Hubs and ethernet speeds

I just replaced an old D-Link 10mb hub with a newer Linsys 100mb hub and I
have a couple of questions just out of curiosity:

Will all the 100mb capable machines connected to the hub re-negotiate and
speed up when power is applied to the hub or do the individual machines
need to be re-booted?

I know that older hubs all negotiated down to the lowest speed - is that
still generally true? I have a couple of connected stations with 10mb
adapters still.

All academic - the D-Link failed and the Linksys was what I had that worked
so what I get I get but I’m curious.


Will Honea

Autonegotiation should happen automatically, on power-up or plugin. It should negotiate to the highest speed supported by both parties. That’s should, but of course sometimes things go wrong. As long as it works, you’re fine. BTW, it would be a switch, not a hub. A hub can have only one packet going through at a given time.

ken yap wrote:

>
> Autonegotiation should happen automatically, on power-up or plugin. It
> should negotiate to the highest speed supported by both parties. That’s
> should, but of course sometimes things go wrong. As long as it works,
> you’re fine. BTW, it would be a switch, not a hub. A hub can have only
> one packet going through at a given time.

Switch/hub/router - I have generally treated these components as black box
functions. Being a shut-in for a few days I got sidetracked and started
looking at the hardware design of all theses. Sure makes that $39.95 “blue
box” look like a bargain! We both agree - I put signals in, they go out to
where I want and I get replies back - mission accomplished so get on with
things.


Will Honea

Confusing a hub and a switch is mostly harmless, but confusing them with a router is likely to hinder one’s understanding of networking. They work at different levels of the network stack.

ken yap wrote:

>
> Confusing a hub and a switch is mostly harmless, but confusing them with
> a router is likely to hinder one’s understanding of networking. They
> work at different levels of the network stack.

Sloppy wording - attention to detail is inversely proportional to age.
Thanks for the comments. Just as a test, I checked a large file transfer
with and without the 10mb connections. Made a small but measurable
difference so overhead is likely eating more throughput than hardware. I
found several tx905 cards in the junk box so the issue is moot. Being a
packrat has it’s advantages :wink:


Will Honea

On Fri September 11 2009 11:54 pm, Will Honea wrote:

<snip>
>
> Sloppy wording - attention to detail is inversely proportional to age.
<snip>
Honea;
Can you prove this! I provide a counter example.

P. V.
“We’re all in this together, I’m pulling for you.” Red Green

PV wrote:

> On Fri September 11 2009 11:54 pm, Will Honea wrote:
>
> <snip>
>>
>> Sloppy wording - attention to detail is inversely proportional to age.
> <snip>
> Honea;
> Can you prove this! I provide a counter example.

Only anecdotally. I just spent several days with a group of my AF Academy
classmates and it was easy to see the lack of attention to detail in the
war stories that abounded - we all flew exciting, perfectly executed
missions and never dropped a bomb off-target. After 50 years of these
gatherings this disregard for details is quite obvious :wink:


Will Honea