VRRP group.
Cisco NX-OS sends the advertisements once every second by default, but you can configure a different
advertisement interval.

VRRP Authentication

VRRP supports the following authentication mechanisms:
•
•
VRRP rejects packets in any of the following cases:
•
•

VRRP Tracking

VRRP supports the following two options for tracking:
•
•
If the tracked state (interface or object) goes down, VRRP updates the priority based on what you
configure the new priority to be for the tracked state. When the tracked state comes up, VRRP restores
the original priority for the virtual router group.
For example, you may want to lower the priority of a VRRP group member if its uplink to the network
goes down so another group member can take over as master for the VRRP group. See the
VRRP Interface State Tracking" section on page 13-15
VRRP does not support Layer 2 interface tracking.
Note

Virtualization Support

VRRP supports Virtual Routing and Forwarding instances (VRFs). By default, Cisco NX-OS places you
in the default VRF unless you specifically configure another VRF.
If you change the VRF membership of an interface, Cisco NX-OS removes all Layer 3 configuration,
including VRRP.
For more information, see
No authentication
Plain text authentication
The authentication schemes differ on the router and in the incoming packet.
Text authentication strings differ on the router and in the incoming packet.
Native interface tracking— Tracks the state of an interface and use that state to determine the
priority of the VRRP router in a VRRP group. The tracked state is down if the interface is down or
if the interface does not have a primary IP address.
Object tracking—Tracks the state of a configured object and use that state to determine the priority
of the VRRP router in a VRRP group. See
information on object tracking.
Chapter 9, "Configuring Layer 3 Virtualization."
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
Chapter 14, "Configuring Object Tracking"
for more information.
Information About VRRP
for more
"Configuring
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