HP ProCurve 9304M Installation And Configuration Manual page 328

Installation and Basic Configuration Guide
NOTE: If you change the timer scale, the change affects the actual number of seconds.
Changing the Backup Hello State and Interval
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:
HP9300(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:
HP9300(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
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:
HP9300(config-vlan-200-vrid-1)# hold-down-interval 4
Syntax: [no] hold-down-interval <num>
The <num> parameter specifies the hold-down interval and can be from 1 – 84 seconds. The default is 2 seconds.
NOTE: If you change the timer scale, the change affects the actual number of seconds.
Changing the Default Track Priority
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's priority is 100 and a tracked interface with track priority 60 goes down, the
software changes the VSRP interface's priority to 40. If another tracked interface goes down, the software
reduces the VRID's priority again, by the amount of the tracked interface's track priority.
The default track priority for all track ports is 1. You can change the default track priority or override the default for
an individual track port.
• To change the default track priority, use the backup track-priority command, described below.
• To override the default track priority for a specific track port, use the track-port command. See "Specifying a
Track Port" on page 10-33.
To change the track priority, enter a command such as the following at the configuration level for the VRID:
HP9300(config-vlan-200-vrid-1)# backup track-priority 2
Syntax: [no] backup [priority <value>] [track-priority <value>]
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