R0106-HP MSR Router Series Layer 2 - LAN Switching Configuration Guide(V7)

# Configure the global loop protection action as shutdown.

[RouterA] loopback-detection global action shutdown

# Set the loop detection interval to 35 seconds.

[RouterA] loopback-detection interval-time 35

2. Configure Router B:

# Create VLAN 100.

<RouterB> system-view

[RouterB] vlan 100

[RouterB–vlan100] quit

# Configure GigabitEthernet 2/1/1 and GigabitEthernet 2/1/2 as trunk ports, and assign them

to VLAN 100.

[RouterB] interface GigabitEthernet 2/1/1

[RouterB-GigabitEthernet2/1/1] port link-type trunk

[RouterB-GigabitEthernet2/1/1] port trunk permit vlan 100

[RouterB-GigabitEthernet2/1/1] quit

[RouterB] interface gigabitethernet 2/1/2

[RouterB-GigabitEthernet2/1/2] port link-type trunk

[RouterB-GigabitEthernet2/1/2] port trunk permit vlan 100

[RouterB-GigabitEthernet2/1/2] quit

3. Configure Router C:

# Create VLAN 100.

<RouterC> system-view

[RouterC] vlan 100

[RouterC–vlan100] quit

# Configure GigabitEthernet 2/1/1 and GigabitEthernet 2/1/2 as trunk ports, and assign them

to VLAN 100.

[RouterC] interface GigabitEthernet 2/1/1

[RouterC-GigabitEthernet2/1/1] port link-type trunk

[RouterC-GigabitEthernet2/1/1] port trunk permit vlan 100

[RouterC-GigabitEthernet2/1/1] quit

[RouterC] interface gigabitethernet 2/1/2

[RouterC-GigabitEthernet2/1/2] port link-type trunk

[RouterC-GigabitEthernet2/1/2] port trunk permit vlan 100

[RouterC-GigabitEthernet2/1/2] quit

Verifying the configuration

# View the system logs on routers, for example, Router A.

[RouterA]

%Feb 24 15:04:29:663 2013 RouterA LPDT/4/LPDT LOOPED: Loopback exists on

GigabitEthernet2/1/1.

%Feb 24 15:04:29:667 2013 RouterA LPDT/4/LPDT LOOPED: Loopback exists on

GigabitEthernet2/1/2.

%Feb 24 15:04:44:243 2013 RouterA LPDT/5/LPDT RECOVERED: Loopback on GigabitEthernet2/1/1

recovered.

%Feb 24 15:04:44:248 2013 RouterA LPDT/5/LPDT RECOVERED: Loopback on GigabitEthernet2/1/2

recovered.