[106532] in North American Network Operators' Group
Re: Hardware capture platforms
daemon@ATHENA.MIT.EDU (Paul Jakma)
Mon Aug 4 16:06:32 2008
Date: Fri, 1 Aug 2008 15:46:41 +0100 (BST)
From: Paul Jakma <paul@clubi.ie>
To: Jon Kibler <Jon.Kibler@aset.com>
In-Reply-To: <4890B72F.4070303@aset.com>
Mail-Copies-To: paul@jakma.org
Mail-Followup-To: paul@jakma.org
Cc: nanog@merit.edu
Errors-To: nanog-bounces@nanog.org
On Wed, 30 Jul 2008, Jon Kibler wrote:
> However, there is a problem with your specification: No hub (that I am
> aware of) can do 1Gbps. All hubs are 10/100 AFAIK.
GigE is PtP at the physical-layer by the IEEE 802.3ad specification.
It's just not possible to have a dumb, GigE hub. You have to have a
switch that can be told to L2-forward everything to one or more ports
(e.g. through a port-mirroring feature, or by disabling MAC
learning).
Also, though probably not terribly relevant, various switches have
various bugs/malfeatures that cause them to consume certain kinds of
frames rather than forward them (e.g. consuming all or certain kinds
of ISO frames).
regards,
--
Paul Jakma paul@clubi.ie paul@jakma.org Key ID: 64A2FF6A
Fortune:
lisp, v.:
To call a spade a thpade.
