Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 110)

Changing the backup hello state and interval setting
By default, Backups 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 a command such as the following at
the configuration level for the VRID.
device(config-vlan-200-vrid-1)#advertise backup
Syntax: [no] advertise backup
When a Backup is enabled to send Hello messages, the Backup sends a Hello message to the Master
every 60 seconds by default. You can change the interval to be up to 3600 seconds.
To change the Backup Hello interval, enter a command such as the following at the configuration level
for the VRID.
device(config-vlan-200-vrid-1)#backup-hello-interval 180
Syntax: [no] backup-hello-interval num
The num parameter specifies the message interval and can be from 60 - 3600 seconds. The default is
60 seconds.
NOTE
If you change the timer scale, the change affects the actual number of seconds.
Changing the hold-down interval setting
The hold-down interval prevents Layer 2 loops from occurring during failover, by delaying the new
Master from forwarding traffic long enough to ensure that the failed Master is really unavailable.
To change the Hold-down interval, enter a command such as the following at the configuration level
for the VRID.
device(config-vlan-200-vrid-1)#hold-down-interval 4
Syntax: [no] hold-down-intervalnum
The num parameter specifies the hold-down interval and can be from 1 - 84 seconds. The default is 3
seconds.
NOTE
If you change the timer scale, the change affects the actual number of seconds.
Changing the default track priority setting
When you configure a VRID to track the link state of other interfaces, if one of the tracked interface
goes down, the software changes the VSRP priority of the VRID interface.
The software reduces the VRID priority by the amount of the priority of the tracked interface that went
down. For example, if the VSRP interface priority is 100 and a tracked interface with track priority 60
goes down, the software changes the VSRP interface priority to 40. If another tracked interface goes
down, the software reduces the VRID priority again, by the amount of the tracked interface track
priority.
Changing the backup hello state and interval setting
110 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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