224
Figure 69 Ethernet II-encapsulated LLDP frame
Table 17 Fields in an Ethernet II-encapsulated LLDP frame
Field Description
Destination MAC address
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.
Source MAC address
MAC address of the sending port.
Type
Ethernet type for the upper-layer protocol. It is 0x88CC for LLDP.
Data
LLDPDU. An LLDP frame contains only one LLDPDU.
FCS
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame.
•
LLDP frame encapsulated in SNAP
Figure 70 SNAP-encapsulated LLDP frame