Managing Lldp; Lldp Global Configuration - Ubiquiti EdgeSwitch ES-24-250W Administration Manual

EdgeSwitch Administration Guide
™

Managing LLDP

The IEEE 802.1AB defined standard, Link Layer Discovery Protocol (LLDP), allows stations residing on an
802 LAN to advertise major capabilities and physical descriptions. This information is viewed by a network
manager to identify system topology and detect bad configurations on the LAN.
LLDP is a one-way protocol; there are no request/response sequences. Information is advertised by stations
implementing the transmit function, and is received and processed by stations implementing the receive
function. The transmit and receive functions can be enabled/disabled separately per port. By default, both
transmit and receive are disabled on all ports. The application is responsible for starting each transmit and
receive state machine appropriately, based on the configured status and operational state of the port.
The EdgeSwitch software allows LLDP to have multiple LLDP neighbors per interface. The number of such
neighbors is limited by the memory constraints. A product-specific constant defines the maximum number
of neighbors supported by the switch. There is no restriction on the number of neighbors supported on a
per LLDP port. If all the remote entries on the switch are filled up, the new neighbors are ignored. In case of
multiple VOIP devices on a single interface, the 802.1ab component sends the Voice VLAN configuration to
all the VoIP devices.

LLDP Global Configuration

Use the LLDP Global Configuration page to specify LLDP parameters that are applied to the switch.
To display the LLDP Global Configuration page, click Switching > LLDP > Global in the navigation menu.
Field
Transmit Interval (Seconds)
Transmit Hold Multiplier
(Seconds)
Re-Initialization Delay
(Seconds)
Notification Interval (Seconds) The minimum number of seconds to wait between transmissions of remote data change notifications
Use the buttons to perform the following tasks:
• If you make any changes to the page, click Submit to apply the new settings to the system.
• Click Refresh to update the screen with most recent data.
To retain the changes across the switch's next power cycle, click System > Configuration Storage > Save.
Ubiquiti Networks, Inc.
LLDP Global Configuration
LLDP Global Configuration Fields
Description
The number of seconds between transmissions of LLDP advertisements.
The Transmit Interval multiplier value, where Transmit Hold Multiplier × Transmit Interval = the time to
live (TTL) value the device advertises to neighbors.
The number of seconds to wait before attempting to reinitialize LLDP on a port after the LLDP
operating mode on the port changes.
to the SNMP trap receiver(s) configured on the device.
Configuring Switching Information
176