6.8
Loop Protection
Loop protection is similar to STP, but it lacks an IEEE standard and is a private protocol. Loop
protection is easy to configure and use. It is suitable for a simple ring topology and common network
services, and has obvious advantages in line backup.
The loop protection configuration page consists of three parts: global configuration, port enable, and Tx
mode.
Global configuration-Enable Loop Protection
: The default value is
Disable
.
Disable
indicates
that loop protection is disabled globally; and
Enable
indicates that loop protection is enabled
globally.
Global configuration-Transmission Time
: The default value is 300ms.
Port
: Indicates the port number.
Enable
: If this check box is selected, loop protection is enabled on a port.
Tx mode
: The default value is
Disable
.
Disable
indicates that the Tx mode is disabled; and
Enable
indicates that the Tx mode is enabled. After the Tx mode is enabled, the port can
periodically send loop detection packets to test whether any loop exists on the network.
Tip: STP, ERPS, and loop protection cannot be enabled at the same time. Global and port-based loop
protection must be enabled on all ports that form the ring, and the Tx mode must be enabled on at least
one port.
Configuration example:
