188
Field Descri
tion
Source MAC address
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 Ethernet type for the upper layer protocol. It is 0x88CC for LLDP.
Data LLDPDU.
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 65 SNAP-encapsulated LLDPDU format
Table 22 Fields in a SNAP-encapsulated LLDPDU
Field Descri
tion
Destination MAC address
MAC address to which the LLDPDU is advertised. It is fixed at
0x0180-C200-000E, a multicast MAC address.
Source MAC address MAC address of the sending port.
Type
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 TLV
carries a type of device information, as shown in Figure 66.
Figure 66 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.
To Next Page
Loading...
Need help?
General