12
Figure 1 Change rule of the penalty value
Configuration restrictions and guidelines
When you configure dampening on an Ethernet interface, follow these restrictions and guidelines:
• The dampening command and the link-delay command cannot be configured together 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 Command Remarks
1. Enter system view.
system-view
N/A
2. Enter Ethernet
interface view.
interface
interface-type
interface-number
N/A
3. Enable dampening on
the interface.
dampening
[ half-life reuse
suppress max-suppress-time ]
By default, interface dampening is
disabled on Ethernet interfaces.
Enabling loopback testing on an Ethernet interface
CAUTION:
After you enable this feature on an Ethernet interface, the interface does not forward data traffic.
Not suppressed Not suppressedSuppressed
Penalty
Time
Reuse limit
Suppress limit
Ceiling
t
0 t1 t2
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