H3C Technologies H3C SecPath F1000-E - Manual (Page 17)

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NOTE:
•
When VRRP works in load balancing mode, the virtual IP address of a VRRP group cannot be the same
as the IP address of any interface in the VRRP group. In other words, in load balancing mode, the VRRP
group does not have an IP address owner.
• A VRRP group is removed after you remove all the virtual IP addresses configured for it. In addition,
configurations on that VRRP group do not take effect any longer.
• The virtual IP address of a VRRP group can be either an unused IP address on the segment where the
VRRP group resides or the IP address of an interface on a router in the VRRP group. In the latter case, the
router is called the IP address owner.
• Removal of the VRRP group on the IP address owner causes IP address collision. To solve the collision, it
is recommended to modify the IP address of the interface on the IP address owner.
• The virtual IP address of a VRRP group cannot be 0.0.0.0, 255.255.255.255, loopback addresses, non
class A/B/C addresses or other illegal IP addresses such as 0.0.0.1.
• A VRRP group operates normally only when the configured virtual IP address and the interface IP
address belong to the same segment and are legal host addresses. If the configured virtual IP address
and the interface IP address do not belong to the same network segment, or the configured IP address
is the network address or network broadcast address of the network segment to which the interface IP
address belongs, the state of the VRRP group is always initialize though you can perform the
configuration successfully. In this case, VRRP does not take effect.
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.
Follow these steps to configure router priority, preemptive mode and the tracking function:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure router priority in the
VRRP group vrrp vrid virtual-router-id
priority priority-value Optional
100 by default.
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.