Please suggest a very simple hub

Please suggest a very simple hub
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Please suggest a very simple hub =?ISO-8859-1?Q?Tom=E1s_=D3_h=C 03-28-2008
Posted by glen herrmannsfeldt on March 28, 2008, 7:32 pm
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P.Schuman wrote:
> Robert Redelmeier wrote:

>>>Also, I'm playing around with networking here at home and I'm looking
>>>for a very simple 100 Mbps hub, with about four ports maybe. I've got
>>>switches but it's a hub I want so that I can listen to all the
>>>traffic.

Say 'repeater' instead of 'hub' to be sure you get the
right thing.

>>100 hubs are rather rare, outnumbered by switches and 10 hubs.

> I do the same thing - I look on eBay for old 5 port 10mbps hubs
> for the purpose of sniffing a network problem.

> I don't think the 100mbps standard has a "hub",
> I think they are all "switches".

Again, 'repeater' not 'hub'.

I used to have a 3com 3C250-TX/I which is definitely a 100baseTX
(only) repeater. It does not run 10baseT and has no
switch or bridge function. They are available on eBay reasonably
priced, though watch the shipping charges.

Do not buy the 3C250-T4, way overpriced on eBay. There is
one now for $220.02, over priced by a factor of about 11000.
(I have some T4 transceivers, but no repeaters to go
with them.)

-- glen


Posted by Rich Seifert on March 29, 2008, 1:28 pm
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> Robert Redelmeier wrote:
> >> Also, I'm playing around with networking here at home and I'm looking
> >> for a very simple 100 Mbps hub, with about four ports maybe. I've got
> >> switches but it's a hub I want so that I can listen to all the
> >> traffic.
> >
> > 100 hubs are rather rare, outnumbered by switches and 10 hubs.
> >
>
> I do the same thing - I look on eBay for old 5 port 10mbps hubs
> for the purpose of sniffing a network problem.
>
> I don't think the 100mbps standard has a "hub", I think they are all
> "switches".

While switches are clearly more popular today, the Fast Ethernet
standard does specify and allow repeater hubs, and many were sold
commercially during the early days of Fast Ethernet.


--
Rich Seifert Networks and Communications Consulting
21885 Bear Creek Way
(408) 395-5700 Los Gatos, CA 95033
(408) 228-0803 FAX

Send replies to: usenet at richseifert dot com

Posted by DLR on March 29, 2008, 7:38 pm
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P.Schuman wrote:
> Robert Redelmeier wrote:
>>> Also, I'm playing around with networking here at home and I'm looking
>>> for a very simple 100 Mbps hub, with about four ports maybe. I've got
>>> switches but it's a hub I want so that I can listen to all the
>>> traffic.
>> 100 hubs are rather rare, outnumbered by switches and 10 hubs.
>>
>
> I do the same thing - I look on eBay for old 5 port 10mbps hubs
> for the purpose of sniffing a network problem.
>
> I don't think the 100mbps standard has a "hub", I think they are all
> "switches".
> I ran into that same problem, with the simple 10/100 device not repeating to
> all ports.

Hey. I have one. A 16 port 100 hub. A real honest to goodness hub. Plus a 10/100
bridge. I haven't turned it on in about 6 or more years. I keep them on the
shelf "just in case" and to annoy my wife.

David

Posted by P.Schuman on March 28, 2008, 5:23 pm
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Tomás Ó hÉilidhe wrote:
> Instead of getting a RJ45 splitter, (which I know now won't work), are
> there any very simple two-ports hubs? What's the most simple hub
> device on the market?

there are tons on the market - where are you located ?
What are you really trying to do ???

I've never seen anything less than 5-ports...
Usually 4 normal ports, + 1 port that plugs into an upstream hub/switch
that internally takes care of the TX/RD wiring crossover between upstream
hubs,
or - some have all 5 ports can handle the crossover issue.



Posted by DLR on March 29, 2008, 7:41 pm
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Tomás Ó hÉilidhe wrote:
> Instead of getting a RJ45 splitter, (which I know now won't work), are
> there any very simple two-ports hubs? What's the most simple hub
> device on the market?

Again, since you can now buy a chip to do most everything there's no market for
a 2 port chip, 3 port chip, etc... So there are 5 port chips and 8 port chips
for the low end. If you notice router/switch/wireless combinations have 4 switch
ports and stand alone units are 5 ports. Which leads me to believe most of the
router chip sets have a WAN port and 2 LAN ports. And if they are used in a non
wireless router they just don't use the extra LAN port on the router.

David

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