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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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How Is the Timeout Interval of VRRP Packets Set?

How Is the Timeout Interval of VRRP Packets Set?

If the VRRP backup does not receive VRRP packets from the VRRP master within the timeout interval, the VRRP backup considers that the VRRP master does not work properly. Then the VRRP backup becomes the master.

The timeout interval of VRRP packets cannot be configured directly on a CE series switch. The calculation formula is as follows:

(3*Advertisement_Interval) + Skew_time

Where,

Advertisement_Interval specifies the interval for sending VRRP packets. The default value is 1s.

The value of Skew_Time is as follows:

Skew_Time = (256 - Priority)/256

The value of Skew_Time ranges from 0 to 1.

You can run the vrrp vrid timer advertise command to change the interval for sending VRRP packets to adjust the timeout interval of VRRP packets.

After the configuration is complete, run the display vrrp verbose command. The TimerConfig field displays the configured interval for sending VRRP packets.

<HUAWEI> display vrrp verbose
Vlanif100 | Virtual Router 1              
State             : Master                                                  
Virtual IP        : 10.1.1.100                                              
Master IP         : 10.1.1.2                                                
Send VRRP Packet To Subvlan : all                                           
PriorityRun       : 120                                                     
PriorityConfig    : 120                                                     
MasterPriority    : 120                                                     
Preempt           : YES   Delay Time : 20 s   Remain : --                   
TimerRun          : 2 s                                                     
TimerConfig       : 2 s                                                     
Auth Type         : MD5   Auth Key : ******    
Virtual MAC       : 0000-5e00-0101                                          
Check TTL         : YES                                                     
Config Type       : Normal                                             
Track BFD         : atob             Priority Reduced :20                   
BFD-session State : UP                                                      
Create Time       : 2014-10-07 15:43:42                                     
Last Change Time  : 2014-10-07 15:44:03 
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Updated: 2020-01-07

Document ID: EDOC1000060766

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