Extreme Networks Altitude 4700 Series, Руководство по продукции

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Altitude 4700 Series Access Point Product Reference Guide
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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.