[187957] in North American Network Operators' Group
Re: sFlow vs netFlow/IPFIX
daemon@ATHENA.MIT.EDU (Saku Ytti)
Mon Feb 29 14:06:28 2016
X-Original-To: nanog@nanog.org
In-Reply-To: <432E6F5B-E2C3-4E36-93CA-E51125FDE4DA@gmail.com>
Date: Mon, 29 Feb 2016 21:06:23 +0200
From: Saku Ytti <saku@ytti.fi>
To: Phil Bedard <bedard.phil@gmail.com>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On 29 February 2016 at 17:40, Phil Bedard <bedard.phil@gmail.com> wrote:
> It would be interesting to get some data from vendors on what the actual =
limitation is. I know with some new platforms like the NCS 55XX from Cisco=
(BRCM Jericho) it has limited space for counters, but I don=E2=80=99t know=
if that contributes to its minimum 1:8000 Netflow sampling rate. The new =
PTX FPC supporting Netflow has a minimum of 1:1000.
Are they are doing netflow in HW at all? To me it sounds like they
might be doing it in LC CPU and HW is only doing sampled punting.
Which would explain the performance hit.
I would be very surprised if Jericho could do netflow in HW. And I'm
100% sure PE chip can't do netflow in HW.
--=20
++ytti
