Hardware capture platforms

Paul Jakma paul at clubi.ie
Fri Aug 1 09:46:41 CDT 2008


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 at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
lisp, v.:
 	To call a spade a thpade.




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