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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:
■
provide information on network connectivity capabilities (for
example, a multi-port VoIP phone with Layer 2 switch capability)
■
support the fast start capability
N o t e
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.
•
hardware revision
•
firmware revision
•
software revision
•
serial number
•
manufacturer name
•
model name
• asset ID
3500-5400-6200-8200-MCG-Jan08-K_13_01.book Page 58 Monday, January 28, 2008 10:04 AM