• Supported Platforms
• EX Series

• Related Topics
• Configuring LLDP (J-Web Procedure)
• Configuring LLDP-MED (CLI Procedure)
• Understanding 802.1X and LLDP and LLDP-MED on EX Series Switches

Configuring LLDP (CLI Procedure)

EX Series switches use Link Layer Discovery Protocol (LLDP) and Link Layer Discovery Protocol–Media Endpoint Discovery (LLDP-MED) to learn and distribute device information on network links. The information allows the switch to quickly identify a variety of devices, resulting in a LAN that interoperates smoothly and efficiently.

This topic describes:

• Enabling LLDP on Interfaces
• Configuring for Fast Start
• Adjusting LLDP Advertisement Settings
• Adjusting SNMP Notification Settings of LLDP Changes
• Specifying a Management Address for the LLDP Management TLV

Enabling LLDP on Interfaces

LLDP is enabled on all interfaces by default. If it is disabled, you can enable LLDP by configuring it on all interfaces or specific interfaces.

To configure LLDP on all interfaces or on a specific interface:

Configuring for Fast Start

You can specify the number of LLDP-MED advertisements sent from the switch in the first second after it has detected an LLDP-capable device. The default is 3.

To configure the fast start value:

Adjusting LLDP Advertisement Settings

You can adjust the following settings for LLDP advertisements for troubleshooting or verification purposes. For normal operations, we recommend that you do not adjust these settings from the default values.

• To specify the frequency at which LLDP advertisements are sent (in seconds):
  
  

  [edit protocols lldp]
user@switch# set advertisement-interval 45
• To determine the length of time LLDP information is held before it is discarded (the multiplier value is used in combination with the advertisement-interval value):
  
  

  [edit protocols lldp]
user@switch# set hold-multiplier 5

Adjusting SNMP Notification Settings of LLDP Changes

You can adjust the following settings for SNMP notifications of LLDP changes. If the values are not specified or the interval values are set to 0, the notifications are disabled.

• To specify the frequency at which LLDP database changes are sent (in seconds):
  
  

  [edit protocols lldp]
user@switch# set lldp-configuration-notification-interval 600
• To specify the frequency at which changes in topology global statistics are sent (in seconds):
  
  

  [edit protocols lldp]
user@switch# set ptopo-configuration-trap-interval 600
• To specify the holding time (used in combination with the ptopo-configuration-trap-interval value) to determine the length of time that topology global statistics are held before they are is discarded (in seconds):
  
  

  [edit protocols lldp]
user@switch# set ptopo-configuration-maximum-hold-time 2147483647

Specifying a Management Address for the LLDP Management TLV

You can configure an IP management address to be used in the LLDP Management type, length, and value (TLV).

To configure the management address: