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show im dampening
To display the state of all interfaces on which dampening has been configured, use the
show im dampening
command in EXEC mode.
show im dampening
[
interface type
|
ifhandle handle
]
Syntax Description
(Optional) Interface type. For more information, use the question mark (
?
)
online help function.
interface type
(Optional) Identifies the caps node whose Interface Manager (IM) dampening
information you want to display.
ifhandle handle
Command Default
If you do not specify an interface, then the system displays brief details about all dampened interfaces.
Command Modes
EXEC
Command History
Modification
Release
This command was introduced.
Release 3.7.2
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
If you do not specify an interface, then the system displays brief details about all dampened interfaces.
The physical hardware (layer 1) is not the only part of an interface that can change state. L2 keepalive failure
event is one of the many instances that can have a similar impact on routing protocols despite the underlying
interface state staying UP. To take account of such events, when dampening is configured on an interface, it
is applied independently to every layer. They all use the same parameters as the interface but they have their
own penalty value which is incremented when that layer changes state.
Capsulations that may be dampened in this way include these:
•
L2 basecaps, such as HDLC and PPP, which may flap if keepalives are not received due to events such
as intermittent packet loss.
•
L3 capsulations (for example ipv4, ipv6). These may be brought down if another link has a conflicting
IP address configured.
•
Other locations where negotiation takes place with a peer router, as in the case of PPP control protocols
such as IPCP. If the negotiation fails, then the caps is brought down.
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
512
Global Interface Commandsonthe Cisco ASR 9000 Series Router
show im dampening