Tlv Overview - HP A5830 Configuration Manual

Table 17 Fields in an Ethernet II-encapsulated LLDPDU
Field
Destination MAC address
Source MAC address
Type
Data
FCS
SNAP-encapsulated LLDPDU format
2.
Figure 66 SNAP-encapsulated LLDPDU format
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Table 18 Fields in a SNAP-encapsulated LLDPDU
Field
Destination MAC address
Source MAC address
Type
Data
FCS

TLV Overview

TLVs are type, length, and value sequences that carry information elements. The type field identifies the
type of information, the length field measures the length of the information field in octets, and the value
field contains the information itself.
LLDPDU TLVs fall into the following categories:
 Basic management TLVs
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 Ethernet type for the upper layer protocol. It is 0x88CC for LLDP.
LLDPDU.
Frame check sequence, a 32-bit CRC value used to determine the validity of
the received Ethernet frame.
15
Destination MAC address
Source MAC address
Type
Data = LLDPU
(n bytes)
FCS
Description
The MAC address to which the LLDPDU is advertised. It is fixed at 0x0180-
C200-000E, a multicast MAC address.
The MAC address of the sending port.
The SNAP 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.
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