Loopback-Detection Enable - HP 5900 series Command Reference Manual

Syntax
In Ethernet interface view:
loopback-detection action { block | no-learning | shutdown }
undo loopback-detection action
In aggregate interface view:
loopback-detection action shutdown
undo loopback-detection action
Default
When the device detects a loop on a port, it generates a log but performs no action on the port.
Views
Ethernet interface view, aggregate interface view
Predefined user roles
network-admin
Parameters
block: Enables the block mode If a loop is detected, the device disables MAC address learning and
blocks inbound traffic on the port, in addition to generating a log. Aggregate interfaces do not support
this keyword.
no-learning: Enables the no-learning mode. If a loop is detected, the device generates a log and
disables MAC address learning on the port. Aggregate interfaces do not support this keyword.
shutdown: Enables the shutdown mode. If a loop is detected, the device generates a log and shuts down
the port.
Usage guidelines
You can configure the loop protection action globally or on specific ports. The global configuration
applies to all ports. The per-port configuration applies to the individual ports. The per-port configuration
takes precedence over the global configuration.
Example
# Set the loop protection action to shutdown on port Ten-GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[System-Ten-GigabitEthernet1/0/1] loopback-detection action shutdown
Related commands
display loopback-detection
•
loopback-detection global action
•

loopback-detection enable

Use loopback-detection enable to enable loop detection on a port.
Use undo loopback-detection enable to disable loop detection on a port.
Syntax
loopback-detection enable vlan { vlan-list | all }
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