We currently have Netflow configured on our HQ router and capturing Ingress / Egress Netflow on all interfaces. We have a 150MB to our DR site. So data traveling from our servers (internal) to the DR site will be captured twice... (take a 10MB example):
10MB leaves Server --> 6509 --> 10MB Ingress on Inside interface --> 10MB Egress on Outside interface. Therefore, according to our monitoring software, the Outside interface will show 20MB of traffic.
We use Whatsup Flow Monitor. When we view the Interface utilization, we will often see the interface way over 100%. I realize we need to turn off Ingress or Egress strategically to make sure we only use one data stream, but what are other people doing to monitor the interfaces of their devices?
We are using Netflow version 5. Would version 9 do anything to solve this isse? Or, with IOS v15 and Flexible Netflow, will this type of scenario be avoided with the use of templates?
Any thoughts will be appreciated.