Standby Timers - Edge-Core ES4612 Management Manual

standby timers

This command sets the time between the master and standby router sending hello
packets, and the time before other routers declare the active master router or
standby router down. Use the no form to restore the default timer values.
Syntax
standby [group] timers hellotime holdtime
no standby [group] timers
• group - Identifies the HSRP group. (Range: 0-255)
• hellotime - Advertisement interval for the master and standby virtual router.
(Range: 1-254 seconds)
• holdtime - Time before the master or standby router is declared down.
(Range: hellotime+1 to 255 seconds)
Default Setting
Group number: 0
Hellotime: 3 seconds
Holdtime: 10 seconds
Command Mode
Interface (VLAN)
Command Usage
• HSRP advertisements from the master and standby virtual router include
information about their priority, timer values, and current state as the master
or standby router.
• Routers on which the timer settings have not been configured can learn the
current timer values from the master or standby router. Timers configured on
the master router always override any other timer settings. All routers in an
HSRP group should be configured with the same timer values.
• If the master router stops sending advertisements, backup routers will bid to
become the master based on priority. The hold time before declaring a router
dead should be normally be set to a value 3 times or more than the hello time.
• HSRP advertisements are sent to the multicast address 224.0.0.2. Using a
multicast address reduces the amount of traffic that has to processed by
network devices that are not part of the designated HSRP group.
Example
This example sets the timers for group 1 to 6 seconds for the hello time, and 18
seconds for the hold time.
Console(config-if)#standby 1 timers 6 18
Console(config-if)#
Router Redundancy Commands
4
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