Reference Guide

Link Layer Discovery Protocol (LLDP) | 555

Link Layer Discovery Protocol (LLDP)

Link Layer Discovery Protocol (LLDP) is supported only on the S5000 switch.

This chapter contains the following sections:

• 802.1AB (LLDP) Overview

• Optional TLVs

• TIA-1057 (LLDP-MED) Overview

• Configuring LLDP

• Advertising TLVs

• Viewing the LLDP Configuration

• Viewing Information Advertised by Adjacent LLDP Agents

• Configuring LLDPDU Intervals

• Configuring Transmit and Receive Mode

• Configuring a Time to Live

• Debugging LLDP

• Relevant Management Objects

802.1AB (LLDP) Overview

Link Layer Discovery Protocol (LLDP)—defined by IEEE 802.1AB—is a protocol that enables a 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 SNMP.

Protocol Data Units

Configuration information is exchanged in the form of Type, Length, Value (TLV) segments. Figure 30-1

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