The vrrp vrid timer advertise command sets an interval at which the master device sends a VRRP Advertisement packet.
The undo vrrp vrid timer advertise command restores the default interval.
By default, the master device sends a VRRP Advertisement packet every second.
| Parameter | Description | Value |
|---|---|---|
| advertise advertise-interval |
Specifies the interval at which the master device sends a VRRP Advertisement packet. |
The value is an integer ranging from 1 to 255, in seconds. |
| vrid virtual-router-id |
Specifies the ID of a VRRP group. |
The value is an integer ranging from 1 to 255. |
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Usage Scenario
The master device in a VRRP group periodically sends VRRP Advertisement packets to the backup devices in the group to notify them of its status. You can run the vrrp vrid timer advertise command to set an interval at which the master device in the VRRP group sends a VRRP Advertisement packet.
If a backup device does not receive a VRRP Advertisement packet from the master device within a period three times the interval (As defined in relevant standards protocols: Interval specified by master-down-interval= (256 - priority)/256 + 3 x timer. According to the formula, the default interval specified by master-down-interval is about three times the interval specified by advertise-interval.) between sending VRRP Advertisement packets, the backup device considers the master device Down and preempts the Master state. If a backup device does not receive a VRRP Advertisement packet within a specified timeout period due to heavy network traffic or timer differences, a master/backup VRRP switchover is performed. To prevent this situation, configure a large interval at which the master device sends VRRP Advertisement packets.Prerequisites
A VRRP group has been configured using the vrrp vrid command.
Configuration Impact
After the vrrp vrid timer advertise command is run, the master device in the specified VRRP group on a specified interface sends a VRRP Advertisement packet at a specified interval.
Precautions
If the undo vrrp timer-advertise learning enable command has been run to disable a device from learning the interval at which VRRP Advertisement packets are sent, ensure that the devices in the VRRP group have the same time for learning the interval. An interval inconsistency causes a VRRP negotiation failure. As a result, two master devices coexist.
<HUAWEI> system-view [~HUAWEI] interface GigabitEthernet 0/1/1 [~HUAWEI-GigabitEthernet0/1/1] ip address 10.1.1.1 24 [*HUAWEI-GigabitEthernet0/1/1] vrrp vrid 1 virtual-ip 10.1.1.111 [*HUAWEI-GigabitEthernet0/1/1] vrrp vrid 1 timer advertise 5