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Configuring for Network Management Applications

LLDP (Link-Layer Discovery Protocol)

■ able to use the following network policy elements configured on the

client port

• voice VLAN ID

• 802.1p (Layer 2) QoS

• Diffserv codepoint (DSCP) (Layer 3) QoS

■ discover and advertise device location data learned from the switch

■ support emergency call service (ECS—such as E911, 999, and 112)

■ advertise device information for the device data inventory collected

by the switch, including:

• hardware revision

• serial number

• asset ID

• firmware revision

• manufacturer name

• software revision

• model name

■ provide information on network connectivity capabilities (for

example, a multi-port VoIP phone with Layer 2 switch capability)

■ support the fast start capability

Note LLDP-MED on the switches covered in this guide is intended for use with VoIP

endpoints, and is not designed to support links between network

infrastructure devices, such as switch-to-switch or switch-to-router links.

LLDP-MED Endpoint Device Classes. LLDP-MED endpoint devices are,

by definition, located at the network edge and communicate using the LLDP-

MED framework. Any LLDP-MED endpoint device belongs to one of the

following three classes:

■ Class 1 (Generic Endpoint Devices): These devices offer the basic

LLDP discovery services, network policy advertisement (VLAN ID,

Layer 2/802.1p priority, and Layer 3/DSCP priority), and PoE manage-

ment. This class includes such devices as IP call controllers and

communication-related servers.

■ Class 2 (Media Endpoint Devices): These devices offer all Class 1

features plus media streaming capability, and include such devices as

voice/media gateways, conference bridges, and media servers.

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