Enabling Netflow on Production 6500 Core switch

[mudassar.khan]

Hi All,

I am looking for a little expert advise regarding Cisco Netflow. For monitoring I need to enable Netflow feature on 6500 core switch or 6500 load balancer with CSM module installed, but I am just concern about the CPU hits on the devices. we are not using any dynamic routing protocols. Can someone please advise how will it effect on the local resources when using Netflow? Is it fine if I enable this feature on these devices in production?

Thanks in advance,

[brett.harding]

Hi Mudassar,

Enabling netflow will not have a major impact on CPU or memory but you will want to keep a close eye on the switches TCAM utilisation. Features like  netflow,  TCP intercept and WCCP can use resources from “NetFlow TCAM Table”.

Use the "show mls netflow table-contention detailed" command to monitor TCAM utilisation.

Regards

Brett