We want to work in more Cisco BGP reporting in Scrutinizer NetFlow Analyzer and I need some help.  I need some NetFlow packet captures with BGP information. Can you send me one?

If you are not familiar with NetFlow BGP Next Hop the Cisco documentation says it best:

The NetFlow Border Gateway Protocol (BGP) Next Hop Support feature lets you measure network traffic on a per BGP next hop basis. Without the NetFlow BGP Next Hop Support feature, NetFlow exports only IP next hop information (which provides only the next router); this feature adds BGP next hop information to the data export.

The NetFlow BGP Next Hop Support feature lets you track which service provider the traffic is going through. This functionality is useful if you have arrangements with several other service providers for fault-protected delivery of traffic. The feature lets you charge customers more per packet when traffic has a more costly destination—you can pass on some of the cost associated with expensive trans-oceanic links or charge more when traffic is sent to another ISP with which you have an expensive charge agreement.

This feature uses only the NetFlow Version 9 export format for its data export.

Commands to enable BGP NetFlow exports:

[table id=5 /]

The command to enable it looks like this:

Router> enable
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# ip flow-export Version 9 origin-as bgp-nexthop
Router(config)# end
3w1d:%SYS-5-CONFIG_I: Configured from console by console
Router# exit

A word on Reporting
Just because you are exporting BGP information to your NetFlow collector doesn’t mean that your NetFlow reporting front end will allow you to report on the data. This of course is the case unless you are using a best at NetFlow Analyzer.

If you can help us out by sending over a capture, that would be great. Any information on what you want in the report would be very useful as well. I know there are some talented NetFlow experts out there with some insightful information to share.

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Kelly Kading

Kelly Kading is the Regional Manager for the Northeast US here at Plixer. Kelly strives to deliver the best customer experience possible. He enjoys building relationships with his customers and wants to find the solution to best meet their needs. When not in the office, Kelly tries to always be in the outdoors. His favorite hobbies are hiking, snowshoeing, traveling and generally just being outside!


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