Brocade Communications Systems FastIron Administration Manual page 78

Configuring port flap dampening on a trunk
Configuring port flap dampening on a trunk
You can configure the port flap dampening feature on the primary port of a trunk using the link-error-
disable command. Once configured on the primary port, the feature is enabled on all ports that are
members of the trunk. You cannot configure port flap dampening on port members of the trunk.
Enter commands such as the following on the primary port of a trunk.
device(config)# interface ethernet 2/1
device(config-if-e10000-2/1)# link-error-disable 10 3 10
Re-enabling a port disabled by port flap dampening
A port disabled by port flap dampening is automatically re-enabled once the wait period expires;
however, if the wait period is set to zero (0) seconds, you must re-enable the port by entering the
following command on the disabled port.
device(config)# interface ethernet 2/1
device(config-if-e10000-2/1)# no link-error-disable 10 3 10
Displaying ports configured with port flap dampening
Ports that have been disabled due to the port flap dampening feature are identified in the output of the
show link-error-disable command. The following shows an example output.
device# show link-error-disable
Port 2/1 is forced down by link-error-disable.
Use the show link-error-disable all command to display the ports with the port flap dampening
feature enabled.
For FastIron Stackabledevices, the output of the command shows the following.
device# show link-error-disable all
Port8/1 is configured for link-error-disable
Port8/2 is configured for link-error-disable
Port8/3 is configured for link-error-disable
Port8/4 is configured for link-error-disable
Port8/5 is configured for link-error-disable
Port8/9 is configured for link-error-disable
For FastIron X Series devices, the output of the command shows the following.
device# show link-error-disable all
Port
#
-----
11
12
Displaying ports configured with port flap dampening
displayed by the show link-error-disable all command.
78
threshold:1, sampling_period:10, waiting_period:0
threshold:1, sampling_period:10, waiting_period:0
threshold:1, sampling_period:10, waiting_period:0
threshold:1, sampling_period:10, waiting_period:0
threshold:4, sampling_period:10, waiting_period:2
threshold:2, sampling_period:20, waiting_period:0
-----------------Config---------------
Threshold Sampling-Time
--------- -------------
3 120
3 120
------Oper----
Shutoff-Time State Counter
------------ -----
600 Idle
500 Down
defines the port flap dampening statistics
FastIron Ethernet Switch Administration Guide
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N/A
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