R0106-HP MSR Router Series Interface Command Reference(V7)

183
NOTE:
• The maximum penalty is equal to 2
(Max-suppress-time/half-life)
× reuse threshold. It is not user configurable.
• The penalty does not increase for up events.
Usage guidelines
The interface dampening feature uses an exponential decay mechanism to suppress the effects of
excessive interface flapping events on routing protocols and routing tables in the network.
If an interface is not dampened, its state changes are reported. For each state change, the system also
generates an SNMP notification and log message.
After a flapping interface is dampened, it does not report its state changes to the CPU. For state change
events, the interface only generates SNMP notifications and log messages. Suppression of interface state
change events protects the system processing resources.
This 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 higher layer
protocols.
Examples
# Configure interface dampening on POS 2/2/0.
<Sysname> system-view
[Sysname] interface pos 2/2/0
[Sysname-Pos2/2/0] dampening 2 800 3000 5
Related commands
• display interface pos
• link-delay
default
Use default to restore the default settings for an interface.
Syntax
default
Views
Standard POS interface view, POS channel interface view
Predefined user roles
network-admin
Usage guidelines
CAUTION:
The default command might interrupt ongoing network services. Make sure you are fully aware of the
impacts of this command when you use it on a live network.
This command might fail to restore the default settings for some commands for reasons such as command
dependencies or system restrictions. You can use the display this command in interface view to check for
these commands, and use their undo forms or follow the command reference to individually restore their
default settings. If your restoration attempt still fails, follow the error message to resolve the problem.