mwilliamsess
IS-IT--Management
I calculated the broadcast percentage on all of switches in our network. We have about 30 3Com switches. According to my caculations most of them are averaging 50% - 80% broadcast traffic except for our 2 layer 3 switches with have about 2% broadcast. I took the total amount of packets on each port and the total amount of broadcast on each port and divided giving me this percentage. I am going to try to further explain our addressing scheme better than the previous post. All of our switches are in the ip range of 10.10.33.0 255.255.255.0. We are pushing 10.10.34.0 10.10.35.0 10.10.36.0 through DHCP to workstation, printers, and statics for servers. We are using a total of 4 subnets and they are routed through 2 layer 3 switches we have that are on opposite ends of our campus. So pretty much on every switch that we have you have workstations connected to it that on are each of the subnets depending on which address they get through the DHCP lease. Our servers have a static address assigned from each of the subnets. It seems to me that on each switch it is getting broadcasts from 4 different subnets.
This is a suggestion that I have. Take 1 subnet and use for our switches and servers. We have 2 layer 3 switches that are on opposite ends of our campus that basically splits it in half. Take 1 subnet and put it behind the layer 3 switch on the back of campus. Take 1 subnet and put it behind the layer 3 switch on front of campus. This way every device that is connected to a switch is on the same subnet and the layer 3 switch will provide the routing between the subnets allowing the workstations to access the servers which are on a different subnet. I just thought this makes more sense than having for example 3 workstations connected to the same switch but on different subnets. Could this be causing all the broadcast traffic?
This is a suggestion that I have. Take 1 subnet and use for our switches and servers. We have 2 layer 3 switches that are on opposite ends of our campus that basically splits it in half. Take 1 subnet and put it behind the layer 3 switch on the back of campus. Take 1 subnet and put it behind the layer 3 switch on front of campus. This way every device that is connected to a switch is on the same subnet and the layer 3 switch will provide the routing between the subnets allowing the workstations to access the servers which are on a different subnet. I just thought this makes more sense than having for example 3 workstations connected to the same switch but on different subnets. Could this be causing all the broadcast traffic?