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Forums » Equipment Support » Hardware By Brand » Cisco » [Config] NetFlow Ingress/Egress/Both?
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[CCNA] Subinterface on 871w (Advanced IP Services) »
« [HELP] Prepending AS path in Multihomed setup  

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Re: [Config] NetFlow Ingress/Egress/Both?

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NetFlow data is only collected on packets comming into an interface.

Therefore, if you want to measure traffic in both directions you need to enable NetFlow collection on your routers LAN and WAN interfaces.

It really depends on how accurate your statistics need to be.

Consider the attached diagram.

NetFlow enabled at each of the red dots will collect statistics for traffic coming from each LAN. In the case of the T1 link, it has been enabled on router access2 to preserve bandwidth on the T1.

NetFlow enabled at each of the purple dots will collect statistics for traffic comming into your network.

This way you can account for all traffic between internal hosts, and to/from the Internet.
permalink · 2007-10-27 03:28:46 · Print · Reply to this
Forums » Equipment Support » Hardware By Brand » Cisco[CCNA] Subinterface on 871w (Advanced IP Services) »
« [HELP] Prepending AS path in Multihomed setup  

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