Configure VRRP

Configure VRRP Options

VRRP options are global VRRP properties that you configure on a Versa Operating System^TM (VOS^TM) device.

To configure VRRP options:

1. In the Director view:
   1. Select the Configuration tab in the top menu bar.
   2. Select Devices > Devices in the horizontal menu bar.
   3. Select an organization in the left menu bar.
   4. Select a Controller node in the main pane. The view changes to Appliance view.
2. Select the Configuration tab in the top menu bar.
3. Select Networking > VRRP > Options in the left navigation bar. The VRRP Options pane displays.
   
   
    
4. Click the Edit icon. In the Edit VRRP Options popup window, enter information for the following fields.
   
   
    

   Field	Description
   MAC Address Mode	Select the type of MAC address to use for VRRP: Physical Virtual. This is the default.
   Version	Select the VRRP version to use: VRRP version 2 VRRP version 3. This is the default.
   Alarm Logs Soak Time	Enter how long VRRP waits to determine whether a condition is transient or persistent, in seconds. If the condition is persistent, VRRP sends an alarm and reports the condition in the versa-vrrpd.log file. Range: 0 through 65535 seconds Default: None
   IPv4 Checksum with Pseudoheader	Click to enable calculation of the VRRP checksum.

Note that for Releases 21.2.1 and later, use of the Unicast Peer IP Address option is deprecated, and this field has been removed from the Edit VRRP Options popup window.

5. Click OK.

Configure VRRP Groups

To use VRRP, you configure VRRP groups. The procedure in this section describes how to configure VRRP by specifying an interface name. You can also configure VRRP when you are configuring an Ethernet interface, as described in Configure Interfaces.

To configure VRRP by specifying an interface name:

1. In the Director view:
   1. Select the Configuration tab in the top menu bar.
   2. Select Devices > Devices in the horizontal menu bar.
   3. Select an organization in the left menu bar.
   4. Select a Controller node in the main panel. The view changes to Appliance view.
2. Select the Configuration tab in the top menu bar.
3. Select Networking > VRRP > Groups in the left navigation bar.
4. Select the V4 or V6 tab and click the Add icon. The main pane displays the VRRP groups that are already configured.
   
   
5. In the Add VRRP Group popup window, select the General tab, and enter information for the following fields.
   
   
    

   Field	Description
   Group ID	Enter a text identifier for the VRRP group.
   Interface	Select the interface assigned to the interface on which the VRRP group is configured.
   Unit	Select the subinterface on which to configure the VRRP group.
   Inherit Configuration (Group of Fields)	Click to have VRRP inherit the properties of another interface.
   Interface Name	Select the name of the interface from which to have VRRP inherit properties.
   VRRP Group ID	Enter the VRRP group ID.
   Preempt Mode	Select how the VRRP active router is elected from among the routers in the VRRP group: Non-Preempt—When a VRRP active router goes down and a backup router takes over as the active router, the previous active router remains a backup router when it comes back up in spite of the fact that it has a higher priority than the router that has taken over the active role. Preempt—When a VRRP active router goes down and a backup router takes over as the active router, the previous active router takes over again as the active router as soon as it comes back up, because it has a higher priority than the backup router. This is the default. Default: Preempt
   Address	Enter the IP address to associate with the VRRP group.
   Priority	Enter the priority to assign to the interface. The interface with the higher or highest priority becomes the VRRP active router. When you configure a VRRP priority value, be aware that value can be reduced by various objects that VRRP can track, such as interfaces, routes, monitor objects, and HA state. When you choose a priority value, you must make sure that you account for a worst-case scenario so that the priority never goes below 0. As an example, consider a VRRP group that is configured on the interface vni-0/0.0 with priority of 200 and that is tracking the interface vni-0/1.0, which has a priority cost of 20. When the vni-0/1.0 goes down, its priority cost is subtracted from the configured priority of 200. As a result, the current (dynamic) priority becomes (200 – 20), or 180. In this example, the vni-0/1.0 interface is the tracking object. Range: 1 through 254 Default: 100
   Virtual Address	Enter the virtual address or addresses to include in the VRRP group.
   Advertisements Threshold	Enter the number of VRRP advertisements that the backup router can miss before declaring the active router to be down. If you are configuring VRRP on Azure VMs, adjust the advertisement threshold to either 7 or 10, to provide time for Azure to update the next-hop IP address in the Azure user-defined routing (UDR) tables.
   Warmup Interval	Enter how long the interface waits before determining which VRRP router is the active and which is the backup. Range: 1 through 3600 seconds Default: 30 seconds
   Fast Interval	For VRRP Version 3 only, enter how often the active and backup routers exchange VRRP advertisement messages. Range: 10 through 50000 milliseconds Default: 1000 milliseconds
   HA Slave Priority Cost	Enter the value subtracted from the priority when the interchassis HA state of the VOS device changes from active to standby. Range: 1 through 254 Default: 100
   Unicast Peer IP Address	Enter the IP address of the VRRP peer node to have the VRRP group operate in unicast mode.
   Accept Data	Click to have the interface accept data when received. Otherwise, the data is routed to another interface.

6. Select the Track tab to configure VRRP tracking. VRRP tracking allows the VOS device to decrease the priority of its VRRP group when one or multiple events occur. At any given time, the VRRP device with the highest priority owns the IP address on the interface. VRRP tracking allows you to configure which events cause the interface to give up its IP address to a VRRP peer. You can configure VRRP to track interface, route, or monitor objects. Note that these objects are mutually exclusive; you can configure VRRP tracking for only one of them.
   1. For all three VRRP tracking objects, configure the priority hold time.
      
      
       

      Field

      Description

      Priority Hold Time

      Enter the virtual router priority hold time, in seconds. This timer controls how long a device that is an active router keeps the IP address when an event occurs that make it less prioritized. For example, suppose a route on the device is tracked and the route becomes unavailable. If the hold time value is 10, the device keeps the IP address for 10 seconds. If, after 10 seconds, the device still has a lower VRRP priority than its neighbors, it gives up the IP address. If both the VRRP active and VRRP backup router lose the same route, they decrease their priority equally and no IP address switchover occurs. Range: 0 through 3600 seconds Default: 0 seconds

   2. To configure VRRP tracking using interfaces, select the Interface tab. Enter information for the following fields.
      
      
       

      Field	Description
      Name	Select the primary interface on the active router in the VRRP group.
      Priority Cost	Enter the value to subtract from the VRRP group priority if the interface goes down.The VRRP router with the highest priority in the VRRP group then becomes the active router. You can track more than one interface at a time, and if one of the interfaces goes down, each interface monitor individually subtracts its priority cost. For example, suppose you track two interfaces and set the priority cost for each of them to 100. If one of the interfaces goes down, the VRRP group priority decreases by 100. If both interfaces go down, the VRRP group priority decreases by 200. Range: 1 through 254 Default: 100
      Add icon	Click the Add icon to add the interface, and then click OK.

2. To configure VRRP tracking using routes, select the Routes tab. Enter information for the following fields.
   
   
    

   Field	Description
   Prefix	Enter the IPv4 or IPv6 prefix and length of the interface on which VRRP group is configured.
   Routing Instance	Select the routing instance to which the route applies.
   Priority Cost	Enter the value to subtract from the VRRP group priority if the interface goes down.The VRRP router with the highest priority in the VRRP group then becomes the active router. You can track more than one prefix at a time. Each prefix is tracked separately, and the priority cost is subtracted if the prefix is no longer available. Range: 1 through 254 Default: 100
   Add icon	Click the Add icon to add the interface, and then click OK.

3. To configure VRRP tracking using IP SLA monitors, select the Monitors tab. Enter information for the following fields. VRRP uses the objects to track the monitor state, and depending on the state, the VRRP group decreases its priority cost. Enter information for the following fields.
   
   
    

   Field	Description
   Name	Select the monitor to use for tracking. For more information, see Configure IP SLA Monitor Objects.
   Priority Cost	Enter the value to subtract from the VRRP group priority if the interface goes down. The VRRP router with the highest priority in the VRRP group then becomes the active router. You can add more than one monitor. Each monitor is tracked separately, and each subtracts its priority cost if it goes down. Range: 1 through 254 Default: 100
   Add icon	Click the Add icon to add the interface, and then click OK.

Configure VRRP on Azure VMs

To configure high availability (HA) redundancy for Azure virtual machines (VMs), you can use VRRP. To implement this, you must configure both the VOS software and the Azure public cloud. To configure the VOS software, you create a redundant pair of VMs for Azure that run VRRP. In the Azure public cloud, you establish HA using either Azure managed identity or an Azure standard load balancer.

For more information about Azure VMs, see Install on Azure.

Supported Software Information

Releases 20.2 and later support all content described in this article, except:

• For Releases 21.2.1 and later, the Unicast Peer IP Address option in the Edit VRRP Options screen is deprecated.

Related Information

Configure Basic Features
Configure Interfaces
Configure IP SLA Monitor Objects
Create Post-Staging Templates
Install on Azure