8-3. NetFlow Data Export

  • Traffic statistics from Layer 3 switching can be gathered and sent to an external application for collection and analysis. This is done through the NetFlow Data Export (NDE) facility.

  • Switches using MLS for Layer 3 switching can send data about expired flows using NDE. This is a natural extension of MLS because the switch uses flow cache data.

  • Switches using CEF do not inherently use a flow cache, and therefore can't offer statistics through NDE. The Catalyst 6000 PFC2/MSFC2, however, keeps a NetFlow cache independent of the CEF process, strictly for exporting flow data with NDE.

  • NetFlow data can be sent as several versions:

    - NDE version 1— Used in legacy systems; data record includes specific information about the IP traffic ...

Get Cisco® Field Manual: Catalyst® Switch Configuration now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial