Enabling Link Flapping Protection On An Interface - H3C S6850 Series Configuration Manual

•
The ceiling is lower than or equal to the maximum suppress limit supported.
Figure 1 shows the change rule of the penalty value. The lines t
end time of the suppression, respectively. The period from t
to t indicates the max-suppress-time, and t
1
Figure 1 Change rule of the penalty value
Penalty
Not suppressed
Restrictions and guidelines
•
The dampening , link-delay , and port link-flap protect enable commands are
mutually exclusive on an interface.
•
The dampening command does not take effect on the administratively down events. When
you execute the shutdown command, the penalty restores to 0, and the interface reports the
down event to the upper-layer protocols.
•
Do not enable the dampening feature on an interface with RRPP, MSTP, or Smart Link enabled.
Procedure
1. Enter system view.
system-view
2. Enter Ethernet interface view.
interface interface-type interface-number
3. Enable dampening on the interface.
dampening [ half-life reuse suppress max-suppress-time ]
By default, interface dampening is disabled on Ethernet interfaces.

Enabling link flapping protection on an interface

About link flapping protection
Link flapping on an interface changes network topology and increases the system overhead. For
example, in an active/standby link scenario, when interface status on the active link changes
t
0
0
to t indicates the complete decay period.
1 2
t
1
Suppressed
12
and t indicate the start time and
0 2
to t indicates the suppression period, t
2
t
2
Not suppressed
0
Ceiling
Suppress limit
Reuse limit
Time