I've setup a network monitoring using Observium but I see something really strange, on 3 buildings (2 Production laboratories and 1 office) (There are no servers connected on those switchs), the network is more loaded at night than at day .
Here are the graphs (one per building, this is the global traffic on the whole switch) :
On those swith are connected :
- Desktops (should be shutdown at night)
- Wyse client (same thing)
- Environment monitoring
Have you any idea of what can this be ?