H3C Technologies H3C SR8800 - Manual (Page 67)

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Configuring router priority, preemptive mode and tracking
function
Configuration prerequisites
Before you configure router priority, preemptive mode and tracking function, create a VRRP group on an
interface and configure a virtual IP address for it.
Configuration procedure
By configuring router priority, preemptive mode, interface tracking, or a track entry, you can determine
which router in the VRRP group serves as the master.
To configure router priority, preemptive mode and the tracking function:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure router priority in the
VRRP group.
vrrp vrid virtual-router-id priority
priority-value Optional.
100 by default.
4. Configure the router in the
VRRP group to work in
preemptive mode and
configure preemption delay.
vrrp vrid virtual-router-id
preempt-mode [ timer delay
delay-value ]
Optional.
The router in the VRRP group works
in preemptive mode and the
preemption delay is 0 seconds by
default.
5. Configure the interface to be
tracked.
vrrp vrid virtual-router-id track
interface interface-type
interface-number [ reduced
priority-reduced ]
Optional.
No interface is being tracked by
default.
6. Configure VRRP to track a
specified track entry.
vrrp vrid virtual-router-id track
track-entry-number [ reduced
priority-reduced | switchover ]
Optional.
Not configured by default.
NOTE:
•
The running priority of an IP address owner is always 255 and you do not need to configure it. An IP
address owner always works in preemptive mode.
• If you configure an interface to be tracked or a track entry to be monitored on a router that is the IP
address owner in a VRRP group, the configuration does not take effect. If the router is not the IP address
owner in the VRRP group later, the configuration takes effect.
• Do not configure VRRP tracking for an interface or a track entry on an IP address owner.
• The tracked interface can be a Layer 3 Ethernet interface, a VLAN interface, a Layer 3 aggregate
interface, a POS interface, an MP-group interface, an HDLC link bundle interface, or an RPR logical
interface.
• If the state of a tracked interface changes from down or removed to up, the priority of the router where
the interface resides is automatically restored.
• If the state of a track entry changes from negative or invalid to positive, the priority of the router where
the track entry is configured is automatically restored.