Loop Protection - HP 1810-24G Management And Configuration Manual

Table 20 Get Connected Fields (continued)
Field
Cable Length Detect
LED Intensity
Intensity Level
Start Time
Duration
Recur Daily
Click Apply to save any changes for the current boot session; the changes take effect immediately.

Loop Protection

Loops in a network can consume switch resources and degrade performance. Detecting loops
manually can be very cumbersome and time consuming. The HP 1810 series switch software
provides an automatic Loop Protection feature.
Loop Protection may be enabled or disabled globally and on a port-by-port basis. When enabled
globally, the software sends loop protection packets to a reserved layer 2 multicast destination
address on all the ports on which the feature is enabled. Transmission of the packet can be disabled
selectively on certain ports, even when Loop Protection is enabled.
If this multicast packet comes back to the switch with any of the ports' MAC addresses as the
source, the switch determines that a loop has occurred. The port that received the loop protection
packet from the switch can be shut down for a configured period, or a log entry can be made.
Ports on which Loop Protection is disabled drop the loop protection packets silently.
To display the Loop Protection configuration page, click Switching > Loop Protection in the navigation
pane.
Description
Cable Energy Saving Configuration
Enable port power consumption based upon the cable length such that shorter
cables use less power. This feature is disabled by default.
LED intensity Configuration
Enable LED intensity control globally on all ports.
Sets the desired LED intensity level. Valid values are High, Medium, Low, and
Off. Default value is Off.
Specifies the time of day when the configured LED intensity level is activated.
Valid values are any hour or half-hour from midnight (12:00 AM) through
1 1:30 PM. Default value is 7:00 PM.
Specifies the number of hours the configured LED Intensity level is in effect.
Valid values are in the range of 1 hour to 24 hours. Default value is 12 hours.
Specifies whether the LED intensity settings are in effect one time only, or daily.
Set to Yes to repeat the configured LED Intensity level daily. Valid values are
Yes and No. Default value is Yes.
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