LLDP Neighbors Viewer

Vincent_Bacher — Mon, 19 Jan 2026 13:54:35 GMT

🔌 LLDP Neighbors Viewer

A SmartConsole Extension for Network Topology Discovery
Display LLDP neighbor information from Check Point Gateways directly in SmartConsole.

📥 Installation URL:
https://vbacher.de/extension-lldp.json

Use this URL in SmartConsole under Manage & Settings → Extensions → Install Extension

📋 Overview

This extension displays the output of the lldpneighbors command in a table format within SmartConsole. LLDP (Link Layer Discovery Protocol) allows network devices to discover their neighbors. This extension provides that information without requiring CLI access to the gateway.

📊 What Information is Displayed

The extension shows the most relevant LLDP neighbor information in a clean table format:

Field	Description	Example
Interface	Local gateway interface name	`eth1-01`
System Name	Hostname of the neighbor device	`CORE-SW-01`
Port ID	Neighbor's port identifier (cleaned)	`GigabitEthernet1/0/24`
Port Description	Description of neighbor port (ACI-aware)	`Uplink to FW-GW-01`
Management Address	IPv4 management address of neighbor	`192.168.10.5`

🎯 Use Cases

Network Troubleshooting

Verify physical connections without accessing CLI
Quickly identify which switch and port a gateway is connected to
Detect miscabling or unexpected neighbors

Documentation

Document network topology from SmartConsole
Verify compliance with cabling standards
Create network diagrams with accurate port information

Data Center Operations

Validate ACI fabric connectivity
Verify vPC/LAG configurations
Identify connected leaf switches in ACI environments

💻 Installation

Prerequisites

Check Point SmartConsole with Extensions support (R80.40+)
Gateway with LLDP enabled (see LLDP Configuration below)

LLDP Configuration on Gateway

LLDP must be enabled globally and on interfaces. Connect to the gateway via Gaia Clish and configure:

1. Enable LLDP globally:

set lldp state on

2. Enable on interfaces (example):

set lldp interface eth1-01 transmit-and-receive on
set lldp interface eth1-02 transmit-and-receive on
set lldp interface eth2-01 transmit-and-receive on

Note: Replace interface names (eth1-01, eth1-02, etc.) with your actual interface names.

Interface Modes:

receive - Receive LLDP information only (minimum requirement for this extension)
transmit - Send LLDP information only
transmit-and-receive - Send and receive (recommended)

Important: At minimum, interfaces must be configured with receive mode for the extension to work. We recommend using transmit-and-receive for full bidirectional LLDP communication.

Verify configuration:

show configuration lldp

Installation Steps

The extension is hosted on a public server - no local installation required!

Open SmartConsole
Navigate to Manage & Settings → Extensions
Click Install Extension
Enter URL: https://vbacher.de/extension-lldp.json
Click OK to install
Extension will be installed and available immediately

✓ That's it! The extension is now ready to use.

🚀 Usage

Select a Gateway in SmartConsole (object tree or search)
Navigate to the "LLDP Neighbors" tab in the details pane
Click the "Load LLDP Neighbors" button
View the neighbor information in the table

Note: The extension runs the lldpneighbors command on the gateway via SmartConsole's run-script API. This requires appropriate permissions in your SmartConsole session.

⚙️ Compatibility

Supported Gateway Versions: R80.40+, R81.x (any version with lldpctl)
SmartConsole: R80.40+ with Extensions support
LLDP Daemon: OpenLLDP or lldpd

🔧 Troubleshooting

LLDP Service Not Running

If you see "LLDP daemon is not running on this gateway":

Connect to gateway via Gaia Clish
Check LLDP status: show configuration lldp
Enable LLDP globally: set lldp state on
Enable on interfaces: set lldp interface <name> transmit-and-receive on
Save configuration: save config

No Neighbors Detected

Possible reasons:

LLDP not enabled on interface: Check show configuration lldp
Interface mode is transmit only (needs receive or transmit-and-receive)
Neighbor device doesn't support LLDP or has LLDP disabled
Physical connection issue or interface is down

📝 Example Output

🔗 Useful Links

Ready to use! This extension provides network topology information directly in SmartConsole.

Re: LLDP Neighbors Viewer

the_rock — Mon, 19 Jan 2026 20:52:03 GMT

Let me give this one a try as well in the lab.

Re: LLDP Neighbors Viewer

the_rock — Mon, 19 Jan 2026 23:28:52 GMT

Just tested it, works like a charm.

Re: LLDP Neighbors Viewer

Mats_Rosen1 — Wed, 27 May 2026 13:37:37 GMT

Hello!
This extension has been very useful.
But with R82 the output from lldpneighbors has changed and the extension is no longer working.

Any plans on porting this extension to R82 compability?

Thanks,
//Mats

Re: LLDP Neighbors Viewer

Vincent_Bacher — Thu, 28 May 2026 17:44:01 GMT

Hi Mats,

thanks for letting me know.

As I am still on sick leave and not yet able to work I will create a reminder for myself.

Hopefully I will be able to work again in two weeks. Then I will check this.

I am sure I will be able to make an Update.

best

Vince

Re: LLDP Neighbors Viewer

Mats_Rosen1 — Fri, 29 May 2026 07:33:11 GMT

Hey Vince,

Sounds good.

I hope you get well soon!

//Mats

topic LLDP Neighbors Viewer in SmartConsole Extensions

LLDP Neighbors Viewer

🔌 LLDP Neighbors Viewer

📋 Overview

📊 What Information is Displayed

🎯 Use Cases

Network Troubleshooting

Documentation

Data Center Operations

💻 Installation

Prerequisites

LLDP Configuration on Gateway

Installation Steps

🚀 Usage

⚙️ Compatibility

🔧 Troubleshooting

LLDP Service Not Running

No Neighbors Detected

📝 Example Output

🔗 Useful Links

Re: LLDP Neighbors Viewer

Re: LLDP Neighbors Viewer

Re: LLDP Neighbors Viewer

Re: LLDP Neighbors Viewer

Re: LLDP Neighbors Viewer