ALFA PROCOMMUNICATION INFRASTRUCTURE Request a Quote
HOME / Configure Aggregation Mode for Switches

Configure Aggregation Mode for Switches

Fiber and communications infrastructure knowledge brief Published 07 Aug 2025

Prepared for preliminary research by the ALFA PRO knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Switch aggregation can be configured in static (manual) or dynamic (LACP) modes, with active and passive options for dynamic LAGs.Overview of Aggregation Modes

Link aggregation allows multiple physical ports to be combined into a single logical link, increasing bandwidth, providing redundancy, and enabling load balancing. Aggregation can be configured in:

  • Static (ON/manual) mode: Ports are manually added to a LAG without using LACP. This mode is suitable when the remote device does not support LACP and all ports must have consistent settings such as speed, duplex, VLANs, and link type .
  • Dynamic (LACP) mode: Ports negotiate aggregation automatically using the Link Aggregation Control Protocol (LACP). LACP ensures that only compatible ports are grouped and supports active and passive modes .
LACP Modes
  • Active mode: The port actively initiates LACP negotiation with the remote device. This is recommended when both ends support LACP .
  • Passive mode: The port responds to LACP requests but does not initiate negotiation. Useful when the remote device is set to active mode .
  • Fallback mode (FortiSwitch-specific): Allows a port to remain up even if the remote device does not send LACP PDUs, useful for PXE boot or non-LACP devices .
Key Configuration Considerations
  1. Port Consistency: All ports in a LAG must have the same:
    • Speed and duplex mode (full duplex required)
    • VLAN configuration (PVID and permitted VLANs)
    • Link type (trunk, hybrid, or access)
    • Flow control settings
  2. Number of Ports: Most switches support up to 8 ports per static aggregation group, though this may vary by vendor .
  3. Aggregator Selection (FortiSwitch): You can select the aggregator based on bandwidth (default) or port count when multiple aggregators exist .
Example Configuration Steps

Cisco/Dell Switches (CLI example):

  1. Enter configuration mode: configure terminal
  2. Select interfaces: interface range GigabitEthernet1/0/1 - 2
  3. Assign to a LAG:
    • Static: channel-group 1 mode on
    • Dynamic (LACP active): channel-group 1 mode active
  4. Exit configuration mode and save: end and write memory Huawei Switches (Manual Eth-Trunk):
  5. Create Eth-Trunk: interface Eth-Trunk 1
  6. Add member interfaces: interface GigabitEthernet0/0/1 → eth-trunk 1
  7. Ensure both ends match aggregation mode and port attributes FortiSwitch (CLI):
  8. Create LAG: config switch trunk → edit
  9. Set LACP mode: set lacp-mode active or passive
  10. Optionally configure aggregator selection: set aggregator-mode bandwidth or count
Verification
  • Check LAG status: show interfaces port-channel (Cisco/Dell) or get switch trunk (FortiSwitch)
  • Verify member ports are active and synchronized
  • Confirm traffic load balancing and redundancy
Best Practices
  • Match LAG numbers on both ends for easier management
  • Use LACP when possible for automatic negotiation and failover
  • Ensure all member ports have identical configurations to prevent LAG failure
  • Monitor LAG status regularly to detect misconfigurations or port flaps By following these steps and considerations, you can configure aggregation modes effectively to optimize bandwidth, redundancy, and network reliability across your switches .

Configure Aggregation Mode for Switches - ALFA PRO COMMUNICATION SYSTEMS (Pty) Ltd [PDF]

Configure Aggregation Mode for Switches

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

These are sample configuration commands for Cisco switches (for the exact commands, refer to the Cisco

Configuring Link Aggregation Group and Link Aggregation

This chapter describes Link Aggregation Group, Link Aggregation Control Protocol, and manual load balancing. This chapter also

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

These are sample configuration commands for Cisco switches.

Link Aggregation Control Protocol (LACP) Explained

Learn how to configure, test, and verify the Link Aggregation Control Protocol (LACP) on switches through a Packet

Tutorial

Learn how to configure a Cisco Switch Link Aggregation using the command-line, by following this simple step-by-step

Port Aggregation FAQs

In what order should I configure port aggregation on my switches? You should be certain that configuration changes are first done on

Link Aggregation: Static vs Dynamic, LACP, and MLAG

This article provides a comprehensive explanation of link aggregation — covering LACP,

Link aggregation groups | FortiSwitch 7.6.4 | Fortinet Document Library

For LAG control, the FortiSwitch unit supports the industry-standard Link Aggregation Control Protocol (LACP). The FortiSwitch unit

Aggregated Ethernet LACP for Switches | Junos OS | Juniper Networks

Learn about aggregated Ethernet LACP, and how to configure LACP and LACP link protection.

LACP mode configuration (Cisco)

LACP configuration on Cisco switch. Link Aggregation Control Protocol IEEE 802.3ad (LACP) is an open standard of Ethernet link

UniFi Port Switch Aggregation: What Is Switch

An aggregation switch is a network switch that sits between the access layer (edge

Link Aggregation Configuration

Link aggregation can work in manual mode or Link Aggregation Control Protocol (LACP) mode. In manual mode, you must manually

Link_Aggregation_Config_Guide

1 Link Aggregation Configuration Guide This document describes the Link Aggregation feature supported in

3 Steps of Cisco LACP Config | Link Aggregation Control Protocol

In this LACP Cisco Configuration Example, we will learn How to Configure Link Aggregation COntrol Protocol on Cisco

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

Configuring Cisco Switches for Link Aggregation Load Sharing Mode These are sample configuration commands for

How to Configure EtherChannel Link Aggregation Control Protocol

Manual Etherchannel Configuration - Without using any negotiation protocol listed above Link Aggregation Control Protocol (LACP)

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

Configuring Cisco Switches for Link Aggregation Load Sharing Mode These are sample configuration commands for

Dynamic vs Static Link Aggregation: Differences & Use

Learn the key differences between static and dynamic link aggregation (LACP). Compare

What are Link Aggregation Groups (LAGs) and how do

What are Link Aggregation Groups (LAGs) and how do they work with my managed switch?

EtherChannel Link Aggregation Control Protocol (LACP)

This post explains Link Aggregation Control Protocol (LACP) in networking and provides LACP configuration and verification examples.

Support

When you configure suppression interval settings on an aggregate interface, make sure its peer interface is also an aggregate

Support

BFD sessions for link aggregation do not support the echo packet mode and the Demand mode. · H3C recommends not configuring

Example for Configuring Link Aggregation in LACP Mode When Switches

Overview Ethernet link aggregation increases link bandwidth by bundling multiple physical links to form a logical link. Link

How to configure Link Aggregation with NETGEAR switches by Derek

Using the Netgear switch web administration interface to perform link aggregation between two netgear switches by

What are link aggregation and LACP and how can I use them in my

You can also configure more than one LAG on the same switch, or add more than two Ethernet links to the same LAG

Configuring Link Aggregation Group and Link Aggregation

Link Aggregation Group and Link Aggregation Control Protocol Configuration Procedures Cost savings resulting from use of existing

Support

When aggregating ports, link aggregation control automatically assigns each port an operational key based on port attributes,

Support

You must configure the same aggregation mode at the two ends of an aggregate link. · For a successful static aggregation, make

LACP mode configuration (Cisco)

LACP configuration on Cisco switch. Link Aggregation Control Protocol IEEE 802.3ad (LACP) is an open standard of Ethernet link

UniFi Port Switch Aggregation: What Is Switch

An aggregation switch is a network switch that sits between the access layer (edge

Link Aggregation Configuration

Link aggregation can work in manual mode or Link Aggregation Control Protocol (LACP) mode. In manual mode, you must manually

Link_Aggregation_Config_Guide

1 Link Aggregation Configuration Guide This document describes the Link Aggregation feature supported in

3 Steps of Cisco LACP Config | Link Aggregation Control Protocol

In this LACP Cisco Configuration Example, we will learn How to Configure Link Aggregation COntrol Protocol on Cisco

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

Configuring Cisco Switches for Link Aggregation Load Sharing Mode These are sample configuration commands for

Networking: Link Aggregation

This mode provides fault tolerance. 802.3ad (IEEE 802.3ad Dynamic Link Aggregation): Creates aggregation groups that share the

Link Aggregation and Load Balancing

You may want to set up and configure a bonded link between your Meraki MS switch and a Cisco switch. This is often

Support

You must configure the same aggregation mode at the two ends of an aggregate link. · For a successful static aggregation, make

EtherChannel Port Aggregation Protocol (PAgP)

This post explains Port Aggregation Protocol (PAgP) and provides a sample configuration that can help you with your CCNA 200-301

How to Configure EtherChannel Link Aggregation Control Protocol

Manual Etherchannel Configuration - Without using any negotiation protocol listed above Link Aggregation Control Protocol (LACP)

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

Configuring Cisco Switches for Link Aggregation Load Sharing Mode These are sample configuration commands for

Dynamic vs Static Link Aggregation: Differences & Use Cases

Learn the key differences between static and dynamic link aggregation (LACP). Compare Cisco EtherChannel and

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

These are sample configuration commands for Cisco switches (for the exact commands, refer to the Cisco

Configuring Link Aggregation Group and Link Aggregation

This chapter describes Link Aggregation Group, Link Aggregation Control Protocol, and manual load balancing. This chapter also

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

These are sample configuration commands for Cisco switches.

Link Aggregation Control Protocol (LACP) Explained

Learn how to configure, test, and verify the Link Aggregation Control Protocol (LACP) on switches through a Packet

Tutorial

Learn how to configure a Cisco Switch Link Aggregation using the command-line, by following this simple step-by-step

Port Aggregation FAQs

In what order should I configure port aggregation on my switches? You should be certain that configuration changes are first done on

Link Aggregation: Static vs Dynamic, LACP, and MLAG

This article provides a comprehensive explanation of link aggregation — covering LACP,

Link aggregation groups | FortiSwitch 7.6.4 | Fortinet Document Library

For LAG control, the FortiSwitch unit supports the industry-standard Link Aggregation Control Protocol (LACP). The FortiSwitch unit

Aggregated Ethernet LACP for Switches | Junos OS | Juniper Networks

Learn about aggregated Ethernet LACP, and how to configure LACP and LACP link protection.

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

These are sample configuration commands for Cisco switches (for the exact commands, refer to the Cisco

Configuring Link Aggregation Group and Link Aggregation

This chapter describes Link Aggregation Group, Link Aggregation Control Protocol, and manual load balancing. This chapter also

Configuring Cisco Switches for Link Aggregation Load Sharing Mode

These are sample configuration commands for Cisco switches.

Link Aggregation Control Protocol (LACP) Explained

Learn how to configure, test, and verify the Link Aggregation Control Protocol (LACP) on switches through a Packet

Tutorial

Learn how to configure a Cisco Switch Link Aggregation using the command-line, by following this simple step-by-step

Related Video Reference

This video was associated with the source search result. Verify technical details against current product documentation and project requirements.

Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

Fiber and Communications Infrastructure Updates

Still Have a Technical Question?

Use the inquiry form to describe the product category, application, interfaces, capacity and installation environment.

Start a Project Inquiry