Dell BigIron RX Series, Configuration Manual

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438 BigIron RX Series Configuration Guide
53-1002253-01
Configuring optional VSRP parameters
15
Syntax: [no] backup-hello-interval <units>
The <units> parameter specifies the message interval and can be from 60 – 3600 units (1 unit =
100 milliseconds). The default is 60 units (6000 milliseconds or 6 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.
BigIron RX(config-vlan-200-vrid-1)# hold-down-interval 4
Syntax: [no] hold-down-interval <units>
The <units> parameter specifies the hold-down interval and can be from 2 – 84 units (1 unit = 100
milliseconds). The default is 3 (3 units = 300 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” on page 439.
To change the track priority, enter a command such as the following at the configuration level for
the VRID.
BigIron RX(config-vlan-200-vrid-1)# backup track-priority 2
Syntax: [no] backup [priority <value> ] [track-priority < value> ]