Loopback-Detection Per-Vlan Enable - H3C S5120-SI Series Command Reference Manual

NOTE:
To enable multi-port loopback detection, you must configure the loopback-detection multi-port-mode
•
enable and loopback-detection enable commands in system view, and the loopback-detection enable
command in the view of the related interfaces.
The single-port loopback detection function is available when the switch is performing multi-port
•
loopback detection.
Examples
# Enable multi-port loopback detection to monitor loops between GigabitEthernet1/0/1 and
GigabitEthernet1/0/2.
<Sysname> system-view
[Sysname] loopback-detection enable
[Sysname] loopback-detection multi-port-mode enable
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] loopback-detection enable
[Sysname] interface gigabitethernet 1/0/2
[Sysname-GigabitEthernet1/0/2] loopback-detection enable

loopback-detection per-vlan enable

Syntax
loopback-detection per-vlan enable
undo loopback-detection per-vlan enable
View
Ethernet interface view, port group view
Default level
2: System level
Parameters
None
Description
Use the loopback-detection per-vlan enable command to enable loopback detection in each VLAN on
trunk or hybrid ports.
Use the undo loopback-detection per-vlan enable command to disable loopback detection in all but the
default VLAN on trunk or hybrid ports.
By default, a trunk port or hybrid port performs loopback detection only in its default VLAN.
The loopback-detection per-vlan enable command is not applicable to access ports.
Examples
# Enable loopback detection in all VLANs on hybrid port GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] loopback-detection enable
[Sysname] interface gigabitEthernet 1/0/1
[Sysname-GigabitEthernet1/0/1] loopback-detection enable
[Sysname-GigabitEthernet1/0/1] port link-type trunk
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