Recommendations for Configuring VSRP Fast Start

The following recommendations apply to configurations where multiple VSRP instances are running between peer devices sharing the same set of ports:

  • Multiple VSRP instances configured on the same ports can cause VSRP instances to be completely cut off from peer VSRP instances. This can cause VSRP instances to toggle back and forth between Master and Backup mode. For this reason, we recommend that you configure VSRP fast start on a per-port basis rather than for the entire VLAN.
  • We recommend that VSRP peers have a directly connected port without VSRP fast start enabled on it. This allows protocol control packets to be received and sent even if other ports between the Master and Backup devices are down.
  • The VSRP restart time should be configured based on the type of connecting device since some devices can take a long time to bring a port up or down (as long as several seconds). In order to ensure that the port restart is registered by neighboring devices, the restart time may need to be changed to a value higher than the default value of 1 second.
Parent topic: VSRP Fast Start