How to configure LAG (LACP) on Omada Switches via Omada Controller

This article applies to: All Omada Smart, L2+ and L3 switches.

Contents

Objective

Requirements

Introduction

Configuration

Verification

Conclusion

FAQ

Objective

This article describes in detail how to configure LAGs for Omada Switches in Controller mode and includes some FAQs about LAGs at the end of the article.

Requirements

• Omada Smart, L2+ and L3 switches
• Omada Controller (Software Controller / Hardware Controller / Cloud Based Controller, V5.9 and above)

Introduction

LAG (Link Aggregation Group), including static link aggregation and LACP (Link Aggregation Control Protocol), is a technology that can aggregate multiple physical ports into a logical interface, increasing link bandwidth and providing backup ports to enhance connection reliability.

LAG is commonly used in the backbone links of medium to large-sized networks to improve network reliability and performance, such as in data centers, enterprise networks, and service provider networks. Home users usually do not need to use LAG.

Before configuring LAG, first understand your network requirements, including bandwidth, redundancy, and failover, to avoid incorrectly configuring LAG and wasting network resources.

In this example, we will use the SG3452X and SG2428LP to configure LACP in controller mode.

Note: Before you start configuring LAG, please connect two switches with one Ethernet cable. After finishing the LAG configuration, we can connect switches with the other Ethernet cable.

Configuration

Step 1. Go to the Devices page to adopt the switches in the Controller.

Step 2. Configure LACP on both switches:

Go to Devices, click on the first switch (SG3452X) to enter its private configuration page. In Ports, edit Port 6.

Check the Profile Overrides box, select Aggregating and select the port (Port7) you want to use, set LAG ID to 1, and select the desired LACP mode. Click Apply.

Configure the settings on the second switch (SG2428LP) in a similar way.

Note:

(1) Ensure that both ends of the aggregation link work in the same LAG mode. For example, if the local end works in LACP mode, the peer end should also be set in LACP mode.

(2) There are two modes of LACP: Active and Passive. In Active mode, the port can send LACP packets actively; while in Passive mode, the port can only send LACP packets after it has received a LACP packet. It is suggested to set one side as Active mode and the other side as Passive mode.

Step 3. After configuring LACP, you may need to change the Hash Algorithm. Go to Devices, click on the switch to enter its private configuration page. In Config, you can the Hash Algorithm.

Verification

Go to Devices, click on the switch to enter its private configuration page. In Ports, click LAG to check LAG status of both switches.

SG3452X:

SG2428LP:

Note:

If you fail to configure LAG, please ensure that the relevant ports at both ends use the same speed and duplex. Go to Devices, click on the switch to enter its private configuration page. In Ports, click LAG to edit LAG1.

Then check the Profile Overrides box, then you can change the link speed.

Conclusion

At this point, we have completed LACP with two pairs of member ports.

Get to know more details of each function and configuration please go to Download Center to download the manual of your product.

FAQ

1. Advantages of LAG

Re: LAG can increase link bandwidth by bundling multiple physical interfaces into a logical interface. LAG can also provide link redundancy, so that if one link in the aggregated link fails, the other links can take over the traffic of the failed link, ensuring network continuity.

2. Which devices support LAG

Re: Except for Unmanaged Switches, most Omada Switches support LAG, but Easy Smart Switches usually only support Static LAG.

Some EAPs (such as AP9778) also support LAG.

3. Static LAG vs LACP

Re: Static LAG does not require protocol support, but needs to be manually configured, and all configured links are active links. A Static LAG group can have up to 8 member links normally.

LACP can automatically manage link aggregation, and in addition to active links, you can also configure backup links. When an active link fails, the backup link with a higher priority will become the active link, ensuring higher link reliability. A LACP group can have up to 16 member links.