Qtech QSW-8200-28F-AC-DC — команды VRRP: Настройка и управление таймерами [5/36]

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User Manual

Chapter 1. Commands for VRRP 5

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Chapter 1 COMMANDS FOR VRRP

1.1 advertisement-interval

 Commands: advertisement-interval <adver_interval>

 no advertisement-interval

 Function: Sets the vrrp timer values; the “no advertisement-interval” command

restores the default setting.

 Parameters: <adver_interva> is the interval for sending VRRP packets in seconds,

ranging from 1 to 10.

 Default: The default <adver_interva> is 1 second.

 Command mode: VRRP protocol configuration mode

 Usage Guide: The Master in a VRRP Standby cluster will send VRRP packets to member

routers (or L3 Ethernet switch) to announce its properness at a specific interval; this

interval is referred to as adver_interval. If a Backup does not receive the VRRP packets

sent by the Master after a certain period (specified by master_down_interval), then it

assume the Master is no longer operating properly, therefore turns its status to Master.

 The user can use this command to adjust the VRRP packet sending interval of the

Master. For members in the same Standby cluster, this property should be set to a

same value. To Backup, the value of master_down_interval is three times that of

adver_interval. Extraordinary large traffic or timer setting differences between routers

(or L3 Ethernet switches) may result in master_down_interval and invoke instant status

changes. Such situations can be avoided through extending adver_interval interval and

setting longer preemptive delay time.

 Example: Configuring vrrp Timer value to 3

 Switch(Config-Router-Vrrp)# advertisement-interval 3

1.2 circuit-failover

 Commands: circuit-failover {IFNAME | Vlan <ID>} <value_reduced>

 no circuit-failover

 Function: Configures the VRRP monitor interface.

 Parameters: < IFNAME > is the name for the interface to be monitored.

o <value_reduced> stands for the amount of priority decreased, the default value

is 1~253.

 Default: Not configured by default.

 Command mode: VRRP protocol configuration mode

 Usage Guide: The interface monitor function is a valuable extension to backup function,

which not only enable VRRP to provide failover function on router (or L3 Ethernet

switch) fail, but also allow decreasing the priority of a router (or L3 Ethernet switch) to