HP V1910, Руководство пользователя

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Field Description
FCS
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame.
Table 57 SNAP-encapsulated LLDPDU format
b.
SNAP-encapsulated LLDPDU format
3.
Fields in a SNAP encapsulated LLDPDU
Field Description
Destination MAC address
The MAC address to which the LLDPDU is advertised. It is fixed to
0x0180-C200-000E, a multicast MAC address.
Source 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.
Type
The SNAP-encoded LLDP Ethernet 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 carries a
specific type of device information, as shown in
a .
a.
LLDPDU encapsulation format
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.