Cisco Nexus 7000 Series - High Availability; Virtualization Support; Licensing Requirements for VRRP; Guidelines and Limitations

Send document comments to nexus7k-docfeedback@cisco.com.
20-6
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 20 Configuring VRRP
Licensing Requirements for VRRP
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 “Configuring
VRRP Interface State Tracking” section on page 20-17 for more information.
Note VRRP does not support Layer 2 interface tracking.
High Availability
VRRP supports stateful restarts and stateful switchover. A stateful restart occurs when the VRRP process
fails and is restarted. Stateful switchover occurs when the active supervisor switches to the standby
supervisor. Cisco NX-OS applies the run-time configuration after the switchover.
Virtualization Support
VRRP supports Virtual Routing and Forwarding instances (VRFs). VRFs exist within virtual device
contexts (VDCs). By default, Cisco NX-OS places you in the default VDC and default VRF unless you
specifically configure another VDC and VRF.
If you change the VRF membership of an interface, Cisco NX-OS removes all layer 3 configuration,
including VRRP.
For more information, see the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration
Guide, Release 4.x and see Chapter 14, “Configuring Layer 3 Virtualization.”
Licensing Requirements for VRRP
The following table shows the licensing requirements for this feature:
Guidelines and Limitations
VRRP has the following guidelines and limitations:
• You cannot configure VRRP on the management interface.
• When VRRP is enabled, you should replicate the VRRP configuration across devices in your
network.
• We recommend that you do not configure more than one first-hop redundancy protocol on the same
interface.
Product License Requirement
NX-OS VRRP requires no license. Any feature not included in a license package is bundled with the Cisco NX-OS
system images and is provided at no extra charge to you. For a complete explanation of the NX-OS licensing
scheme, see the Cisco NX-OS Licensing Guide.