Configuring Router Priority, Preemption Mode And Tracking Function - 3Com MSR 50 Series Configuration Manual

1982 C 107: VRRP C
HAPTER
Configuring Router
Priority, Preemption
Mode and Tracking
Function
c
ONFIGURATION
segment that the interface IP address belongs to, the state of the standby
group is always initialize though you can perform the configuration
successfully, that is, VRRP does not take effect in this case.
Configuration prerequisites
Before you configure these features, you should first create a standby group on
the interface and configure virtual IP address for it.
Configuration procedure
By configuring router priority, preemption mode, interface tracking, or a Track
object, you can decide which router in the standby group serves as the Master.
Follow these steps to configure router priority, preemption mode and the Track
object tracking function:
To do...
Enter system view
Enter interface view
Configure router priority in
the standby group
Configure the router in the
standby group to work in
preemption mode and
configure preemption delay
Configure the interface to be
tracked
Configure VRRP to track a
specified Track object
CAUTION:
The priority of an IP address owner is always 255 and not configurable.
■
Do not configure VRRP tracking of an interface or an object on an IP address
■
owner.
The tracked interface can be a Layer 3 Ethernet interface, a VLAN interface, a
■
synchronous/asynchronous serial interface, an MP-group interface, a dialer
interface, and a BRI interface. At present, the Layer 2 protocol used by the
tracked synchronous/asynchronous serial interfaces should only be PPP
protocol; the dialer interface should function as the PPPoE client and operate in
the permanent online mode; and the BRI interface should work in the
dedicated line mode.
Use the 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 ]
vrrp vrid virtual-router-id
track track-entry-number
[ reduced priority-reduced ]
Remarks
-
-
Optional
100 by default.
Optional
The router in the standby
group works in preemption
mode and the preemption
delay is 0 seconds by default.
If the router in the standby
group works in non
preemption mode, the
preemption delay changes to
zero seconds automatically.
Optional
No interface is being tracked
by default.
Optional
Not configured by default.