H3C S7500X Series Configuration Manual page 216

[DeviceB-GigabitEthernet1/0/1] port link-type trunk
[DeviceB-GigabitEthernet1/0/1] port trunk permit vlan 100
[DeviceB-GigabitEthernet1/0/1] quit
[DeviceB] interface gigabitethernet 1/0/2
[DeviceB-GigabitEthernet1/0/2] port link-type trunk
[DeviceB-GigabitEthernet1/0/2] port trunk permit vlan 100
[DeviceB-GigabitEthernet1/0/2] quit
3. Configure Device C:
# Create VLAN 100.
<DeviceC> system-view
[DeviceC] vlan 100
[DeviceC–vlan100] quit
# Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 as trunk ports, and assign them to
VLAN 100.
[DeviceC] interface gigabitethernet 1/0/1
[DeviceC-GigabitEthernet1/0/1] port link-type trunk
[DeviceC-GigabitEthernet1/0/1] port trunk permit vlan 100
[DeviceC-GigabitEthernet1/0/1] quit
[DeviceC] interface gigabitethernet 1/0/2
[DeviceC-GigabitEthernet1/0/2] port link-type trunk
[DeviceC-GigabitEthernet1/0/2] port trunk permit vlan 100
[DeviceC-GigabitEthernet1/0/2] quit
Verifying the configuration
# View the system logs on devices, for example, Device A.
[DeviceA]
%Feb 24
GigabitEthernet1/0/1.
%Feb 24
GigabitEthernet1/0/2.
%Feb 24 15:04:44:243 2013 DeviceA LPDT/5/LPDT RECOVERED: Loopback on GigabitEthernet1/0/1
recovered.
%Feb 24 15:04:44:248 2013 DeviceA LPDT/5/LPDT RECOVERED: Loopback on GigabitEthernet1/0/2
recovered.
The output shows the following information:
•
Device A detected loops on GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 within a loop
detection interval.
•
Loops on GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 were removed.
# Use the display loopback-detection command to display the loop detection configuration and
status on devices, for example, Device A.
[DeviceA] display loopback-detection
Loop detection is enabled.
Loop detection interval is 35 second(s).
Loopback is detected on following interfaces:
Interface
GigabitEthernet1/0/1
GigabitEthernet1/0/2
15:04:29:663 2013
15:04:29:667 2013
DeviceA LPDT/4/LPDT
DeviceA LPDT/4/LPDT
Action mode VLANs
Shutdown 100
Shutdown 100
7
LOOPED: Loopback
LOOPED: Loopback
exists on
exists on