[c-nsp] Configuring Netflow in C6500

[Kim Onnel]

I dont know about exporting to NAM, but there are some basics about Netflow 
that you need to know,

you probably dont have dCEF, read about it, CEF must be running for netflow 
to run, netflow was originally as switching method, read what are switching 
methods, how it went from software switching to CEF and why you could some 
flows not in Hex 

and its supposed to enhance switch performance because, a slight increase in 
CPU, but you will never feel it, determine what u want to do with netflow 
and then come to ask.

how to configure sampling if your netflow TCAM is full, changing aging and 
expiring timers, do you need all the fields in the flow or not, all that 
stuff, 

get the NDE paper from cisco.com <http://cisco.com>




On 5/25/05, Todd, Douglas M. <DTODD at partners.org> wrote:
> 
> We have enabled netflow on our boxes by doing the following:
> 
> On the interface you want the flow extracted from:
> You can use the ip route-cache flow
> Then you use the flow-export command (globally) and define the destination 
> and
> the destination port.
> I would also use the flow-export source to specify your source interface. 
> If you
> want to keep track who is sending you the flow.
> 
> Thus you would have;
> 
> Int gi1/1
> Ip route-cache flow
> Exit
> !
> Ip flow-export source lo0
> Ip flow-export destination 1.1.1.1 <http://1.1.1.1> 2001
> 
> Just some ideas.
> 
> >-----Original Message-----
> >From: cisco-nsp-bounces at puck.nether.net
> >[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ruben Montes
> >Sent: Wednesday, May 25, 2005 11:55
> >To: cisco-nsp at puck.nether.net
> >Subject: [c-nsp] Configuring Netflow in C6500
> >
> >Hello,
> >
> >I want to configure Netflow in a C6500 with sup720, PFC3 and
> >MSFC3 with IOS 12.2(18)SXD2 to send the export information to
> >a NAM. I've been reviewing some documention but it is not very
> >clear about what is supposed I should configure. Can I enable
> >mls netflow during working hours or should I take any
> >precaution? Netflow is only a method of gathering flow data
> >isn't it? I assume it wouldn't affect the switching method the
> >device is using (CEF,dCEF, etc): is that correct?
> >CAn anyone help me?
> >
> >Thanks in advance,
> >
> >Ruben
> >_______________________________________________
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> >
> 
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