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Description:

Due to higher bandwith or redundancy needs some scenarios require several switch ports to be combined. This can be implemented with the protocol LACP (Link Aggregation Control Protocol).

This article describes how to configure an LACP Trunk on an XS-xxxx series switch.

In contrast to a Static Trunk the feature LACP supports a dynamic negotiation, thus enabling the Trunk to remain active when a line fails.

Requirements:

LANCOM aggregation switches of the XS-xxxx series (e.g. LANCOM XS-5110F, LANCOM XS-5116QF and XS-6128QF)
LCOS SX as of version 5.00 RU2 (download latest version)
Any Web browser fpr accessing the webinterface

Procedure:

Conduct the following steps on both switches, which are to be connected with each other via an LACP Trunk.

1) Connect to the webinterface of the device, go to the menu Switching → Port Channel / LAG → Summary, select an unused Port Channel (in this example ch1) and click Edit

LANCOM Support Knowledge Base > Configuring an LACP Trunk on an XS or GS-45xx series aggregation switch > 1.png

2) Modify the following parameters and click Submit:

Port Channel Name: Enter a descriptive name if necessary (in this example LACP-Trunk1).
Static Mode: Select the option Disable in order for LACP to be used. The option Enable sets up a Static Trunk.
Port List / Members: Add the desired interfaces from the Port List to the Members group via the arrow symbols.

The parameter STP Mode (Spanning Tree Protocol) as well as the feature STP (Switching → Spanning Tree → Switch) are active by default. Therefore the cables can be plugged beforehand without risking a loop if STP is also active on the LACP partner (e.g. another XS-xxxx switch).

LANCOM Support Knowledge Base > Configuring an LACP Trunk on an XS or GS-45xx series aggregation switch > 2.png

3) With the configuration complete, click on Save Configuration in the top right-hand corner to save the configuration as the boot configuration.

The start configuration is retained even if the device is restarted or there is a power failure.

LANCOM Support Knowledge Base > Configuring an LACP Trunk on an XS or GS-45xx series aggregation switch > 3.png