Objective

Link Layer Discovery Protocol (LLDP) is a link-layer discovery protocol that is defined in the IEEE 802.1AB standard. LLDP allows network devices to advertise information about themselves to other devices on the network. LLDP uses the Logical Link Control (LLC) services to transmit and receive information to and from other LLDP agents. LLC provides a Link Service Access Point (LSAP) for access to LLDP. Each LLDP frame is transmitted as a single MAC service request. Each incoming LLDP frame is received at the MAC Service Access Point (MSAP) by the LLC entity as a MAC service indication.

This article provides instructions on how to configure LLDP on your Wireless Access Point (WAP).

Applicable Devices

- WAP500 Series — WAP571, WAP571E

Software Version

- 1.0.0.15 — WAP571, WAP571E

Configure LLDP on your WAP

Benefits of Configuring LLDP

- Follows IEEE 802.1ab standard.

- Enables interoperability among multivendor devices.

- Facilitates troubleshooting of enterprise networks and uses standard network management tools.

- Provides extension for applications such as VoIP.

When LLDP is enabled, the WAP transmits its attributes based on type, length, and value descriptions, referred to as type-length-value (TLV).

Types of TLVs Supported

- Chassis ID TLV — The chassis ID subtype is 4 (MAC address), and the chassis ID is the Base MAC Address of the WAP

- Port ID TLV — The port ID subtype is 3 (MAC address), and the port ID is the Base MAC Address of the WAP

- Time to Live TLV — The time to live interval is set to the LLDP Transmit Interval multiplied by 4

- System Name TLV — The System Name TLV is set to the System Name configurable parameter

- System Description TLV — The System Description TLV is set to the Model status parameter

- System Capabilities TLV — The WAP sets the System Capabilities bit mask and the Enabled Capabilities bit mask to the same value. The Wireless Local Area Network (WLAN) Access Point Capability (bit 3) is set to 1. All other capability bits are set to 0.

Configure LLDP

Note: The images below are captured from WAP571.

Step 1. Log in to the access point web-based utility, and then choose LAN > LLDP.

Step 2. Make sure the LLDP Mode is set to Enabled.

Note: By default, LLDP Mode is set to enabled. If you do not want the WAP to use LLDP, set it to Disabled.

Step 3. Enter the value in the TX Interval field to specify the retransmit interval value. The default value is 30 seconds.

Step 4. Click Save.

You should now have configured the LLDP feature on your WAP. If you want to capture and store packets received and transmitted by the WAP, configure the Packet Capture feature. For instructions, click here.