Extreme Networks Altitude 4700 Series Product Reference Manual page 109

The information is in a Type Length Value (TLV) format for each data item. TLV information is
transmitted in an LLDP protocol data unit (LLDPDU), enclosed in an Ethernet frame and sent to a
destination MAC address. Certain TLVs are mandatory, and always sent once LLDP is enabled, while
other TLVs are optionally configured. LLDP defines a set of common advertisement messages, a
protocol for transmitting the advertisements and a method for storing information in received
advertisements. A controller can receive and record the TLVs, but not transmit them. The information
distributed using LLDP is stored by its recipients in a standard MIB, making it possible for the
information to be accessed by an NMS using a management protocol such as SNMP.
LLDP transmits periodic advertisements containing device information and media-specific configuration
information to neighbors attached to the same network. LLDP agents cannot solicit information from
other agents by way of LLDP.
To configure LLDP support:
1 Select System Configuration > LLDP from the menu tree.
2 Select the Enable LLDP radio button to Enable or Disable the transmission of LLDP advertisements.
LLDP is enabled by default.
3 Set a Refresh Interval (in seconds 5-32768) to define the refresh-interval/transmit-interval. The Refresh
Interval is the interval LLDP frames is transmitted on behalf of the LLDP agent. The default is 30
seconds.
4 Set a Holdtime Multiplier (2-10) to define the holdtime multiplier. The default setting is 4.
5 Click Apply to save any changes to the LLDP screen. Navigating away from the screen without
clicking the Apply button results in all changes to the screen being lost.
6 Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the settings
displayed on LLDP screen to the last saved configuration.
Altitude 4700 Series Access Point Product Reference Guide
109