This article explains how to resolve the Faulted LACP negotiation error when trying to configure NIC Teaming (LACP) between a Datto Switch and Windows Server 2012 R2.
By default, Datto switches are set to slow time-out. LACP requires the server and switch to have the same time-out setting. If the settings do not match, you will see a Faulted LACP negotiation error in the Windows NIC Teaming interface.
Microsoft has published this article with a hotfix that allows you to enable slow time-out on the server.
This has been known to work when the following variables match:
- Teaming mode: LACP
- Load balancing mode: Dynamic