Foundry Configuration Guide for the FESX, FSX, and FWSX
22 - 16
© Foundry Networks, Inc.
December 2005
The syntax is the same for VRRP and VRRPE.
Hello Interval
The Master periodically sends Hello messages to the Backups. The Backups use the Hello messages as
verification that the Master is still on-line. If the Backup routers stop receiving the Hello messages for the period of
time specified by the Dead interval, the Backup routers determine that the Master router is dead. At this point, the
Backup router with the highest priority becomes the new Master router. The Hello interval can be from 1 – 84
seconds. The default is 1 second.
NOTE:
The default Dead interval is three times the Hello Interval plus one-half second. Generally, if you change
the Hello interval, you also should change the Dead interval on the Backup routers.
To change the Hello interval on the Master to 10 seconds, enter the following commands:
Router1(config)# inter e 1/6
Router1(config-if-1/6)# ip vrrp vrid 1
Router1(config-if-1/6-vrid-1)# hello-interval 10
Syntax:
hello-interval <value>
The syntax is the same for VRRP and VRRPE.
Dead Interval
The Dead interval is the number of seconds a Backup waits for a Hello message from the Master before
determining that the Master is dead. When Backups determine that the Master is dead, the Backup with the
highest priority becomes the new Master. The Dead interval can be from 1 – 84 seconds. The default is 3.5
seconds. This is three times the default Hello interval (1 second) plus one-half second added by the router
software. The software automatically adds one-half second to the Dead interval value you enter.
To change the Dead interval on a Backup to 30 seconds, enter the following commands:
Router2(config)# inter e 1/5
Router2(config-if-1/5)# ip vrrp vrid 1
Router2(config-if-1/5-vrid-1)# dead-interval 30
Syntax:
dead-interval <value>
The syntax is the same for VRRP and VRRPE.
Backup Hello Message State and Interval
By default, Backup do not send Hello messages to advertise themselves to the Master. You can enable these
messages if desired and also change the message interval.
To enable a Backup to send Hello messages to the Master, enter commands such as the following:
FESX424 Router(config)# router vrrp
FESX424 Router(config)# inter e 1/6
FESX424 Router(config-if-1/6)# ip vrrp vrid 1
FESX424 Router(config-if-1/6-vrid-1)# advertise backup
Syntax:
[no] advertise backup
When you enable a Backup to send Hello messages, the Backup sends a Hello messages to the Master every 60
seconds by default. You can change the interval to be up to 3600 seconds. To do so, enter commands such as
the following:
FESX424 Router(config)# router vrrp
FESX424 Router(config)# inter e 1/6
FESX424 Router(config-if-1/6)# ip vrrp vrid 1
FESX424 Router(config-if-1/6-vrid-1)# backup-hello-interval 180
Syntax:
[no] backup-hello-interval <num>
Содержание FastIron Edge Switch X424
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