Keep getting 10M speed, if the port configure manually to 100/1000M the port will show down.
Advice user to try to use different cable if they are getting better speed, if still same issue, try different port. After user try different port, it working fine.
There is many ways will cause this issue,
Example : Check on the logs before troubleshooting, The duplex setting have to be match, speed have to be match, the cable is supported to 100/1000M (CAT5,CAT6), the port itself have to support to 100/1000M(Fe/Gi port).