[30305] in North American Network Operators' Group
Netflow Type 7 (was RE: bw usage?)
daemon@ATHENA.MIT.EDU (rdobbins@netmore.net)
Wed Jul 26 12:10:32 2000
Message-ID: <7BDBFDCDD02AD311AB2700104BC4F3F7B6640A@atshost001>
From: rdobbins@netmore.net
To: nanog@merit.edu
Date: Wed, 26 Jul 2000 09:11:43 -0700
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Does anyone know of a tool like Cflowd which will capture Netflow Type 7
stats? The only one I know of is the commercial product from Cisco; any
advice would be greatly appreciated.
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Roland Dobbins <rdobbins@netmore.net> // 818.535.5024 voice
-----Original Message-----
From: Alex [mailto:alex@nac.net]
Sent: Wednesday, July 26, 2000 8:23 AM
To: David M. Ramsey
Cc: nanog@merit.edu
Subject: Re: bw usage?
On Wed, 26 Jul 2000, David M. Ramsey wrote:
> For now I've cobbled together some crude software to regularly
> read SNMP port byte in/out counters from our switches, stashing
> the deltas in a DB for later reporting/analysis.
We do about the same thing, but we store absolute byte counts, relative
byte counts from the last measurement, and figure the kb/s; we also store
AdminStatus and OperStatus for SLA purposes.
> I'm concerned that the data is misleading, though, in that it will
> include LAN broadcast traffic. Also, customers end up paying
> for other bandwidth that they did not want or induce, like network
> scans, etc. (tough luck?).
Exactly, tough. If they use the bandwidth, then they should pay for the
bandwidth.
> We've considered implementing unique customer VLANS to separate
> customer broadcast domains, but it seems like that'd be a pain,
> would eat up IP addresses, and possibly tax our routers with all of
> the ISL/VLAN stuff?
We do that; it's unwise to have everyone on the same VLAN, as some others
have demonstrated.
