H3C Technologies H3C SecPath F1000-E - Manual (Page 288)

5
To do… Use the command… Remarks
Create a track entry, associate it
with the interface management
module to monitor the physical
status of an interface, and specify
the delay time for the track module
to notify the application modules
when the track entry status
changes
track track-entry-number interface
interface-type interface-number [ delay
{ negative negative-time | positive
positive-time } * ]
Create a track entry, associate it
with the interface management
module to monitor the Layer 3
protocol status of an interface, and
specify the delay time for the track
module to notify the application
modules when the track entry status
changes
track track-entry-number interface
interface-type interface-number protocol
{ ipv4 | ipv6 } [ delay { negative
negative-time | positive positive-time }
* ]
Required
Use either approach
No track entry is created by
default.
Configuring Collaboration Between the Track
Module and the Application Modules
Configuring Track-VRRP Collaboration
VRRP is an error-tolerant protocol. It adds a group of routers that can act as network gateways to a VRRP
group, which forms a virtual router. Routers in the VRRP group elect the master acting as the gateway
according to their priorities. A router with a higher priority is more likely to become the master. The other
routers function as the backups. When the master fails, to ensure that the hosts in the network segment
can uninterruptedly communicate with external networks, the backups in the VRRP group elect a new
gateway to undertake the responsibility of the failed master.
When VRRP works in standard protocol mode or load balancing mode, through the track-VRRP
collaboration, you can:
• Change the priority of a router according to the status of the uplink. If there is a fault on the uplink
of the router, the VRRP group cannot be aware of the uplink failure. If the router is the master, hosts
in the LAN cannot access the external network. This problem can be solved with the track-VRRP
collaboration function. Use the detection modules to monitor the status of the uplink of the router
and establish the collaborations between the detection modules, track module and VRRP. When
the uplink fails, the detection modules notify the track module to change the status of the monitored
track entry to Negative, and the priority of the master thus decreases by a specified value, allowing
a higher priority router in the VRRP group to become the master to maintain proper communication
between the hosts in the LAN and the external network.
• Monitor the master on a backup. If there is a fault on the master, the backup working in the
switchover mode will switch to the master immediately to maintain normal communication.