Technical Documentation

Example: Configuring LLDP

The following example configures LLDP on interface ge-1/1/1 but disables LLDP on all other interfaces, explicitly configures the default values for all automatically enabled features, and configures a value of 30 seconds for the LLDP configuration notification interval and a value of 30 seconds for the physical topology trap interval.

[edit]protocols {lldp {advertisement-interval 30;hold-multiplier 4;interface all {disable;}interface ge-1/1/1;lldp-configuration-notification-interval 30;ptopo-configuration-maximum-hold-time 300;ptopo-configuration-trap-interval 30;transmit-delay 2;}}

You verify operation of LLDP with several show commands:

  • show lldp <detail>
  • show lldp neighbors interface-name
  • show lldp statistics interface-name
  • show lldp local-information
  • show lldp remote-global-statisitics

You can clear LLDP neighbor information or statistics globally or on an interface:

  • clear lldp neighbors interface-name
  • clear lldp statistics interface-name

You can display basic information about LLDP with the show lldp detail command:

user@host> show lldp detail
LLDP                   : Enabled
Advertisement interval : 30 Second(s)
Transmit delay         : 2 Second(s)
Hold timer             : 4 Second(s)
Notification interval  : 30 Second(s)
Config Trap Interval   : 300 Second(s)
Connection Hold timer  : 60 Second(s)

Interface      LLDP       Neighbor count
ge-1/1/1       Enabled    0         
LLDP basic TLVs supported: 
Chassis identifier, Port identifier, Port description, System name, System description, System capabilities, Management address.

LLDP 802 TLVs supported: 
Link aggregation, Maximum frame size, MAC/PHY Configuration/Status, Port VLAN ID, Port VLAN name.

For more details about the output of these commands, see the Junos Routing Protocols and Policies Command Reference.

Published: 2010-05-11