Loop Protection - HP ProCurve 1810G Management And Configuration Manual

Switching Pages

Loop Protection

Loop Protection
Loops in a network can consume switch resources and degrade performance. Detecting loops manually
can be very cumbersome and time consuming. ProCurve 1810G 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 configure Loop Protection, click Switching > Loop Protection in the navigation pane.
Figure 4-6. Loop Protection
4-6