Adrian,
thanks a lot for your input.
I have Cisco ME 6524 running IOS Version 12.2(33)SXH1 and then later will be
collecting sflows from some Foundry equipment.
I guess I'll preemptively check the IOS for netflow bugs.
thanks again,
Alban
On Mon, Apr 7, 2008 at 3:17 PM, Adrian Popa <[EMAIL PROTECTED]>
wrote:
> Hello,
>
> From personal experience I can say that nfsen is excellent in this matter.
> The only problem you might have is incorrect AS number reporting from your
> routers.
>
> I've tried it with mostly 7600 series routers (and also a few 6509s) and I
> had mixed results. I would get a lot of records with flows that have
> source/destination ASes set to 0, even if the routes are learned through BGP
> and there are flows for the same routes that have the correct ASes set. Most
> of these problems were on certain IOSes on 6509s and 7606s, so in case this
> happens look for netflow IOS bugs.
>
> Oh, something else that might confuse you at first: on some 6509/7606
> routers you will get flows for all interfaces, not just for the interfaces
> that you configure to export.
>
> For filters, you can use src as = 9980 or dst as = 702. You can limit your
> query to source/destination interfaces based on snmp indexes (src if = 5 and
> dst if =33).
>
> Other than that, everything should work fine! :)
>
> Adrian
>
> On Mon, Apr 7, 2008 at 9:43 PM, Alban Dani <[EMAIL PROTECTED]> wrote:
>
> > How good is nfsen in using netflow/sflow to get bgp related data based
> > on AS number and prefixes?
> > I would like to install it in order to help me with some traffic
> > engineering and peering decisions.
> > Will nfsen put me on the right path?
> >
> > thank you in advance,
> >
> > Alban
> >
> >
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