H3C Technologies H3C S6800 Series Switches - Manual (Page 35)

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Configuration guidelines
The running priority of an IP address owner is always 255, and you do not need to configure it. An IP
address owner always operates in preemptive mode.
Configuration procedure
To configure the router priority and preemptive mode:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the priority of the
router in the VRRP group. vrrp vrid virtual-router-id priority
priority-value
The default setting is 100.
4. Enable the preemptive mode
for the router in a VRRP group
and configure the preemption
delay time.
vrrp vrid virtual-router-id
preempt-mode [ delay
delay-value ]
By default, the router in a VRRP
group operates in preemptive
mode and the preemption delay
time is 0 seconds, which means an
immediate preemption.
Configuring IPv4 VRRP packet attributes
Configuration guidelines
• You can configure different authentication modes and authentication keys for VRRP groups on an
interface. However, members of the same VRRP group must use the same authentication mode and
authentication key.
• In VRRPv3, authentication mode and authentication key settings do not take effect.
• In VRRPv2, all routers in a VRRP group must have the same VRRP advertisement interval.
• In VRRPv3, routers in an IPv4 VRRP group can have different intervals for sending VRRP
advertisements. The master in the VRRP group sends VRRP advertisements at specified intervals, and
carries the interval in the advertisements. After a backup receives the advertisement, it records the
interval in the advertisement. If the backup does not receive a new VRRP advertisement from the
master when the timer (3 x recorded interval + Skew_Time) expires, it regards the master as failed
and takes over as the new master.
Configuration procedure
To configure VRRP packet attributes:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the authentication
mode and authentication key
for an IPv4 VRRP group to
send and receive VRRP
packets.
vrrp vrid virtual-router-id
authentication-mode { md5 |
simple } { cipher | plain } key
By default, authentication is
disabled.