Configuring Router Priority, Preemptive Mode, And Tracking Function - HP MSR Series Configuration Manual

Configuring router priority, preemptive mode, and tracking
function
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.
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.
The tracked interface can be a Layer 3 Ethernet interface, a VLAN interface, a
•
synchronous/asynchronous serial interface, a POS interface, an MP-group interface, a dialer
interface, a BRI interface, or an HDLC link bundle interface. The Layer 2 protocol used by the
tracked synchronous/asynchronous serial interfaces can be PPP only, and the tracked
synchronous/asynchronous serial interfaces cannot be added to a virtual template or MP-group; the
dialer interface should function as the PPPoE client and operate in the permanent online mode; the
BRI interface should operate in dedicated line mode.
• 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.
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
1. Enter system view.
2. Enter interface view.
3. Configure router priority in the
VRRP group.
4. Configure the router in the
VRRP group to operate in
preemptive mode and
configure preemption delay.
5. Configure the interface to be
tracked.
Command
system-view
interface interface-type
interface-number
vrrp vrid virtual-router-id priority
priority-value
vrrp vrid virtual-router-id
preempt-mode [ timer delay
delay-value ]
vrrp vrid virtual-router-id track
interface interface-type
interface-number [ reduced
priority-reduced ]
69
Remarks
N/A
N/A
Optional.
The default is 100.
Optional.
The router in the VRRP group
operates in preemptive mode and
the preemption delay is 0 seconds
by default.
Optional.
By default, no interface is being
tracked.