Ruijie RG-WLAN Series User Manual

Configuration Guide Configuring LLDP
5.3 Features
Basic Concepts
 LLDPDU
LLDPDU is a protocol data unit encapsulated into an LLDP packet. Each LLDPDU is a sequence of TLV structures. The TLV
collection consists of three mandatory TLVs, a series of optional TLVs, and one End Of TLV. The following figure shows the
format of an LLDPDU.
Figure 5-3 LLDPDU Format
In the preceding figure:
 M indicates a mandatory TLV.
 In an LLDPDU, Chassis ID TLV, Port ID TLV, Time To Live TLV, and End Of LLDPDU TLV are mandatory and TLVs of
other TLVs are optional.
 LLDP Encapsulation Format
LLDP packets can be encapsulated in two formats: Ethernet II and Subnetwork Access Protocols (SNAP).
The following figure shows the format of LLDP packets encapsulated in the Ethernet II format.
Figure 5-4 Ethernet II Format
In the preceding figure:
 Destination Address: Indicates the destination MAC address, which is the LLDP multicast address 01-80-C2-00-00-0E.
 Source Address: Indicates the source MAC address, which is the port MAC address.
 Ethertype: Indicates the Ethernet type, which is 0x88CC.
 LLDPDU: Indicates the LLDP protocol data unit.
 FCS: Indicates the frame check sequence.
Figure 5-5 shows the format of LLDP packets encapsulated in the SNAP format.
Figure 5-5 SNAP Format
In the preceding figure:

Ruijie RG-WLAN Series Specifications

General

Brand	Ruijie
Model	RG-WLAN Series
Category	Wireless Access Point
Language	English