Description:

This article describes how to configure Link Aggregation (LACP) on a LANCOM switch via the LANCOM Management Cloud (LMC).

In contrast to a Static Trunk the feature LACP supports a dynamic negotiation, thus enabling the Trunk to remain active when a line fails. LANCOM Systems therefore recommends to always use LACP  when combining switch ports to a trunk.



Requirements:



Procedure:

1) Connect to the LMC, go to the menu Devices and click the switch Name (in this example GS-3510XP).

Screenshot of a technical dashboard displaying device status, names, models, and serial numbers, with options for activation codes and site filtering.

2) In the Overview click on a port, where Link Aggregation is to be configured (in this example port 9).

Image of a technical dashboard displaying device information, including name, project specifications, management status, last contact, uptime, CPU load, memory size, and port status.

3) Modify the following parameters and click Save:

  • Link Aggregation Group: Select a Link Aggregation Group (in this example LAG 1).
  • LAG mode: Select the option Configured, in order for Link Aggregation to be activated. 
  • Networks: Select the Networks to be transmitted via the link.
  • Untagged network: Optionally you can specify a network which is transmitted untagged. In this example the default setting No untagged network is used. 

The LAG modes No network and Deactivated must not be used, as both deactivate Link Aggregation as well as VLAN. 

Image of a network configuration interface displaying options for port link aggregation, PoE settings, and selected network groups.

4) Select an additional port (in this example port 10) and select the same Link Aggregation Group as for the first Link Aggregation port (see step 3). The remaining parameters are automatically set analogous to the settings made for the first Aggregation port. 

Click Save afterwards.

As an alternative you can also click the button Save and roll out. This skips the steps 5 - 7.

Screenshot of a network configuration interface showing options for monitoring selected ports, link aggregation group settings, and network configurations.

5) Go to the menu Devices, select the switch and click on the "three-dots" menu on the upper right corner. 

Image showing a technical dashboard with various device management options including status, name, model, serial number, site, IP address, license, configuration, and firmware details.

6) Click on Configuration roll out.

Screenshot displaying the 'ApplyAddin' option in a software configuration menu.

7) Acknowledge the prompt by clicking Roll out.

Screenshot of a configuration rollout confirmation dialog box with expert settings for devices.

8) If necessary, repeat the steps 1 - 7 for an additional switch, which is to be connected to the first switch via Link Aggregation (if this switch is also managed by the LMC).