Connecting a gigabit switch to a 100 Mbps switch

A gigabit switch can be connected to a 100Mbps network cable, but only 100Mbps can be used on this line, and it cannot reach gigabit level. (Unless cross-over cables are needed between devices. )Several factors can cause your Gigabit Ethernet connection to throttle down to 100Mbps. I've placed it in a central (ish) location in my apartment and have cat5e cables laid in all the rooms. So, I recently bought a house which happens to already have. This guide will walk you through the most frequent culprits behind this performance drop and provide a clear, actionable troubleshooting plan to get your network running at its intended Gigabit speed. Uncovering the Root Causes of Speed Throttling ​ When a Gigabit connection fails to achieve its. This may not be the most common cause of a gigabit card only connecting at 100mbps, but it's easy to check. [pdf]