CDP-compatible LLDP configuration example

As shown in Figure 82, Ten-GigabitEthernet 1/0/1 and Ten-GigabitEthernet 1/0/2 of Switch A are each connected to a Cisco IP phone, which sends VLAN-tagged voice traffic.

Configure voice VLAN 2 on Switch A. Enable CDP compatibility of LLDP on Switch A to allow the Cisco IP phones to automatically configure the voice VLAN. The voice VLAN feature performs the following actions:

• Confines the voice traffic to the voice VLAN.

• Isolates the voice traffic from other types of traffic.

1. Configure a voice VLAN on Switch A:

   # Create VLAN 2.

   <SwitchA> system-view
   [SwitchA] vlan 2
   [SwitchA-vlan2] quit
   

   # Set the link type of Ten-GigabitEthernet 1/0/1 and Ten-GigabitEthernet 1/0/2 to trunk, and enable voice VLAN on them.

   [SwitchA] interface ten-gigabitethernet 1/0/1
   [SwitchA-Ten-GigabitEthernet1/0/1] port link-type trunk
   [SwitchA-Ten-GigabitEthernet1/0/1] voice-vlan 2 enable
   [SwitchA-Ten-GigabitEthernet1/0/1] quit
   [SwitchA] interface ten-gigabitethernet 1/0/2
   [SwitchA-Ten-GigabitEthernet1/0/2] port link-type trunk
   [SwitchA-Ten-GigabitEthernet1/0/2] voice-vlan 2 enable
   [SwitchA-Ten-GigabitEthernet1/0/2] quit
   

2. Configure CDP-compatible LLDP on Switch A:

   # Enable LLDP globally, and enable CDP compatibility globally.

   [SwitchA] lldp global enable 
   [SwitchA] lldp compliance cdp
   

   # Enable LLDP on Ten-GigabitEthernet 1/0/1. By default, LLDP is enabled on ports.

   [SwitchA] interface ten-gigabitethernet 1/0/1
   [SwitchA-Ten-GigabitEthernet1/0/1] lldp enable
   

   # Configure LLDP to operate in TxRx mode on Ten-GigabitEthernet 1/0/1.

   [SwitchA-Ten-GigabitEthernet1/0/1] lldp admin-status txrx
   

   # Configure CDP-compatible LLDP to operate in TxRx mode on Ten-GigabitEthernet 1/0/1.

   [SwitchA-Ten-GigabitEthernet1/0/1] lldp compliance admin-status cdp txrx
   [SwitchA-Ten-GigabitEthernet1/0/1] quit
   

   # Enable LLDP on Ten-GigabitEthernet 1/0/2. By default, LLDP is enabled on ports.

   [SwitchA] interface ten-gigabitethernet 1/0/2
   [SwitchA-Ten-GigabitEthernet1/0/2] lldp enable
   

   # Configure LLDP to operate in TxRx mode on Ten-GigabitEthernet 1/0/2.

   [SwitchA-Ten-GigabitEthernet1/0/2] lldp admin-status txrx
   

   # Configure CDP-compatible LLDP to operate in TxRx mode on Ten-GigabitEthernet 1/0/2.

   [SwitchA-Ten-GigabitEthernet1/0/2] lldp compliance admin-status cdp txrx
   [SwitchA-Ten-GigabitEthernet1/0/2] quit
   

# Verify that Switch A has completed the following tasks:

• Discovering the IP phones connected to Ten-GigabitEthernet 1/0/1 and Ten-GigabitEthernet 1/0/2.

• Obtaining IP phone information.

[SwitchA] display lldp neighbor-information

CDP neighbor-information of port 1[Ten-GigabitEthernet1/0/1]:
 CDP neighbor index  : 1
 Chassis ID          : SEP00141CBCDBFE 
 Port ID             : Port 1
 Software version    : P0030301MFG2
 Platform            : Cisco IP Phone 7960
 Duplex              : Full

CDP neighbor-information of port 2[Ten-GigabitEthernet1/0/2]:
 CDP neighbor index  : 2
 Chassis ID          : SEP00141CBCDBFF
 Port ID             : Port 1
 Software version    : P0030301MFG2
 Platform            : Cisco IP Phone 7960
 Duplex              : Full