4 Replies Latest reply on Dec 29, 2009 10:08 AM by Andy McBride

    Netflow Servers and Bandwidth Concern

      I'm running Orion 9.1 with netflow 3.1(will upgrade to 9.5 and netflow 3.5) on a Dual-Core ADM Opteron 2.8GHz, 4.00G of RAM server.  The standby orion will be configure later for high availability.  The sql server is on vmware and has the same spec with Orion server.

      Orion currently monitor about 76 applications. 

      Netflow will be monitor about 3600 remote wan Cisco routers

      Orion server and sql server locate at the main datacenter

      1. How much bandwidth does Netflow use to collect data from remote routers/switches?  Netflow admin guide does not give much detail on how much bandwidth and min/max bandwidth recommandation.  

      2. Does my server orion enough horse power or I need more ram or better processor?  Do I need a better server?

      3. Sql server(the same spec with Orion server) capable handle the data collecting workload for 3600?

      4. What're some of the way to optimize Netflow bandwidth over on wan Cisco routers/switches?

      Can someone please share your Orion/Netflow and Sql servers spec and how many monitored applications and routers.

      THanks 

        • Re: Netflow Servers and Bandwidth Concern
          Andy McBride

          Hi Joey,

          I can help out with some guidelines and experience.

          1. How much bandwidth does Netflow use to collect data from remote routers/switches?  Netflow admin guide does not give much detail on how much bandwidth and min/max bandwidth recommandation.  

          I believe Cisco says that v9 and v5 exporters will use about 1.5% to 3% of the monitored interfaces bandwidth. The exporter traffic at any point is proportional to the number of active conversations and the interface bandwidth, so it varies on any given interface at any time.

          2. Does my server orion enough horse power or I need more ram or better processor?  Do I need a better server?

          3600 exporters is a lot to monitor. I would get the best hardware you can. The SQL server cannot be on a VM, this will cause huge performance issues.

          3. Sql server(the same spec with Orion server) capable handle the data collecting workload for 3600?

          Again, the bigger the better. See the tips posts about using dedicated storage for the SQL server. The specified item was not found.

          The specified item was not found.

          4. What're some of the way to optimize Netflow bandwidth over on wan Cisco routers/switches?

          Not sure exactly what you are asking here. You could deploy sampled netflow on the routers and switches to minimize the load on all the systems.

          Hope this helps