100 mbps hub

100 mbps hub

[Raul A. Gallegos]

Hi.  I have or so I thought was a 100 mbps hub however my transfers 
within my lan seem to only be set at 10 mbps.  The nics to my knowledge 
are 10/100 type cards so I don't think that is the problem.  Is there a 
way to tell what settings to use or could my hub be going south?  I 
don't know the naem or model right off but it's just a 16-port hub with 
one uplink port where my cable modem plugs into.

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Re: 100 mbps hub

[Luke Davis]

Hubs, by their very nature, are slow.  That's just how they work.  If you
want 100MBPS, get a switch.  Now, of course, you shouldn't be getting
speeds *that* so, unless your measuring connections that have passed the
cable modem, which usually run only at 10 BPS.


On Sun, 27 Jul 2003, Raul A. Gallegos wrote:

> Hi.  I have or so I thought was a 100 mbps hub however my transfers
> within my lan seem to only be set at 10 mbps.  The nics to my knowledge
> are 10/100 type cards so I don't think that is the problem.  Is there a
> way to tell what settings to use or could my hub be going south?  I
> don't know the naem or model right off but it's just a 16-port hub with
> one uplink port where my cable modem plugs into.
>
>

Re: 100 mbps hub

[Glenn Ervin]

Routers seem to be very fast.
I can have 3 wireless and 3 wired computers connected to the LAN, and it is
amazing how fast I can transfer files back and forth.
Mine is a dLink7-13 router.


>From Glenn Ervin
This message originated from a computer which I do not usually use, and when
you reply, you may not be replying to my e-mail address, so my e-mail
address is:
GlennErvin@cableONE.net
.
----- Original Message -----
From: "Luke Davis" <ldavis@shellworld.net>
To: "Speakup Mailing-list" <speakup@braille.uwo.ca>
Sent: Sunday, July 27, 2003 6:50 PM
Subject: Re: 100 mbps hub


Hubs, by their very nature, are slow.  That's just how they work.  If you
want 100MBPS, get a switch.  Now, of course, you shouldn't be getting
speeds *that* so, unless your measuring connections that have passed the
cable modem, which usually run only at 10 BPS.


On Sun, 27 Jul 2003, Raul A. Gallegos wrote:

> Hi.  I have or so I thought was a 100 mbps hub however my transfers
> within my lan seem to only be set at 10 mbps.  The nics to my knowledge
> are 10/100 type cards so I don't think that is the problem.  Is there a
> way to tell what settings to use or could my hub be going south?  I
> don't know the naem or model right off but it's just a 16-port hub with
> one uplink port where my cable modem plugs into.
>
>

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Re: 100 mbps hub

[Luke Davis]

I don't think it's the router that is fast here, but the switch it
contains.  I could be wrong about that, but many small routers contain a
switch.


On Tue, 29 Jul 2003, Glenn Ervin wrote:

> Routers seem to be very fast.
> I can have 3 wireless and 3 wired computers connected to the LAN, and it is
> amazing how fast I can transfer files back and forth.
> Mine is a dLink7-13 router.
>
>
> >From Glenn Ervin
> This message originated from a computer which I do not usually use, and when
> you reply, you may not be replying to my e-mail address, so my e-mail
> address is:
> GlennErvin@cableONE.net
> .
> ----- Original Message -----
> From: "Luke Davis" <ldavis@shellworld.net>
> To: "Speakup Mailing-list" <speakup@braille.uwo.ca>
> Sent: Sunday, July 27, 2003 6:50 PM
> Subject: Re: 100 mbps hub
>
>
> Hubs, by their very nature, are slow.  That's just how they work.  If you
> want 100MBPS, get a switch.  Now, of course, you shouldn't be getting
> speeds *that* so, unless your measuring connections that have passed the
> cable modem, which usually run only at 10 BPS.
>
>
> On Sun, 27 Jul 2003, Raul A. Gallegos wrote:
>
> > Hi.  I have or so I thought was a 100 mbps hub however my transfers
> > within my lan seem to only be set at 10 mbps.  The nics to my knowledge
> > are 10/100 type cards so I don't think that is the problem.  Is there a
> > way to tell what settings to use or could my hub be going south?  I
> > don't know the naem or model right off but it's just a 16-port hub with
> > one uplink port where my cable modem plugs into.
> >
> >
>
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
>
>
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
>

Re: 100 mbps hub

[Glenn Ervin]

You are probably right Luke, as I really don't know the difference between a
router, hub, and a gateway.


>From Glenn Ervin
This message originated from a computer which I do not usually use, and when
you reply, you may not be replying to my e-mail address, so my e-mail
address is:
GlennErvin@cableONE.net
.
----- Original Message -----
From: "Luke Davis" <ldavis@shellworld.net>
To: <speakup@braille.uwo.ca>
Sent: Tuesday, July 29, 2003 2:47 PM
Subject: Re: 100 mbps hub


I don't think it's the router that is fast here, but the switch it
contains.  I could be wrong about that, but many small routers contain a
switch.


On Tue, 29 Jul 2003, Glenn Ervin wrote:

> Routers seem to be very fast.
> I can have 3 wireless and 3 wired computers connected to the LAN, and it
is
> amazing how fast I can transfer files back and forth.
> Mine is a dLink7-13 router.
>
>
> >From Glenn Ervin
> This message originated from a computer which I do not usually use, and
when
> you reply, you may not be replying to my e-mail address, so my e-mail
> address is:
> GlennErvin@cableONE.net
> .
> ----- Original Message -----
> From: "Luke Davis" <ldavis@shellworld.net>
> To: "Speakup Mailing-list" <speakup@braille.uwo.ca>
> Sent: Sunday, July 27, 2003 6:50 PM
> Subject: Re: 100 mbps hub
>
>
> Hubs, by their very nature, are slow.  That's just how they work.  If you
> want 100MBPS, get a switch.  Now, of course, you shouldn't be getting
> speeds *that* so, unless your measuring connections that have passed the
> cable modem, which usually run only at 10 BPS.
>
>
> On Sun, 27 Jul 2003, Raul A. Gallegos wrote:
>
> > Hi.  I have or so I thought was a 100 mbps hub however my transfers
> > within my lan seem to only be set at 10 mbps.  The nics to my knowledge
> > are 10/100 type cards so I don't think that is the problem.  Is there a
> > way to tell what settings to use or could my hub be going south?  I
> > don't know the naem or model right off but it's just a 16-port hub with
> > one uplink port where my cable modem plugs into.
> >
> >
>
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
>
>
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
>

_______________________________________________
Speakup mailing list
Speakup@braille.uwo.ca
http://speech.braille.uwo.ca/mailman/listinfo/speakup

Re: 100 mbps hub

[Toby Fisher]

On Tue, 29 Jul 2003, Glenn Ervin wrote:

> You are probably right Luke, as I really don't know the difference between a
> router, hub, and a gateway.

Ok, well a gateway can, technically be a router, a hub, a switch, a bridge 
... anything that connects 2 disparate networks together.

A hub is simply a repeater, i.e. it just takes packets and re-broadcasts 
them, with no regard to their destination address.


As to the difference between a router and a switch:

If we assume that a packet (it doesn't have to be tcp/ip but for example's 
sake w'll say it is) is made up of 7 different parts or layers, with layer 
7 being the top (data) layer and layer 1 being the bottom 
(physical) layer.  This is referred to as the OSI model.

When an application (let's say an email client) sends a packet for 
transmition, here's what happens:

The data (layer 7) is encapsulated (has a header added) which contains 
information to enable another mail client to interpret and display the 
data.  This packet is then passed along, via the operating system, to the 
ip stack, where such control information as source and destination ip 
address are added.  Then it is passed on, at each stage more data is added 
to the front of the packet, as control data for any receipient at the same 
level (i.e. layer 3 control data for decapsulating machines at level 3).  
Eventually, it gets to level 1, the physical layer.  This is where the 
packet is converted into electrical impuolses (light in the case of 
fibre), and transmitted.

When it reaches, let us say, a device, the device looks at the packet.  
Let us say that this device is a router, which usually operate at level 4.  
In order to get to the level 4 data, it must remove (decapsulate) all data 
for levels 1, 2, and 3 before getting to the level 4 data.  Then, if the 
packet needs to be redirected, before this can be done, data for levels 3, 
2 and 1 must be added by each stage as the packet heads back onto the 
transport medium, copper or fibre.

The difference between routers and switches is that switches operate for 
the most part at a lower level, usually level 2, which deals with things 
like device (mac) addresses etc.  Because it directs traffic based on a 
lower level in the OSI model, less encapsulation and decapsulation needs 
to take place, thus a switch will route traffic much faster than a router, 
for the same levels of traffic and same speed of links.


I hope this rather convoluted explanation has been of some use to someone, 
oh and I hope I got it right, as some of it is a bit hazy for me. (grin)

Cheers.

-- 
Toby Fisher	Email: toby@tjfisher.co.uk
Tel.: +44(0)1480 417272	Mobile: +44(0)7974 363239
ICQ: #61744808
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RE: 100 mbps hub

[Whitley GS11 Cecil H]

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Hi,
Hubs work at the speed of the slowest attached device.  It is quite possible
that your cablemodem which most likely is running at 10mb/s is setting the
speed for all attached devices.  If on the otherhand, it is plugged into a
true "uplink" then it's speed shouldn't determine the speed for the rest of
the hub.  One of your autosense (10/100) cards may be
mis-configured/mis-driven to work at 10 vice 100.  Check parameters and if
possible, shut everything down and bring up one at the time and check the
connection speed for each device.
Regards,
Cecil

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