Displaying And Maintaining Loop Detection; Loop Detection Configuration Example; Network Requirements; Configuration Procedure - H3C S7500E-X Configuration Manual

Displaying and maintaining loop detection

Execute display commands in any view.
Task
Display the loop detection configuration and status.

Loop detection configuration example

Network requirements

As shown in
•
Device A generates a log as a notification.
•
Device A automatically shuts down the port on which a loop is detected.
Figure 35 Network diagram

Configuration procedure

Configure Device A:
1.
# Create VLAN 100, and globally enable loop detection for the VLAN.
<DeviceA> system-view
[DeviceA] vlan 100
[DeviceA-vlan100] quit
[DeviceA] loopback-detection global enable vlan 100
# Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 as trunk ports, and assign them to
VLAN 100.
[DeviceA] interface GigabitEthernet 1/0/1
[DeviceA-GigabitEthernet1/0/1] port link-type trunk
[DeviceA-GigabitEthernet1/0/1] port trunk permit vlan 100
[DeviceA-GigabitEthernet1/0/1] quit
Figure 35, configure loop detection on Device A to meet the following requirements:
Device A
Eth1/1
Device B
VLAN 100
Command
display loopback-detection
Eth1/2
Device C
111