
Industrial Managed
Ethernet Switch
User Manual
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2.16 LLDP
L
ink
L
ayer
D
iscovery
P
rotocol (
LLDP
) is an IEEE802
.
1ab standard OSI layer
-
2 protocol. LLDP allows Ethernet
network devices to advertise details about themselves, such as device configuration, capabilities and identification.
The advertise packets are periodically sent to directly connected devices on the network that are also using LLDP
or so called its neighbors
.
LLDP is a
“one hop” unidirectional protocol in an advertising mode
.
LLDP information can only be sent to and received by devices, no solicit information or state changes between
nodes
.
The device has a choice to turn on and off sending and receiving function independently
.
Advertised
information is not forward on to other devices on the network. LLDP is designed to be managed with SNMP
.
Applications that use this protocol include topology discovery, inventory management, emergency services, VLAN
assignment, and inline power supply
.
L
ink
L
ayer
D
iscovery Protocol (LLDP) section consists of
LLDP Setting
and
LLDP Neighbors
as shown in Figure
Figure 2.161 LLDP Dropdown Menu
2.16.1 LLDP Settings
In Figure 2.162, the LLDP Setting webpage allows users to have options for enabling or disabling the LLDP, as well
as setting LLDP transmission parameters
.
This LLDP function should be enabled if users want to use Atop
’s Device
Management Utility (formerly called Device View) to monitor the switches
’ topology of all LLDP devices in the
network
.
For more information about using Device Management Utility, please refer to Chapter 5 in this document
.
Table 2.59 describes the LLDP Setting parameters which are transmit interval and transmit time-to-live of the LLDP
advertisement packets.
Figure 2.162 LLDP Setting Webpage
Table 2.59 Descriptions of LLDP Setting
Label
Description
Factory
Default
LLDP
Choose to either enable or disable LLDP
.
Enabled
Tx Interval
Set the transmit interval of LLDP messages
.
Range from 5 to 65535 seconds
.
30