| Description | This article describes how to configure an LACP interface between MCLAG peers on FortiLink mode vs a third-party switch. |
| Scope | MCLAG on FortiLink mode. |
| Solution |
An LACP interface is going to be configured between two MCLAG peers controlled by a FortiGate and one Cisco 2950. A link between Core-1 port1 and Core-2 port1 is going to be connected with a Cisco 2950 port FastEthernet 0/23 and 0/24.
Go to wifi & Switch Controller -> FortiSwitch Ports -> Trunk. On this page, write the trunk name, select MCLAG enable (this section is going to enable MCLAG on this trunk). In Mode, select active LCAP and select FortiSwitch ports that are going to participate in trunk. In this case, port1 Core_1 and port1 Core_2.
Select Apply, and Ok. Once trunk interface is configured, native VLAN and allowed VLANs need to be configured. Interfaces must have the same VLANs.
On the Cisco Switch, this is the config applied:
Validating the trunk status can be done with the 'diagnose switch-controller switch-info mclag peer-consistency-check' command:
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