Netgear XCM8810 - 8800 SERIES 10-SLOT CHASSIS SWITCH ユーザーズマニュアル

VRRP Tracking

Tracking information is used to track various forms of connectivity from the VRRP router to 
the outside world. The following sections describe VRRP tracking options and how to display 
information on them:

•     VRRP Tracking Mode 

•     VRRP VLAN Tracking 

•     VRRP Route Table Tracking 

•     VRRP Ping Tracking 

ip_address

This is the IP address associated with this virtual router. You can 
associate one or more IP addresses to a virtual router. This parameter 
has no default value. For more information, see the 

configure vrrp vlan 

vrid add ipaddress

 command.

advertisement_interval

Specifies the time interval between advertisements in seconds unless 
otherwise specified as milliseconds. The default is 1 second. 

The range is 1 through 255 seconds or 100 through 999 milliseconds. 

If you must configure the range in milliseconds, specify 

the milliseconds keyword. If you enter a number from 100 
through 255 and do not specify the milliseconds keyword, the 
interval defaults to seconds. For more information, see the 

configure vrrp vlan vrid advertisement-interval

 command.

skew_time

This is the time to skew master_down_interval, in seconds. This value is 
calculated as ((256-priority)/256).

master_down_interval

This is the time interval for the backup router to declare master down, in 
seconds. This value is calculated as 



((3 * advertisement_interval) + skew_time).

preempt_mode

This controls whether a higher priority backup router preempts a lower 
priority master. A value of true allows preemption, and a value of false 
prohibits preemption. The default setting is true.

The router that owns the virtual router IP address 

always preempts, independent of the setting of this parameter. 
For more information, see the 

configure vrrp vlan vrid preempt

 

or the 

configure vrrp vlan vrid dont-preempt

 commands.

preempt_timer

The preempt timer defines a preempt delay period for a preempting 
master. For more information, see the 

configure vrrp vlan vrid preempt

 

command.

track mode

The track option controls the behavior of the VRRP router when one of 
the tracked entities fails or comes back from failure.

For more information, see the 

configure vrrp vlan <vlan_name> 

vrid <vridval> track-mode [all | any]

 command description.