Efficient Networks 107-0001-000 manual Eth vrrp set timeinterval, Eth vrrp set priority 255

Chapter 5: Ethernet Interface Commands	Efficient Networks® Router family
	Command Line Interface Guide

-> eth vrrp set priority 255 7

This command example defines priority 50 for a backup router for VRID 7 using port 1.

-> eth vrrp set priority 50 7 1

Response

Command prompt.

eth vrrp set timeinterval

Specifies the time interval attribute in a VRRP attribute record for the VRID (virtual router ID). The time interval determines how often VRRP advertisement packets are sent, and thus, how quickly a backup router can recognize that another VRRP router is down.

NOTE:

If you do not specify a time interval value for a VRRP attribute record, the default time interval, 1 second, is used.

If the backup does not receive a VRRP packet from another VRRP router during the master down interval, the backup assumes the other router is down. The master down interval is calculated as follows:

Master _Down_Interval = (3 * Time_Interval) + Skew_Time

Skew_Time = (256 - Priority) / 256

Thus, the default skew time is (256 - 100) / 256, or .609375. The default master down interval is (3 * 1) + .609375, or 3.609375 seconds.

For more information, see “VRRP Backup” on page 6-16of the Technical Reference Guide.

NOTE:

The time interval must be the same for every router in the Virtual Router, that is, for every router in the LAN with the same VRID. For example, if a VRRP interface in routers A, B, and C has the VRID 7, routers A, B, and C must all specify the same time interval for VRID 7.

NOTE:

This command takes effect immediately, but you must save the change if it is to persist after you restart the interface or reboot the router.

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