How does a Cisco switch calculate interface utilization
Posted on 2011-03-25
I have a question about monitoring switchports. I am working with Cisco 3560 switches. but, I would suspect this would apply to all Cisco Switches and routers.
I have used various snmp monitoring tools. Currently I am using Cisco NetManager and Cisco Network Assistant. These tools display the interface utilization of a giving interface. However, it does it in percentages. So, my question is, how does it calculate that value?
Specifically, I have a gigabit interface that is running at 100mbps (becuase it's connected to a 100mbps device) and the switch is telling me that the interface is at %10 utilization, is that %10 of 1Gbps or %10 of 100Mbps?
Does the bandwidth command on the interface affect this calculation?