Orion A10E - Table 9-1 TLV Type; Figure 9-9 Basic TLV Structure; Figure 9-8 LLDPDU Structure

Orion Networks
A10E/A28E/A28F Configuration Guide
9 System management
Orion Networks
309
Basic concepts
LLDP packet is to encapsulate LLDPDU Ethernet packet in data unit and transmitted by
multicast.
LLDPDU is data unit of LLDP. The device encapsulates local information in TLV before
forming LLDPDU, then several TLV fit together in one LLDPDU and encapsulated in
Ethernet data for transmission.
As shown in Figure 9-9, LLDPDU is made by several TLV, including 4 mandatory TLV and
several optional TLV.
Figure 9-8 LLDPDU structure
TLV: unit combining LLDPDU, which refers to the unit describing the object type, length and
information.
As shown in Figure 9-9, each TLV denotes piece of information at local, such as device ID,
interface ID, etc. related Chassis ID TLV, Port ID TLV fixed TLV.
Figure 9-9 Basic TLV structure
TLV type value relationship is shown below; at present only types 0–8 are used.
Table 9-1 TLV type
TLV type
Description
Optional or required
0
End Of LLDPDU
Required
1
Chassis ID
Required
2
Port ID
Required
3
Time To Live
Required
4
Port Description
Optional
5
System Name
Optional
6
System Description
Optional
7
System Capabilities
Optional
8
Management Address
Optional