I am currently managing a large datacenter spine-and-leaf topology. On our leafs, we use stacked 3750-X switches.
I want to know how much bandwidth is currently going across the stack links (currently 6 switches in the stack, about to be 8). We currently use 10GB uplinks to our spine using a SM module (only two links currently up to the spine from different switches in the stack). I can look at the total available bandwidth (which is 32Gbps) but not what is being used. I tried to graph the stack links in Cacti but nothing is showing up using the standard graphs.
Is there a way to tell current bandwidth or dropped frames due to oversubscription? Can I graph this is Cacti to monitor for a period of time to tell peak usage?
Not finding much information on Google right now, thanks.
-Aaron
Best Answer
I do not know a direct way to show the exact bw utilization per stack port, however you can show the total number of frames sent by each stack member to the stack ring by using the command "show switch stack-ring activity", you can also know the overall utilization of the stack-ring using the command "show controllers utilization" but it wont show you the percentage of each stack port.
Reference: Catalyst 3750 Command Reference