Loopback-Detection Global Action - HP 12500 Series Command Reference Manual

Parameters
vlan-list: Specifies a VLAN list, in the format of { vlan-id [ to vlan-id ] }&<1-10>, where vlan-id
represents the VLAN ID in the range of 1 to 4094, and &<1-10> indicates that you can specify up
to 10 vlan-id [ to vlan-id ] parameters.
all: Specifies all existing VLANs.
Usage guidelines
You can enable loop detection globally or on specific ports. The global configuration applies to all
ports in the specified VLAN. The per-port configuration applies to the individual port only when the
port belongs to the specified VLAN.
Example
# Enable loop detection on port GigabitEthernet 3/0/1 for VLAN 10 through VLAN 20.
<Sysname> system-view
[Sysname] interface GigabitEthernet 3/0/1
[System-GigabitEthernet3/0/1] loopback-detection enable vlan 10 to 20
Related commands
display loopback-detection
•
loopback-detection global enable
•

loopback-detection global action

Use loopback-detection global action to configure the global loop protection action.
Use undo loopback-detection global action to restore the default.
Syntax
loopback-detection global action shutdown
undo loopback-detection global action
Default
When the device detects a loop on a port, it generates a log but performs no action on the port.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
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.
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