HP 5820X Series

201
Field Description
FCS
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame
2. SNAP-encapsulated LLDPDU format
Figure 67 SNAP-encapsulated LLDPDU format
The fields in the frame are described in Table 24:
Table 24 Description of the fields in a SNAP-encapsulated LLDPDU
Field Description
Destination MAC address
The MAC address to which the LLDPDU is advertised. It is fixed to 0x0180-
C200-000E, a multicast MAC address.
Source MAC address
The MAC address of the sending port. If the port does not have a MAC
address, the MAC address of the sending bridge is used.
Type
The SNAP type for the upper layer protocol. It is 0xAAAA-0300-0000-88CC
for LLDP.
Data LLDPDU
FCS
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame
LLDPDUs
LLDP uses LLDPDUs to exchange information. An LLDPDU comprises multiple TLV sequences. Each carries
a specific type of device information, as shown in Figure 68.
Figure 68 LLDPDU enca
psulation format
An LLDPDU can carry up to 28 types of TLVs. Mandatory TLVs include Chassis ID TLV, Port ID TLV, Time To
Live TLV, and End of LLDPDU TLV. Other TLVs are optional.