I have a catalyst 1900 switch which has been working for years without any issues. It is connected to a single subnet on one side (10 machines all on same class C) and to a service provider switch on the other.
Recently the ftp speeds from machine to machine on the inside became very slow (20K) on a 10M port, slightly faster on the 100M port.
The external (internet side) to internal machines however has not changed and is still fast as ever.
Has anyone ever come across this sort of problem and if so where could I start to troubleshoot it ?