After installing new Nighthawk WiFi Router(R6900P) speed dropped to 10/100 mb out of switch from 1 G

After replacing and installing the new router I noticed that my speed dropped significantly on my eithernet coming from the new router.  I njormally have close to a gig of download and upload speed since I have fitber optic 1 GB1GB service.  My internet service coming into the router was tested and is at 1GB,  The Wifi signal emitted is also well above 100 MB.  I also tested the ether net ports and I found that the input from the router into a switch is good, but coming out of the switch that goes into a switch it drops in speed way down.  The indicator at the output from the router also is lit amber and if I move it to another port off the router the indicator of the port the output cable is moved to follows.  If I connect another ethernet to the router output and go directly into my PC the light turns white and the speed is back up to 1 GB.   So could this be the switch causing the issue?  The swithc is an 8 port unmanaged switch with currently 4 outputs and all 4 outputs from the switch speed have been degraded to less than 100 MB.   My main concern is that the router does show the 10/100 MB amber indicator so want to ensure it is not the new router and I may need to buy a new switch.  The current switch is 2 yrs old and have never had an issue with speed coming through it until now.