Enabling Link Flapping Protection On An Interface - H3C S7500X Series Interface Configuration Manual

Figure 1 Change rule of the penalty value
Penalty
Not suppressed
Configuration restrictions and guidelines
When you configure dampening on an Ethernet interface, follow these 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.
Configuration procedure
To configure dampening on an Ethernet interface:
Step
1. Enter system view.
2. Enter Ethernet
interface view.
3. Enable dampening on
the interface.

Enabling link flapping protection on an interface

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
between UP and DOWN, traffic switches between active and standby links. To solve this problem,
configure this feature on the interface.
t
0
Command
system-view
interface interface-type
interface-number
dampening [ half-life reuse
suppress max-suppress-time ]
t
1
Suppressed
10
t
2
Not suppressed
Remarks
N/A
N/A
By default, interface dampening is
disabled on Ethernet interfaces.
Ceiling
Suppress limit
Reuse limit
Time