H3C S7500E-X Configuration Manual page 231

LLDP frame formats
LLDP sends device information in LLDP frames. LLDP frames are encapsulated in Ethernet II or
SNAP frames.
•
LLDP frame encapsulated in Ethernet II
Figure 70 Ethernet II-encapsulated LLDP frame
Table 17 Fields in an Ethernet II-encapsulated LLDP frame
Field
Destination MAC address
Source MAC address
Type
Data
FCS
•
LLDP frame encapsulated in SNAP
Description
MAC address to which the LLDP frame is advertised. LLDP specifies
different multicast MAC addresses as destination MAC addresses for
LLDP frames destined for agents of different types. This helps
distinguish between LLDP frames sent and received by different agent
types on the same interface. The destination MAC address is fixed to
one of the following multicast MAC addresses:
•
0x0180-C200-000E for LLDP frames destined for nearest bridge
agents.
•
0x0180-C200-0000 for LLDP frames destined for nearest customer
bridge agents.
•
0x0180-C200-0003 for LLDP frames destined for nearest
non-TPMR bridge agents.
MAC address of the sending port.
Ethernet type for the upper-layer protocol. This field is 0x88CC for
LLDP.
LLDPDU.
Frame check sequence, a 32-bit CRC value used to determine the
validity of the received Ethernet frame.
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