Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 38)

8 Multi-Service IronWare Switching Configuration Guide
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Port flap dampening
1
The time parameter is the number of 50-ms units. The default is 0. The valid range is from 0 to
200.
The up parameter means only “up” events are delayed.
The down parameter means that only the down events are delayed.
If neither the up or down parameter is specified, both up and down events are delayed. This is the
default.
Port flap dampening
The port flap dampening feature allows you to configure a wait period before a port, whose link
goes down then up, becomes enabled.
If the port link state toggles (from down to up or from up to down) for a specified number of times
within a specified period, the interface is physically disabled for the specified wait period. Once the
wait period expires, the port’s link state is re-enabled. However, if the wait period is set to zero (0)
seconds, or you want to re-enable the port before the wait period expires, the port must be
manually re-enabled as described in
“Re-enabling a port disabled by port link dampening” .
Configuring port link dampening on an interface
This feature is configured at the interface level.
Brocade(config)#interface ethernet 2/1
Brocade(config-if-e10000-2/1)#link-error-disable 10 3 10
Syntax: [no] link-error-disable toggle-threshold sampling-time-in-sec wait-time-in-sec
The toggle-threshold is the number of times a port’s link state goes from up to down and down to
up before the wait period is activated. The default is 0. Enter a valid value range from 1-50.
The sampling-time-in-sec is the amount of time during which the specified toggle threshold can
occur before the wait period is activated. The default is 0 seconds. Enter a value between 1 and
65565 seconds.
The wait-time-in-sec is the amount of time the port remains disabled (down) before it becomes
enabled. Entering 0 indicates that the port will stay down until an administrative override occurs.
Enter a value between 0 and 65565 seconds.
Configuring port link dampening on a LAG
You can configure the port link dampening feature on the primary port of a LAG at the interface
level using the link-error-disable command. Once configured on the primary port of the LAG, the
feature is enabled on all port that are members of the LAG. You cannot disable the feature from a
member of the LAG.
Enter commands such as the following on the primary port of a LAG.
Brocade(config)#interface ethernet 2/1
Brocade(config-if-e10000-2/1)#link-error-disable 10 3 10