Loopback-Detection Global Action - H3C S6812 Series Command Reference Manual

Use undo loopback-detection enable to disable loop detection on a port.
Syntax
loopback-detection enable vlan { vlan-id-list | all }
undo loopback-detection enable vlan { vlan-id-list | all }
Default
Loop detection is disabled on ports.
Views
Layer 2 Ethernet interface view
Layer 2 aggregate interface view
Predefined user roles
network-admin
Parameters
vlan-id-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN ID
or a range of VLAN IDs in the form of vlan-id1 to vlan-id2. The value range for VLAN IDs is 1 to 4094.
The ID for vlan-id2 must be no less than the ID for vlan-id1.
all: Specifies all existing VLANs.
Usage guidelines
You can enable loop detection globally or on a per-port basis. When a port receives a detection
frame in a VLAN, the loop protection action is triggered on that port, regardless of whether loop
detection is enabled on it.
Example
# Enable loop detection on Ten-GigabitEthernet 1/0/1 for VLAN 10 through VLAN 20.
<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[System-Ten-GigabitEthernet1/0/1] 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 set 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
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