H3C S7500E Series Command Reference

1-31
[Sysname] loopback-detection multi-port-mode enable
[Sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] loopback-detection enable
[Sysname] interface gigabitethernet 2/0/2
[Sysname-GigabitEthernet2/0/2] 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 2/0/1.
<Sysname> system-view
[Sysname] loopback-detection enable
[Sysname] interface gigabitEthernet 2/0/1
[Sysname-GigabitEthernet2/0/1] loopback-detection enable
[Sysname-GigabitEthernet2/0/1] port link-type trunk
[Sysname-GigabitEthernet2/0/1] loopback-detection per-vlan enable
mdi
Syntax
mdi { across | auto | normal }
undo mdi
View
Ethernet interface view
Default Level
2: System level
Parameters
across: Sets the MDI mode to across. In this mode, pins 1 and 2 of the port are receive pins, and pins
3 and 6 are transmit pins.

H3C S7500E Series Specifications

General

Brand	H3C
Model	S7500E Series
Category	Switch
Language	English