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21.3 Commands For VRRP
21.3.1 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 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
21.3.2 circuit-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.
