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Configuring NetFlow for BGP

This document outlines the steps to configure NetFlow for BGP flow export with an ObserveOps Flow Explorer.

Configuration Steps​

Enable BGP Routing​

Enter global configuration mode and activate the BGP routing process:

router bgp <as-number>

Designate a network as local to the autonomous system:

network <network-number> [mask <network-mask>] [route-map <route-map-name>]

Configure BGP Neighbors​

BGP supports two neighbor types: internal (same autonomous system) and external (different autonomous systems). External neighbors typically share adjacent subnets; internal neighbors can exist anywhere within the same autonomous system.

In router configuration mode, specify a BGP neighbor:

neighbor {<ip-address>|<peer-group-name>} remote-as <as-number>

To configure a BGP router in AS 109 with local networks and remote neighbors, use the following configuration:

router bgp 121
  network 154.1.0.8
  network 154.1.0.87
  neighbor 154.13.0.8 remote-as 167
  neighbor 154.1.54.8 remote-as 121
  neighbor 154.1.45.8 remote-as 99

Include AS Information in NetFlow Exports​

Set the NetFlow export destination to the Motadata server:

ip flow-export destination {<hostname>|{MOTADATA_SERVER_IP}} 2055

Enable NetFlow export with BGP AS information (choose either peer-as or origin-as, not both):

ip flow-export <version> [peer-as | origin-as]

Review needed: Source documentation references export version 5 or 7. Verify which version is supported on your device and required by ObserveOps.

After completing the configuration, navigate to Menu > Flow Explorer and select Explorer to view the active flow data.