H3C S7500 Series Ethernet Switches Command Manual

Command Manual – VRRP-HA
H3C S7500 Series Ethernet Switches Chapter 1
VRRP Configuration Commands
1-6
Use the undo vrrp ping-enable command to revert to the default.
By default, a backup group does not respond to ping operations destined for its virtual
router IP address.
As these two commands are invalid to switches in backup groups, use them before you
create a backup group.
Examples
# Enable a backup group to respond to ping operations destined for its virtual router IP
address.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] vrrp ping-enable
1.1.6 vrrp vrid preempt-mode
Syntax
vrrp vrid virtual-router-id preempt-mode [ timer delay delay-value ]
undo vrrp vrid virtual-router-id preempt-mode
View
VLAN interface view
Parameters
virtual-router-id: VRRP backup group ID, ranging from 1 to 255.
delay-value: Delay period (in seconds), ranging from 0 to 255.
Description
Use the vrrp vrid preempt-mode command to configure a switch to operate in the
preemptive mode and set the delay period.
Use the undo vrrp vrid preempt-mode command to cancel the configuration.
By default, switches in a backup group operate in the preemptive mode, with the delay
period set to 0 seconds.
If you want backup switches to preempt the master switch, configure them to operate in
the preemptive mode. You can also set the delay period for preemption as needed.
As long as a switch in the backup group becomes the master switch, other switches,
even if they are configured with a higher priority later, do not preempt the master switch
unless they operate in preemptive mode. The switch operating in preemptive mode will
become the master switch when it finds its priority is higher than that of the current
master switch, and the former master switch becomes a backup switch accordingly.