Ethernet A/B switch?

F

Frank

Hi,
I have a single pc conneted to cable modem. I have a drive bay, 2 hds
inerchanable. I want to install w2k on one of the drives and study some
networking ( I have a netgear switch and 2 older pcs for clients) Is there
such a thing as an A/B switch for ethernet? I do not want to swap cables or
install another nic. Do I have any easy, inexpensive options? I need to use
my one strong pc for both tasks.
thanks
Frank L
 
P

Pegasus \(MVP\)

Frank said:
Hi,
I have a single pc conneted to cable modem. I have a drive bay, 2 hds
inerchanable. I want to install w2k on one of the drives and study some
networking ( I have a netgear switch and 2 older pcs for clients) Is there
such a thing as an A/B switch for ethernet? I do not want to swap cables or
install another nic. Do I have any easy, inexpensive options? I need to use
my one strong pc for both tasks.
thanks
Frank L

Use a hub. They cost very little, and are far more reliable and
flexible than a mechanical switch.
 
F

Frank

Thanks, but how would I stop the w2k server HD from seeing the cable modem?
I do not want to disconnect cables and i do not want my learning server on
the internet. Possibe?
Frank
 
P

Pegasus \(MVP\)

I must admit that I do not fully understand what you're
trying to achieve. For one thing, it is not the "w2k server
HD" that can see the cable modem - the hard disk never
sees anything, it's always the PC and its operating system.

I suggest you draw a little sketch so that we can see
the two modes of operation and what exactly is
supposed to be connected to what in each case.
 
J

Jeff Cochran

I have a single pc conneted to cable modem. I have a drive bay, 2 hds
inerchanable. I want to install w2k on one of the drives and study some
networking ( I have a netgear switch and 2 older pcs for clients) Is there
such a thing as an A/B switch for ethernet? I do not want to swap cables or
install another nic. Do I have any easy, inexpensive options? I need to use
my one strong pc for both tasks.

See:

http://froogle.google.com/froogle?q=a/b+switch+rj45

Jeff
 
F

Frank

OK, I readily admit I do not know all I should about networking, but the w2k
server HD is the OS HD, is it not? I do not understand your distinction
between HD and OS, if the HD is the primary boot device. The OS is installed
on the HD? Consequently, when I boot the pc with the server HD in the bay,
the nic is still connected to the cable modem. There is no software for the
ethernet cable connection and w2k server certainly will see the modem., so I
guess I do not understand your question. I do appreciate you taking the time
to answer. But now I am really confused.
Thanks
Frank L
 
P

Pegasus \(MVP\)

Have you thought about making a little sketch?

Mode 1 (server disk inserted in PC1)
======
- PC 1 to connect to PC2 and PC3 via a switch
- PC2 and PC3 to connect to the Internet via the cable modem
- PC1 not to connect to the Internet.

Mode 2 (other disk inserted in PC1)
======
-
-
-

Your turn to fully explain the two modes to us!
 
R

Roland Hall

in message
: Have you thought about making a little sketch?
:
: Mode 1 (server disk inserted in PC1)
: ======
: - PC 1 to connect to PC2 and PC3 via a switch
: - PC2 and PC3 to connect to the Internet via the cable modem
: - PC1 not to connect to the Internet.
:
: Mode 2 (other disk inserted in PC1)
: ======
: -
: -
: -
:
: Your turn to fully explain the two modes to us!

I am completely lost, as you are. However, this might be what he wants to
do but the cable swapping is still confusing.

One system with two interchangeable drives. One drive will be set with a
client OS and one with W2K (possibly server). It appears he wants to use
both, possibly at the same time, on the same computer, which is not
possible. Or perhaps use them separately but it appears he wants to
practice network with his other two systems but does not want to be on the
Internet when he does. I think what he's needing is a NAT router, and not
just a shared/switched hub. He may not be aware of this type of setup.

--
Roland Hall
/* This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose. */
Online Support for IT Professionals -
http://support.microsoft.com/servicedesks/technet/default.asp?fr=0&sd=tech
How-to: Windows 2000 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;308201
 
F

Frank

No I do not want to use both at the same time, there is only one bay. I am
not a network wiz, but I am not an idiot either.And where did I say I wanted
the workstations on the internet.I really do appreciate you guys, but I do
not understand why it is so hard to see what I mean. I have one Good PC. It
has a removable bay. One HD at a time. Right now I am using WinXP Pro HD
(meaning WinXP Pro is installed on the HD) is inserted in the bay.The other
HD (with W2K server installed on it) is on my kitchen table doing nothing.
The nic in the PC is ALWAYS connected to the cable modem directly. I am on
the internet writing this letter. When I come home from work, I will remove
this(winxp HD) from the bay in the PC and put it on the kitchen table. I
then will take the HD with W2k server installed on it and slip it in the
bay. Now my PC is a w2k server with the nic(only one in the PC) still
connected to the cable modem. That is where the problem comes in. I do not
want the small network setup to be on the internet. I want the cable modem
OUT of the picture. So, if I had a mechanical switch box I could come out of
the nic into the box input. A/B switch "A" goes to the cable modem(thats for
when I have the Win XP HD in the PC). The "B' output would go to a netgear
switch which feeds my 2 workstations. Hence, the cable modem is out of the
picture when the box is switched to "B". I really do not see why this is so
hard to understand.
Thanks again,
Frank
 
P

Pegasus \(MVP\)

The saying that a picture speaks a thousand words appears
to hold true in your case, even though you have used only 304
words. I had to read them three times, probably because I'm
sometimes a bit thick. I then translated your words into the
simple attached picture.

If my translation is correct then all you need to do is unplug
the CAT5 cable from the cable modem and plug it into the hub.
I have never seen a switch to perform this task but I'm sure you
can find one if you look long and hard enough.

A more elegant solution would consist of installing a
second network adapter into the "Good PC". They
are dirt cheap. You then fiddle the IP address of NIC1
so that it simply will not talk to the cable modem
when running in "Server" mode.
 
P

Phillip Windell

Alright! I've watched long enough! :)

I think I know what you are doing. It is basically a "duel boot" thing.
Regaurdless of whether the OS's are sharing the same drive or different
drives or physically swaping "quick-change" drives, it is still basically a
duel-boot situation.

Just unplug the patch cable from NIC that leads from the Cable Modem. It may
be a Crossover Cable so don't use it for anything else,..just leave it
dangle. Use a different normal patch cable to plug into the switch.

Network cabling is to "sensitive", there are no A/B boxes for that I have
ever heard of.

Problem solved.
 
G

GRCC

;-) Yes. That is what I am doing and I thought I mentioned numerous times
that I didn't want to swap cables( implying I knew that already).Doesn't
matter though. I will do that for now. I am sorry my explainations were so
hard to understand, I do tend to babble and I apoligize for that. I also
like Pegasus's idea of 2 nicsm also. I really appreciate you people bearing
with me. I truly appreciate all responses. Your thoughts and suggestions are
never wasted on me. I live to learn and always listen.
Thanks so much again, for now I will swap the cables and see about picking
up a second nic and giving that a shot
Frank l
 
G

GRCC

Sorry, one more thing. Now that this is over, please , if you get a second,
read the 3rd to the last sentence in my original post.
Thanks So Much
Frank L
 
N

no one

c'mon, get real!!! If you use a switch/router, you can
configure the router to block all the ports so, even
though your test box would be "on the internet" through
the switch to the cable modem, it is of little
consequence since it is not vulnerable to attack from
outside cuz you're using the router as a firewall!
Problem solved!
 
R

Roland Hall

in message : c'mon, get real!!! If you use a switch/router, you can
: configure the router to block all the ports so, even
: though your test box would be "on the internet" through
: the switch to the cable modem, it is of little
: consequence since it is not vulnerable to attack from
: outside cuz you're using the router as a firewall!
: Problem solved!

That was what I was getting at. The router behind the modem, which has a 4+
port switch attached solves all issues. I knew he didn't want to switch the
cable which was the main reason I think he posted. However, once he got
excited the message got clearer! (O:=

Hey Frank... We've all been there. I got beat up by a Pix Firewall tonight
so you're not alone. The router is a better solution because it will also
give you some protection. There is more than one solution you can choose.

Some will put in another NIC and use ICS. Some will use an RRAS config.
Some will use a router. Different scenarios, different costs but most will
provide a similar solution. I prefer using a router not only because it
affords me to use multiple systems, that I have on my network, on the
Internet but it is because updates for my OS are ON the Internet. Sometimes
a system may be down for maintenance or be in the middle of a config so I
will use another for daily routines. Whatever scenario you use that fits
best for you and your budget is your best solution, for now.

--
Roland Hall
/* This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose. */
Online Support for IT Professionals -
http://support.microsoft.com/servicedesks/technet/default.asp?fr=0&sd=tech
How-to: Windows 2000 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;308201
FAQ W2K/2K3 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;291382
 
F

Frank

OK. I am opting for the Router. I figure I might as well go wireless because
I have a nice laptop also with xp pro. I guess I will need a card for the
laptop(wireless) I have been looking at the linksys WRT54G, kind of
expensive but looks great. Any Suggestions? And thanks again
Frank L
 
R

Roland Hall

in message : OK. I am opting for the Router. I figure I might as well go wireless
because
: I have a nice laptop also with xp pro. I guess I will need a card for the
: laptop(wireless) I have been looking at the linksys WRT54G, kind of
: expensive but looks great. Any Suggestions? And thanks again
: Frank L

Hi Frank...

Thanks for responding. I think you will be happy with this path you're
taking. I would like to offer some of my experiences with the SOHO wireless
interconnectivity devices on the market. You will probably hear good and
bad stories from different people which may contradict each other so I will
narrow my focus to shared issues between different brands and issues with
wireless networking.

1. If you buy the cheapest on the market, you get the cheapest product. I
have used Linksys, Netgear, SMC and Belkin. At the business level I
strictly use Cisco.

2. Re: wireless, I found that 802.11b is basically crap. 54G is a lot
better and wireless will improve over time but I encourage you to
investigate wireless technology, specifically spending time researching
installation. Wireless connectivity, as you would use it, would involve at
least one AP (Access Point) and at least one wireless NIC. Your AP should
be installed where it can either get a clear line of site or a path through
a wall that is close to straight through the wall as possible. The greater
degree the angle, the more material and which type of material between the
remote NIC and the AP, the weaker the signal, not to exclude that distance
also comes into play. 54G appears to handle this a lot better while also
providing a better networking experience, not to mention a higher speed over
802.11b.

3. Encryption. You should use encryption and only allow known NICs on your
network. Your wireless range, since it is designed to work through walls,
will not stop at the perimeter of your home. When you can easily make a
directional microwave receiver from a Pringles can and less than $12 worth
of parts, you can be sure people drive around with laptops, daily, trying to
get into networks wherever they can.

4. The SOHO wireless routers generally come with a 4-port switch so you can
also have wired devices. You can hang another switch off each one of those
ports and a multitude of wireless devices. I have a Belkin 54G wireless
router with switches, servers, printers, workstations and wireless devices
connecting and I have no connectivity issues or bottlenecks within my
network. I can walk around with my laptop anywhere in the house and never
lose connectivity or experience a dramatic loss of bandwidth. It is the
only SOHO I have used wirelessly at 54G. The others were 802.11b including
another Belkin router. I had issues with all of them. The Linksys, the
model you referenced, offers quite a bit and you may be very happy with it.
I don't have any direct related experience to offer there. My wireless NICs
are all Cisco. They will most likely run more than the others.

5. Interfaces: The SOHO routers offer web based interfaces and are
generally PnP to get up and running with DHCP enabled. This can cause a
problem if you have DHCP running on a W2K or W2K3 server so you might want
to connect the router and one workstation to a switch, disable the DHCP and
then connect it to your network. If you're running AD, you do not want to
use DHCP from your router, although it is possible. You also do not want it
to provide DNS to the workstations since DNS should be coming from the AD
server, instead of being passed via the router which is pointed to the ISPs
DNS.

HTH...

--
Roland Hall
/* This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose. */
Online Support for IT Professionals -
http://support.microsoft.com/servicedesks/technet/default.asp?fr=0&sd=tech
How-to: Windows 2000 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;308201
FAQ W2K/2K3 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;291382
 
F

Frank

Roland,
Thanks so much for talking the time to write all that out. I really
appreciate it.
Frank l
 

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