Motorola WiNG 5 System Reference Manual page 191

Virtual IP Addresses
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Interval Unit
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Interval
Preempt
Preempt Delay
Interface
10. Refer to the Protocol Extension
Sync Group
Network Monitoring:
Local Interface
Network Monitoring:
Critical Resources
Network Monitoring:
Delta Priority
Provide up to 8 IP addresses representing the Ethernet switches, routers or
security appliances defined as virtual router resources to the AP-7131 access
point.
Select either seconds, milliseconds or centiseconds as the unit used to define
VRRP advertisements. Once an option is selected, the spinner control becomes
enabled for that Advertisement Interval
seconds. If changing the VRRP group version from 2 to 3, ensure the
advertisement interval is in centiseconds. Use VRRP group version 2 when the
advertisement interval is either in seconds or milliseconds.
Once a Advertisement Interval Unit has been selected, use the spinner control
to set the Interval at which the VRRP master sends out advertisements on each
of its configured VLANs. The default setting is 1 second.
Select this option to ensure a high priority backup router is available to
preempt a lower priority backup router resource. The default setting is
enabled. When selected, the Preempt Delay option becomes enabled to set the
actual delay interval for pre-emption. This settings determines if a node with
a higher priority can takeover all the Virtual IPs from the nodes with a lower
priority.
If the Preempt option is selected, use the spinner control to set the delay
interval (in seconds) for pre-emption.
Select this value to enable/disable VRRP operation and define the AP-7131
VLAN (1 - 4,094) interface where VRRP will be running. These are the
interfaces monitored to detect a link failure.
field to define the following:
Select the option to assign a VRRP sync group to this VRRP ID's group of virtual
IP addresses. This triggers VRRP failover if an advertisement is not received
from the virtual masters that are part of this VRRP sync group. This setting is
disabled b y default.
Select the wwan1, pppoe1 and VLAN ID(s) as needed to extend VRRP
monitoring to these local access point interfaces. Once selected, these
interfaces can be assigned an increasing or decreasing level or priority for
virtual routing within the VRRP group.
Assign the priority level for the selected local interfaces. Backup virtual routers
can increase or decrease their priority in case the critical resources connected
to the master router fail, and then transition to the master state themselves.
Additionally, the master virtual router can lower its priority if the critical
resources connected to it fails, so the backup can transition to the master
state. This value can only be set on the backup or master router resource, not
both. Options include None, increment-priority, decrement priority.
Use this setting to decrement the configured priority (by the set value) when
the monitored interface is down. When critical resource monitoring, the
configured value is incremented by the value defined.
Device Configuration 5 - 131
option. The default interval unit is