nanog mailing list archives
Re: Hardware capture platforms
From: Warren Kumari <warren () kumari net>
Date: Thu, 31 Jul 2008 13:04:20 -0400
On Jul 31, 2008, at 12:31 PM, Jay R. Ashworth wrote:
On Wed, Jul 30, 2008 at 02:47:11PM -0400, Jon Kibler wrote:Hubs are still available that are REAL hubs. I got 4 netgears about a year ago and they are still available.However, there is a problem with your specification: No hub (that I amaware of) can do 1Gbps. All hubs are 10/100 AFAIK.
Ok, so I guess what I am speaking is not strictly a hub, it is a non- learning bridge (single collision domain per port, full duplex, etc). There used to be a bunch of devices sold like this -- there were a few really cheap chipsets (AFAIR, Vitesse SparX VSCsomething was one of them -- basically a standard switch chipset that they shaved a few cents off because there was no learning logic / memory) that many people used in cheap "hubs"... I still have some of these somewhere and will rip the lid off to figure out exactly what it was so I can get some more...
And, note carefully: some "dual-speed hubs" are actually a 10BT hub anda 100BT hub *with a switch between them*. I forget which brand I caught this on, but it bit me a couple of years back. Which speed cable you plug in determines which hub you're talking to.
I see your weird hub story and raise you one:I went along to one of my wife's clients to help lug a printer up the stairs... We get it on the desk and I go to plug in the Ethernet port -- I follow some cables and find this small white switch jammed behind a photocopier -- I pull it out and it has, emblazoned in large red letters on the front, "10/100 Hub with Switch" -- this was back in the day when switches were still cool... I turn it around, and on the back there is... a switch, one side is marked "10M" and the other is marked "100M"... After I stopped laughing I tested it, and sure enough, its a standard hub, and you can make the ports either run at 10Mbps or 100Mbps by flipping the switch... I *really* wish I had replaced and kept it...
W
Yes, it's weird. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink comDesigner The Things I Think RFC 2100 Ashworth & Associates http:// baylink.pitas.com '87 e24 St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274Those who cast the vote decide nothing. Those who count the vote decide everything. -- (Josef Stalin)
--Do not meddle in the affairs of wizards, for they are subtle and quick to anger.
-- J.R.R. Tolkien
Current thread:
- Hardware capture platforms John A. Kilpatrick (Jul 29)
- Re: Hardware capture platforms Jared Mauch (Jul 29)
- Re: Hardware capture platforms Christian Koch (Jul 29)
- Re: Hardware capture platforms Christopher Morrow (Jul 29)
- Re: Hardware capture platforms Network Fortius (Jul 29)
- Re: Hardware capture platforms James Pleger (Jul 29)
- RE: Hardware capture platforms Darryl Dunkin (Jul 29)
- Re: Hardware capture platforms Warren Kumari (Jul 30)
- Re: Hardware capture platforms Jon Kibler (Jul 30)
- Re: Hardware capture platforms Jay R. Ashworth (Jul 31)
- Re: Hardware capture platforms Warren Kumari (Jul 31)
- Re: Hardware capture platforms Jon Meek (Jul 31)
- Re: Hardware capture platforms Lynda (Jul 30)
- RE: Hardware capture platforms Matthew Huff (Jul 30)
- Re: Hardware capture platforms Sam Stickland (Jul 31)
- Re: Hardware capture platforms Jared Mauch (Jul 29)
- Re: Hardware capture platforms Larry J. Blunk (Jul 30)
- Re: Hardware capture platforms Joel Jaeggli (Jul 31)
- Re: Hardware capture platforms Leon Ward (Jul 30)
- Re: Hardware capture platforms Juuso Lehtinen (Jul 31)
- Re: Hardware capture platforms Leon Ward (Jul 31)
- Re: Hardware capture platforms Nickola Kolev (Jul 31)