Knowledge Base

How to enable and manage Link Layer Discovery Protocol (LLDP) on Dell Networking Force10 switches

This article explains how to enable and manage Link Layer Discovery Protocol (LLDP) on Dell Networking Force10 switches


1. Important Points to Remember
2. Configure LLDP
2. View LLDP configuration
4. View Information Advertised by Adjacent LLDP Agents

Important Points to Remember

  • LLDP is enabled by default starting at firmware release Prior versions LLDP is disabled by default.
  • Dell Networking systems support up to eight neighbors per interface.
  • Dell Networking systems support a maximum of 8000 total neighbors per system. If the number of interfaces multiplied by eight exceeds the maximum, the system does not configure more than 8000.
  • Interface level configurations override all configuration level configurations.

Configure LLDP



FTOS# configure

Enter configuration mode.

FTOS(config)# protocol LLDP

Enter LLDP mode.

FTOS(config-lldp)# no disable

Disable turns off LLDP globally. No disable turns on LLDP globally. Since the protocol was introduced as "disabled" then the negative of that statement turns on the protocol.

FTOS(conf-if-te-0/10)#protocol lldp

The same LLDP mode is found at the interface level. All specific interface level LLDP mode commands override any globally configured LLDP parameters.

View LLDP Configuration

Dell(conf)#protocol lldp

Dell(conf-lldp)#show config


protocol lldp

advertise dot1-tlv port-protocol-vlan-id port-vlan-id

advertise dot3-tlv max-frame-size

advertise management-tlv system-capabilities system-description hello 10

no disable



Dell(conf)#interface gigabitethernet 1/31

Dell(conf-if-gi-1/31)#show config


interface GigabitEthernet 1/31

no ip address


no shutdown

Dell(conf-if-gi-1/31)#protocol lldp

Dell(conf-if-gi-1/31-lldp)#show config


protocol lldp


View Information Advertised by Adjacent LLDP Agents

  • Display brief information about adjacent devices.

    show lldp neighbors.

  • Display all of the information that neighbors are advertising.

    show lldp neighbors detail

    Example of viewing Brief Information Advertised by Neighbors


    Dell (conf-if-te-0/3)#do show lldp neighbors

    Loc PortID Rem Host Name Rem Port Id Rem Chassis Id


    Te 0/1 - TenGigabitEthernet 0/5 00:01:e8:05:40:46

    Te 0/2 - TenGigabitEthernet 0/6 00:01:e8:05:40:46

    Dell (conf-if-te-0/3)#

    Example of Viewing Details Advertised by Neighbors

    Dell#show lldp neighbors detail


    Local Interface Te 0/4 has 1 neighbor

    Total Frames Out: 6547

    Total Frames In: 4136

    Total Neighbor information Age outs: 0

    Total Frames Discarded: 0

    Total In Error Frames: 0

    Total Unrecognized TLVs: 0

    Total TLVs Discarded: 0

    Next packet will be sent after 7 seconds

    The neighbors are given below:


    Remote Chassis ID Subtype: Mac address (4)

    Remote Chassis ID: 00:01:e8:06:95:3e

    Remote Port Subtype: Interface name (5)

    Remote Port ID: TeGigabitEthernet 2/11

    Local Port ID: TenGigabitEthernet 1/21

    Locally assigned remote Neighbor Index: 4

    Remote TTL: 120

    Information valid for next 120 seconds

    Time since last information change of this neighbor: 01:50:16

    Remote MTU: 1554

    Remote System Desc: Dell Networks Real Time Operating System Software

    Dell Operating System Version: 1.0.

    Dell Application Software Version: Copyright (c) 1999-2014

    Build Time: Thu Aug 9 01:05:51 PDT 1999-2014

    Existing System Capabilities: Repeater Bridge Router

    Enabled System Capabilities: Repeater Bridge Router

    Remote Port Vlan ID: 1

    Port and Protocol Vlan ID: 1, Capability: Supported, Status: Enabled


  • Article ID: HOW10596

    Last Date Modified: 06/04/2018 05:19 PM

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