3Com Switch 7750 Series
Command Reference Guide – VRRP & HA Chapter 1 VRRP Configuration Commands
1-10
Parameter
virtual-router-id: VRRP backup group ID ranging form 1 to 255.
Interface-type interface-number: VLAN interface to be tracked.
value-reduced: Value by which the priority is to decrease. This argument ranges from 1
to 255.
Description
Use the vrrp vrid track command to set a VLAN interface/Ethernet port to be tracked.
Use the undo vrrp vrid track command to disable a VLAN interface/Ethernet port from
being tracked.
By default, the value by which the priority of the VLAN interface decreases is 10.
The VLAN interface/Ethernet port tracking function extends the use of the backup
function. With this function enabled, the backup function is provided not only when the
interface where the backup group resides fails, but also when other interfaces/Ethernet
ports are unavailable. By executing the related command you can track an
interface/Ethernet port.
When a tracked VLAN interface/Ethernet port goes down, the priority of the switch
owning the interface/port will reduce automatically by a specified value (the
value-reduced argument). If the switches with their priorities higher than that of the
current master switch exist in the backup group, a new master switch will be then
determined.
Note:
z The Ethernet port tracked can be in or out of the VLAN in whose interface the
backup group resides.
z If a switch is the IP address owner, the VLAN interface/Ethernet port tracking
function can not be enabled for the switch.
z If a tracked VLAN interface/Ethernet port goes down, when it is up again, the priority
of the corresponding switch is automatically restored.
z Each backup group can track up to eight VLAN interfaces/Ethernet ports.
Example
# Configure VLAN 2 interface to track VLAN 1 interface and specify the priority of the
master switch of backup group 1 (on VLAN 2 interface) decreases by 50 when VLAN 1
interface goes down.
<3Com> system-view
System View: return to User View with Ctrl+Z.