Owner's Manual

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LLDP Global
LLDP (Link Layer Discovery Protocol) discovers network neighbors by standardizing methods for
network devices to advertise themselves to other system, and to store discovered information.
Device discovery information includes Device Identification, Device Capabilities, and Device
Configuration.
The advertising device transmits multiple advertisement message sets in a single LAN packet. The
multiple advertisement sets are sent in the packet Type Length Value (TLV) field. LLDP devices
must support chassis and port ID advertisement, as well as system name, system ID, system
description, and system capability advertisements. This screen configures LLDP global settings for
the selected equipment.
Figure 13-70. LLDP Global
This screen has the following fields:
-
LLDP Enabled —Check to enable LLDP. (Does not appear for all devices)
-
Hold Time (seconds) —The period that LLDP packets are held before they are discarded. The
possible field range is 2 - 10 seconds. The field default is 4 seconds. Does not appear on all
devices.
-
Hold Multiplier —Specifies multiplier on the transmit interval to assign to TTL. Default is 4
seconds (2 - 10). Does not appear on all devices.
-
Reinitialize Delay (seconds) —The time between disabling LLDP and when reinitializing
begins. The possible field range is 1 - 10 seconds. The field default is 2.
-
Transmit Delay (seconds) —The time between successive LLDP frame transmissions due to
changes in the LLDP local systems MIB. The possible field value is 0 - 32768 seconds. The
field default is 30 seconds.
-
Update Interval (seconds) —Indicates that rate at which LLDP advertisement updates are sent.
The possible field range is 5 - 3276 seconds. The default value is 30 seconds.