HP V1910 User Manual page 231

V1910 switch series
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Field
FCS
Table 57
SNAP-encapsulated LLDPDU format
SNAP-encapsulated LLDPDU format
b.
Fields in a SNAP encapsulated LLDPDU
3.
Field
Destination MAC address
Source MAC address
Type
Data
FCS
LLDPDUs
LLDP uses LLDPDUs to exchange information. An LLDPDU comprises multiple TLV sequences. Each carries a
specific type of device information, as shown in a.
LLDPDU encapsulation format
a.
An LLDPDU can carry up 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.
TLVs
TLVs are type, length, and value sequences that carry information elements. The type field identifies the type
of information, the length field indicates the length of the information field in octets, and the value field
contains the information itself.
Description
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame.
Description
The MAC address to which the LLDPDU is advertised. It is fixed to
0x0180-C200-000E, a multicast 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.
The SNAP-encoded LLDP Ethernet type for the upper layer protocol. It is
0xAAAA-0300-0000-88CC for LLDP.
LLDPDU.
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame.
219

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