R0106-HP MSR Router Series Layer 2 - LAN Switching Configuration Guide(V7)

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Figure 32 LLDP neighbor relationships

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 33 Ethernet II-encapsulated LLDP frame

Table 10 Fields in an Ethernet II-encapsulated LLDP frame

Field Descri

tion

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 the nearest bridge

agents.

• 0x0180-C200-0000 for LLDP frames destined for the nearest customer

bridge agents.

• or 0x0180-C200-0003 for LLDP frames destined for the nearest 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.