bandwidth capacity planning

[ciscomeo]

hi all,

how can i determine the total or average bandwidth my server is consuming? If I will be using sniffer what particular tool should I use?

I will be using this info for bandwidth capcity planning.

Thanks,
MAx

 

[jdeisenm]

Find the bottlenecks. Wan links. Lan links. Server processor/cpu/bus. Can you determine the usage of these? What kind of sniffer do you have? If you haven't purchased sniffer, get one that suupports the speeds and interfaces you need to monitor. What kind of network equipment do you have? Do the network switches or servers report any errors? Can the network equipment span/monitor a port?

 

[ciscomeo]

actually, My manager want to know the average network traffic the server is utilizing (from client to server) for there bandwidth capacity planning since the server will be move to the new data center. anyway, i am using sniffer-dss ver 4.6 and i have an agent installed on the same network where the server is located. I have cisco 6509 and span/monitor the vlan where the server is located. Currently I try using dasboard but having difficulty analyzing the report it provides under network. Can you advice me tool to use and basic procedures in getting this report?

here is how the server is connected.

server<-->xswitch<-->vlan ABC on 6509

here is how my agent is connected
dss-agent<-->6509 (span minitor vlan ABC)

 

[jdeisenm]

1 span the specific port to which the server connects 2 capture with no filters at various times. This can help you see what specific data (broadcast or otherwise) is hitting your server in addition to expected clients.

Use the "statistics" tab to see bytes per second, multiply by 8 to get bits per second. Additionally, the expert tab can help you break off individual sessions.

 

[tdelliott]

If you are trying to determine the utilization for a specific Client/Server application, you will need to filter on the client and server, then perform the the transactions between the two and determine the amount of traffic for specific transactions. Once you have that information you can use estimate the amount of traffic based on bytes per transaction with the number of transactions and number of clients.