Hello Giovanni
There are various options to deal with saturated links, and what you can do about them can also vary. You can shut them down, or you can introducing shaping or policing to deal with congestion. Solutions can include may things such as QoS, or using an EEM script, or even SNMP.
Can you tell us a little more about what you want to achieve so that we can more specifically suggest solutions?
I hope this has been helpful!
Laz