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54 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuring basic port parameters
2
The above command will cause the Dell PowerConnect device to automatically re-enable ports that
were disabled because of a loop detection. By default, the device will wait 300 seconds before
re-enabling the ports. You can optionally change this interval to a value from 10 to 65535
seconds. Refer to “Specifying the recovery time interval” on page 54.
Syntax: [no] errdisable recovery cause loop-detection
Use the [no] form of the command to disable this feature.
Specifying the recovery time interval
The recovery time interval specifies the number of seconds the Dell PowerConnect device will wait
before automatically re-enabling ports that were disabled because of a loop detection. (Refer to
“Configuring the device to automatically re-enable ports” on page 53.) By default, the device will
wait 300 seconds. To change the recovery time interval, enter a command such as the following.
PowerConnect(config)# errdisable recovery interval 120
The above command configures the device to wait 120 seconds (2 minutes) before re-enabling the
ports.
To revert back to the default recovery time interval of 300 seconds (5 minutes), enter one of the
following commands.
PowerConnect(config)# errdisable recovery interval 300
OR
PowerConnect(config)# no errdisable recovery interval 120
Syntax: [no] errdisable recovery interval <seconds>
where <seconds> is a number from 10 to 65535.
Clearing loop-detection
To clear loop detection statistics and re-enable all ports that are in Err-Disable state because of a
loop detection, enter the following command.
PowerConnect# clear loop-detection
Displaying loop-detection information
Use the show loop-detection status command to display loop detection status, as shown.
PowerConnect# show loop-detection status
loop detection packets interval: 10 (unit 0.1 sec)
Number of err-disabled ports: 3
You can re-enable err-disable ports one by one by "disable" then "enable"
under interface config, re-enable all by "clear loop-detect", or
configure "errdisable recovery cause loop-detection" for automatic recovery
index port/vlan status #errdis sent-pkts recv-pkts
1 1/13 untag, LEARNING 0 0 0
2 1/15 untag, BLOCKING 0 0 0
3 1/17 untag, DISABLED 0 0 0
4 1/18 ERR-DISABLE by itself 1 6 1
5 1/19 ERR-DISABLE by vlan 12 0 0 0
6 vlan12 2 ERR-DISABLE ports 2 24 2