flow analysis for juniper devices
Richard A Steenbergen
ras at e-gerbil.net
Sat Nov 13 21:17:55 CST 2010
On Sun, Nov 14, 2010 at 12:07:40PM +1000, Mehmet Akcin wrote:
> hey there
> any recommendations on freeware flow analysis tool which can show the
> flow not only per prefix basis but also show asn and/or country/region
> as well? Juniper only.
> feel free to contact on/off list.
Juniper's flow export is just like everyone else's (*), so any tool will
do the same thing. Country/region analysis would depend on third party
geolocation services, which have nothing to do with netflow. :)
(*) Well, except M/T/MX only support NetFlow v5/v8 in the free software
based sampling mode, you need an expensive services card and software
license to do v9 for some reason.
Oh and the sFlow on EX is actually pretty cripled when used for routing.
It's missing support for a bunch of important extended message tpes, and
doesn't fully populate all of the fields of the message types it does
send. For example you won't get any data on ASNs, nexthops, dest
ifindexes, or even netmasks of the src/dst route the flow matched,
making it pretty darn useless for a lot of tasks. It's functional if
you're just analyzing L2 networks at any rate.
Richard A Steenbergen <ras at e-gerbil.net> http://www.e-gerbil.net/ras
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