Auto-negotiation issues with the Sensor might result from nonconforming implementation, hardware incapability, or software defects.
Generally, if the switch used with the Sensor adheres to IEEE 802.3u auto-negotiation specifications and all additional features are disabled, auto-negotiation should properly negotiate speed and duplex, and no operational issues should exist.
Problems might arise when vendor switches/routers do not conform exactly to the IEEE specification 802.3u.
Vendor-specific advanced features that are not described in IEEE 802.3u for 10/100 Mbps auto-negotiation (such as auto-polarity or cabling integrity) can also lead to hardware incompatibility and other issues.