H3C Technologies H3C SecBlade LB Cards - Manual (Page 100)

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a higher priority router in the VRRP group to become the master, and maintains proper
communication between the hosts in the LAN and the external network.
• Monitor the master on a backup. If a fault occurs on the master, the backup working in switchover
mode will switch to the master immediately to maintain normal communication.
When VRRP is operating in load balancing mode, associate the Track module with the VRRP Virtual
Forwarder (VF) to implement the following functions:
• Change the priority of the active VF (AVF) according to its uplink state. When the uplink of the AVF
fails, the track entry changes to Negative state and the weight of the AVF decreases by a specified
value so that the VF with a higher priority becomes the new AVF to forward packets.
• Monitor the AVF status from the listening VF (LVF), which refers to the VF in listening state. When the
AVF fails, the LVF that is operating in switchover mode becomes the new AVF to ensure continuous
forwarding.
Follow these guidelines when you associate Track with VRRP:
• VRRP tracking is not valid on an IP address owner. An IP address owner refers to a router when the
IP address of the virtual router is the IP address of an interface on the router in the VRRP group.
• When the status of the track entry changes from Negative to Positive or Invalid, the associated
router or VF restores its priority automatically.
• You can associate a nonexistent track entry with a VRRP group or VF. The association takes effect
only after you use the track command to create the track entry. For more information about VRRP,
see "Configuring VRRP."
To associate Track with VRRP group:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Create a VRRP group
and configure its virtual
IP address.
vrrp vrid virtual-router-id virtual-ip
virtual-address
No VRRP group is created by default.
4. Associate a track entry
with a VRRP group.
vrrp [ ipv6 ] vrid virtual-router-id
track track-entry-number [ reduced
priority-reduced | switchover ]
No track entry is specified for a VRRP
group by default.
This command is supported when VRRP is
operating in both standard protocol
mode and load balancing mode.
To associate Track with VRRP VF:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Create a VRRP group
and configure its virtual
IP address.
vrrp vrid virtual-router-id virtual-ip
virtual-address No VRRP group is created by
default.