Accton Technology ES4710BD manual Advertisement-interval, Circuit-failover

ES4710BD 10 Slots L2/L3/L4 Chassis Switch

Switch(Config-Router-Vrrp)# priority 150

21.1.2.10advertisement-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 1second.

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

21.1.2.11circuit-failover

Commands: circuit-failover <ifname> <value_reduced> no circuit-failover

Function: Configures the vrrp monitor interface

Parameters: < ifname > is the name for the interface to be monitored

<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 ensure smooth implementation of backup function when status of that network interface is down.

When this command is used, if the status of an interface monitored turns from up to down, then the priority of that very router (or L3 Ethernet switch) in its Standby cluster will decrease, lest

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