H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 47)

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Associating track with interface management
The interface management module monitors the physical status or network-layer protocol status of the
interface. After being associated with a track entry, when the physical or network-layer protocol status of
the interface changes to up, the interface management module informs the track module of the change
and the track module sets the track entry to Positive. When the physical or network-layer protocol status
of the interface changes to down, the interface management module informs the track module of the
change and the track module sets the track entry to Negative.
To associate track with interface management:
Step Command Remarks
1. Enter system view. system-view N/A
2. Associate track with interface
management.
• 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
associated application module 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
associated application module 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 } * ]
Use either approach.
No track entry exists by
default.
Associating the track module with an application
module
Associating track with VRRP
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 guarantee 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.