VRRPv2

In this section:

  1. VRRPv2 Overview
    Virtual Router Redundancy Protocol (VRRP) is an election protocol that provides redundancy to routers within a Local Area Network (LAN).
  2. Enabling an Owner VRRP Device
  3. Enabling a backup VRRP device
  4. Configuring simple text authentication on VRRP interfaces
    A simple text password can be used for interface authentication in a network. VRRP uses the authentication type associated with the interfaces on which you define the virtual router ID (VRID).
  5. Configuring MD5 authentication on VRRP interfaces
    Interfaces can be configured with an MD5 encrypted password for authentication, and VRRP can use the same authentication type associated with the interfaces on which you define the virtual router ID (VRID).
  6. Abdicating VRRP master device status
    Changing the priority of a VRRP master device allows a temporary abdication of the master device status to allow a backup device with a higher priority to assume the master device role.
  7. Tracked ports and track priority with VRRP and VRRP-E
    Port tracking allows interfaces not configured for VRRP or VRRP-E to be monitored for link-state changes that can result in dynamic changes to the VRRP device priority.
  8. VRRP backup preemption
    Preemption of a backup VRRP device acting as a master device is allowed when another backup device has a higher priority.
  9. Accept mode for backup VRRP devices
    Accept mode allows a backup VRRP device to respond to ping, traceroute, and Telnet packets if the backup device becomes the master VRRP device.
  10. Suppressing RIP route advertisements on VRRP backup devices
    RIP route advertisement suppression can be enabled on VRRP backup devices to prevent other VRRP devices from learning multiple paths for a backed-up interface.
  11. VRRP-Ev2 overview
    VRRP Extended (VRRP-E) is an extended version of VRRP. VRRP-E is designed to avoid the limitations in the standards-based VRRP.
  12. Enabling a VRRP-E device
  13. VRRP-E Load-Balancing Using Short-Path Forwarding
  14. VRRP-E Hitless Upgrade
    When the Virtual Routing Redundancy Protocol Extended (VRRP-E) hitless upgrade capability is configured, traffic loss can be avoiding during the failover process when an upgrade is installed or when troubleshooting is being performed on a VRRP-E master device.
  15. VRRP-E slow start timer
    In a VRRP extended (VRRP-E) configuration, if a master device goes offline, the backup router with the highest priority takes over after the expiration of the dead interval timer. When the original master device is back online, you can configure a slow-start timer interval that extends the time interval beyond the dead interval before the original master device transitions back to the role of master device.
  16. Configuration Example: ISSU Upgrade Using VRRP-E
    Using VRRP-E, an In Service Software Upgrade (ISSU) can be performed with minimal downtime.
  17. Displaying VRRPv2 Information
    Various show commands can be used to display statistical and summary information about VRRP and VRRP-E configurations.
  18. Clearing VRRPv2 statistics
    VRRPv2 session counters can be cleared using a CLI command.