nanog mailing list archives
Re: Hardware capture platforms
From: Paul Jakma <paul () clubi ie>
Date: Fri, 1 Aug 2008 15:46:41 +0100 (BST)
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.
Current thread:
- Re: Hardware capture platforms Paul Jakma (Aug 01)
- Re: Hardware capture platforms Paul Jakma (Aug 01)
- <Possible follow-ups>
- Re: Hardware capture platforms Sam Stickland (Aug 08)
- Re: Hardware capture platforms Justin Shore (Aug 08)