Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 601)

Multi-Service IronWare Switching Configuration Guide 571
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Displaying VSRP 2
16
The num parameter specifies the hold-down interval and can be from 2 – 84 units of 100
milliseconds. The default is 2 units of 100 ms (200 milliseconds).
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.
Refer to
“Specifying a track port” .
To change the track priority, enter a command such as the following at the configuration level for
the VRID.
Brocade(config-vlan-200-vrid-1)# backup track-priority 2
Syntax: [no] backup [priority value] [track-priority value]
Specifying a track port
You can configure the VRID on one interface to track the link state of another interface on the
device. This capability is useful for tracking the state of the exit interface for the path for which the
VRID is providing redundancy. Refer to
“VSRP priority calculation” .
To configure a VRID to track an interface, enter a command such as the following at the
configuration level for the VRID.
Brocade(config-vlan-200-vrid-1)# track-port e 2/4
Syntax: [no] track-port ethernet slot/portnum | ve num [priority num]
The priority num parameter changes the VSRP priority of the interface. If this interface goes down,
the VRID’s VSRP priority is reduced by the amount of the track port priority you specify here.
NOTE
The priority num option changes the priority of the specified interface, overriding the default track
port priority. To change the default track port priority, use the backup track-priority num command.
Disabling or re-enabling Backup preemption
By default, a Backup that has a higher priority than another Backup that has become the Master
can preempt the Master, and take over the role of Master. If you want to prevent this behavior,
disable preemption.