Verifying The Configuration - HP FlexFabric 12900 Series Configuration Manual

Layer 2-lan switching
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# Configure Ten-GigabitEthernet 1/0/1 and Ten-GigabitEthernet 1/0/2 as trunk ports, and
assign them to VLAN 100.
[DeviceB] interface ten-gigabitethernet 1/0/1
[DeviceB-Ten-GigabitEthernet1/0/1] port link-type trunk
[DeviceB-Ten-GigabitEthernet1/0/1] port trunk permit vlan 100
[DeviceB-Ten-GigabitEthernet1/0/1] quit
[DeviceB] interface ten-gigabitethernet 1/0/2
[DeviceB-Ten-GigabitEthernet1/0/2] port link-type trunk
[DeviceB-Ten-GigabitEthernet1/0/2] port trunk permit vlan 100
[DeviceB-Ten-GigabitEthernet1/0/2] quit
3.
Configure Device C:
# Create VLAN 100.
<DeviceC> system-view
[DeviceC] vlan 100
[DeviceC–vlan100] quit
# Configure Ten-GigabitEthernet 1/0/1 and Ten-GigabitEthernet 1/0/2 as trunk ports, and
assign them to VLAN 100.
[DeviceC] interface ten-gigabitethernet 1/0/1
[DeviceC-Ten-GigabitEthernet1/0/1] port link-type trunk
[DeviceC-Ten-GigabitEthernet1/0/1] port trunk permit vlan 100
[DeviceC-Ten-GigabitEthernet1/0/1] quit
[DeviceC] interface ten-gigabitethernet 1/0/2
[DeviceC-Ten-GigabitEthernet1/0/2] port link-type trunk
[DeviceC-Ten-GigabitEthernet1/0/2] port trunk permit vlan 100
[DeviceC-Ten-GigabitEthernet1/0/2] quit

Verifying the configuration

# View the system logs on devices, for example, Device A.
[DeviceA]
%Feb 24 15:04:29:663 2011 DeviceA LPDT/4/LOOPED:Slot=1;
Loopback exists on Ten-GigabitEthernet1/0/1.
%Feb 24 15:04:29:667 2011 DeviceA LPDT/4/LOOPED:Slot=1;
Loopback exists on Ten-GigabitEthernet1/0/2.
%Feb 24 15:04:44:243 2011 DeviceA LPDT/4/RECOVERED:Slot=1;
Loopback on Ten-GigabitEthernet1/0/1 recovered.
%Feb 24 15:04:44:248 2011 DeviceA LPDT/4/RECOVERED:Slot=1;
Loopback on Ten-GigabitEthernet1/0/2 recovered.
The output shows the following information:
Device A detects loops on ports Ten-GigabitEthernet 1/0/1 and Ten-GigabitEthernet 1/0/2 within
a loop detection interval.
Device A automatically shuts down the ports and generates log messages.
# 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.
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