Efficient Networks 107-0001-000 - Manual (Page 186)

Chapter 5: Ethernet Interface Commands Efficient Networks ® Router family
Command Line Interface Guide
Page 5-48 Efficient Networks
®
This command example defines priority 50 for a backup router for VRID 7 using port
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:
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 6-16 of 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.
-> eth vrrp set priority 255 7
-> eth vrrp set priority 50 7 1
Master _Down_Interval = (3 * Time_Interval) + Skew_Time
Skew_Time = (256 - Priority) / 256