Name: Dell Force10 MXL Blade
Brand: Dell
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Link Layer Discovery Protocol (LLDP) | 313

Link Layer Discovery Protocol (LLDP)

This chapter contains the following sections:

• Overview

• TIA-1057 (LLDP-MED) Overview

• Configuring LLDP

Overview

Link layer discovery protocol (LLDP)—defined by IEEE 802.1AB—is a protocol that enables a local area

network (LAN) device to advertise its configuration and receive configuration information from adjacent

LLDP-enabled LAN infrastructure devices. The collected information is stored in a management

information base (MIB) on each device, and is accessible via a simple network management protocol

(SNMP).

Protocol Data Units

Configuration information is exchanged in the form of type, length, value (TLV) segments. Figure 18-1

shows the Chassis ID TLV.

• Type—the kind of information included in the TLV

• Length—the value, in octets, of the TLV after the Length field

• Value—the configuration information that the agent is advertising

Figure 18-1. Type, Length, Value (TLV) Segment

Chassis ID Sub-type

fnC0057m

Chassis ID

7 bits

9 bits

1 octet

1- 255 octets

TLV Type

(1-127)

TLV Length

Value

TLV Header

0-511 octets

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