Link Layer Discovery Protocol (LLDP) Configuration Properties on ESW2-550X Switch

Objective

The Link Layer Discovery Protocol (LLDP) is a link layer protocol that standardizes methods for network devices to advertise themselves to systems and to store discovered information which facilitates network managers to troubleshoot and enhance network management in multi-vendor environments. LLDP enables a network device to advertise its identification, configuration, and capabilities to neighboring devices that then store the data in a Management Information Base (MIB).

This article explains how to configure LLDP properties which includes how to enable/disable the LLDP feature globally and setting timers on ESW2-550X switches.

Applicable Devices

• ESW2-550X-48DC-R
• ESW2-550X-48-R

Software Version

• v1.2.9.44

LLDP Properties Configuration

Step 1. Log in to the Switch Configuration Utility to choose Administration > Discovery - LLDP > Properties. The Properties page opens.

Step 2. Check the LLDP Status check box to enable LLDP on the switch. By default, the LLDP Status is checked.

Step 3. (Optional) If the LLDP status is disabled, click the desired radio button  of LLDP Frame Handling which specifies the action to be taken if a LLDP packet is received.

• Filtering — Packet is deleted.

• Flooding — Packet is forwarded to all VLAN members.

Step 4. To configure the parameters in the LLDP Properties area, click the Use Default radio button in order to use the default value. Otherwise, click the User Defined radio button and enter the value in the User Defined field.

• TLV Advertise Interval — Denotes the rate in seconds at which LLDP advertisement updates are sent.

– Use Default — The default TLV advertise interval is 30 seconds.

– User Defined — The user defined advertise interval ranges from 5 to 32768.

• Topology Change SNMP Notification Interval — Denotes the minimum time interval between SNMP notifications when there is change in the topology.

– Use Default — The default time is 5 seconds.

– User Defined — The user defined notification interval ranges from 5 to 3600.

• Hold Multiplier — Denotes the amount of time that LLDP packets are held before the packets are discarded, measured in multiples of the TLV Advertise Interval.

– Use Default — The default value is 4.

– User Defined — The user defined value ranges from 2 to 10.

• Reinitializing Delay — Denotes the time interval in seconds that passes between disabling and reinitializing LLDP, following an LLDP enable/disable cycle.

– Use Default — The default time interval is 2 seconds.

– User Defined — The user defined time interval ranges from 1 to 10 seconds.

• Transmit Delay — Denotes the amount of time in seconds that passes between successive LLDP frame transmissions due to changes in the LLDP local systems MIB.

– Use Default — The default time interval is 2 seconds.

– User Defined — The user defined time interval ranges from 1 to 8192 seconds.

Step 5. In the Fast Start Repeat Count field, enter the number of times LLDP packets are to be sent when the LLDP-MED Fast Start mechanism is initialized. The default is 2 and it ranges from 1 to 8192. LLDP-Media Endpoint Discovery (LLDP-MED) is an extension of LLDP that allows LLDP to support media endpoint devices. One example is that its policy allows it to enable the advertisement and discovery of network policies for real-time applications like voice or video.

Note: LLDP-MED Fast Start mechanism is initialized when a new endpoint device links to the switch.

Step 6. Click Apply to save the configuration settings.