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Dell PowerConnect 55xx Systems User Guide
LLDP Overview
The Link Layer Discovery Protocol (LLDP) enables network managers to
troubleshoot and enhance network management by discovering and
maintaining network topologies over multi-vendor environments. LLDP
discovers network neighbors by standardizing methods for network devices to
advertise themselves to other systems, and to store discovered information.
Discovery information includes:
• Device identification
• Device capabilities
• Device configuration
The advertising device transmits multiple advertisement message sets in a
single LAN packet. The multiple advertisement message sets are sent in the
packet’s Type Length Value (TLV) field.
LLDP devices must support chassis and port ID advertisements, as well as
system name, system ID, system description, and system capability
advertisements.
LLDP Media Endpoint Discovery
(LLDP-MED) increases network flexibility
by enabling various IP systems to co-exist on a single network, and provides
the following features:
• Detailed network topology information, including information on which
devices are located on the network and where the devices are located, for
example, which IP phone is connect to which port, which software is
running on which switch, and which port is connected to which device.
• Automatic deployment of policies over networks for:
–
QoS Policies
–
Voice VLANs
• Emergency Call Service (E-911) via IP phone location information.
• Troubleshooting information. LLDP MED sends network managers alerts
for:
–
Port speed and duplex mode conflicts
–
QoS policy misconfigurations
Summary of Contents for POWERCONNECT 5524
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