Changing the IP Address of Router

I have a DSL modem (Westell model 6100 from Verizon) connected via USB to
a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so I can
share the internet connection with another desktop PC in a downstairs room.
I used an ethernet cable to connect the router to the modem. With the
primary PC on I powered up the modem, then the router. Because the primary
PC is connected to the modem I was able to access the internet but even
though I was getting a signal on the second PC I was unable to connect to the
internet. Plus if I rebooted the primary PC the USB connection to the modem
is dropped. Rebooting without the router connected to the modem does not
effect the the USB connection.
The extent of my technical knowledge is I know enough to get myself in
trouble, so after about 6 hours of troubleshooting I stumbled on the fact
that both the modem and router are trying to use the same IP address. Will
changing the IP address on either the modem or the router fix my problem? If
so, how do I do that?

FDL-nj wrote:
> I have a DSL modem (Westell model 6100 from Verizon) connected via USB to
> a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so I can
> share the internet connection with another desktop PC in a downstairs room.
> I used an ethernet cable to connect the router to the modem. With the
> primary PC on I powered up the modem, then the router. Because the primary
> PC is connected to the modem I was able to access the internet but even
> though I was getting a signal on the second PC I was unable to connect to the
> internet. Plus if I rebooted the primary PC the USB connection to the modem
> is dropped. Rebooting without the router connected to the modem does not
> effect the the USB connection.
> The extent of my technical knowledge is I know enough to get myself in
> trouble, so after about 6 hours of troubleshooting I stumbled on the fact
> that both the modem and router are trying to use the same IP address. Will
> changing the IP address on either the modem or the router fix my problem? If
> so, how do I do that?
>
Hi,
Did you read the manual which came with the router?
Router has WAN port which connects to modem, all PCs connect to
LAN ports or via wireless. So how can you connect a PC and router
to modem?

In article <6973ca35de786@uwe>, on Sat, 18 Nov 2006 03:34:16 GMT, FDL-nj
wrote:

> I have a DSL modem (Westell model 6100 from Verizon) connected via USB to
> a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so I can
> share the internet connection with another desktop PC in a downstairs room.
> I used an ethernet cable to connect the router to the modem. With the
> primary PC on I powered up the modem, then the router. Because the primary
> PC is connected to the modem I was able to access the internet but even
> though I was getting a signal on the second PC I was unable to connect to the
> internet. Plus if I rebooted the primary PC the USB connection to the modem
> is dropped. Rebooting without the router connected to the modem does not
> effect the the USB connection.
> The extent of my technical knowledge is I know enough to get myself in
> trouble, so after about 6 hours of troubleshooting I stumbled on the fact
> that both the modem and router are trying to use the same IP address. Will
> changing the IP address on either the modem or the router fix my problem? If
> so, how do I do that?

Did you try the help facility on the Verizon web site? They have a
complete how-to tutorial:

http://netservices.verizon.net/porta...sp?case=C21176


--
Seth Goodman

FDL-nj wrote:
> I have a DSL modem (Westell model 6100 from Verizon) connected via USB to
> a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so I can
> share the internet connection with another desktop PC in a downstairs room.
> I used an ethernet cable to connect the router to the modem. With the
> primary PC on I powered up the modem, then the router. Because the primary
> PC is connected to the modem I was able to access the internet but even
> though I was getting a signal on the second PC I was unable to connect to the
> internet. Plus if I rebooted the primary PC the USB connection to the modem
> is dropped. Rebooting without the router connected to the modem does not
> effect the the USB connection.
> The extent of my technical knowledge is I know enough to get myself in
> trouble, so after about 6 hours of troubleshooting I stumbled on the fact
> that both the modem and router are trying to use the same IP address. Will
> changing the IP address on either the modem or the router fix my problem? If
> so, how do I do that?
>
My advise here would be to get a modem that uses the RJ45 jack
connection and dump the USB. You take a regular networking cable that
uses the RJ45 plug and plug one end into the modem that uses RJ45 and
the other end into the RJ45 WAN port on the router.

You then use a regular Ethernet Networking Interface Card with a RJ45
connection in the desktop computer and take a networking cable like the
one up above and plug it into the LAN port on the router.

If possible, you should put all of your computers behind the protection
of the router. The router protects them from attacks from the Internet.
That's what the router is for and not the computer, which is to protect
the LAN-Local Area Network from attacks from the Internet.

http://www.homenethelp.com/web/explain/about-NAT.asp

You might want to look into the wireless security for the home too and
apply where possible.

http://netsecurity.about.com/cs/wire...aa112203_2.htm

If the router has a syslog and Wallwatcher can be implemented, then you
should use WW and watch traffic to and from the router for possible
connections from machines behind to dubious remoter IP(s) on the Internet.

http://www.sonic.net/wallwatcher/

Duane :)

Mr. Arnold wrote:
> FDL-nj wrote:
>> I have a DSL modem (Westell model 6100 from Verizon) connected via
>> USB to
>> a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so
>> I can
>> share the internet connection with another desktop PC in a downstairs
>> room.
>> I used an ethernet cable to connect the router to the modem. With the
>> primary PC on I powered up the modem, then the router. Because the
>> primary
>> PC is connected to the modem I was able to access the internet but even
>> though I was getting a signal on the second PC I was unable to connect
>> to the
>> internet. Plus if I rebooted the primary PC the USB connection to the
>> modem
>> is dropped. Rebooting without the router connected to the modem does not
>> effect the the USB connection.
>> The extent of my technical knowledge is I know enough to get myself in
>> trouble, so after about 6 hours of troubleshooting I stumbled on the fact
>> that both the modem and router are trying to use the same IP address.
>> Will
>> changing the IP address on either the modem or the router fix my
>> problem? If
>> so, how do I do that?
>>
> My advise here would be to get a modem that uses the RJ45 jack
> connection and dump the USB.

The Westell 6100 can use either Ethernet or USB

II am really not seeing the problem though.

Use the dhcp server that is already setup and ready to go in the Westell
and plug the cable from the westell into a switch and plug your computer
into the switch

+---------+ +--------------+ +----------+
| westell |<------>| hub/switch |----->| Computer |
+---------+ +--------------+ +----------+

the westell is setup to start serving ip from the range of 192.168.1.2
to 192.168.1.50

That is if one uses Ethernet. Who know how their usb stuff works.
Looking at my Westell it appears that if you use the Westell with usb
and a router it would require 2 IP's to work.

Come to thing about it if he is working with a router that supported
PPOE (and the WRT300N does) he could just put the Westell into bridging
mode (actually very easy to do) and setup his router to do the work.

+-----------+ +----------+ +----------+
| westell |<------>| Router |----->| Computer |
|in bridging| +----------+ +----------+
| mode |
+-----------+

You take a regular networking cable that
> uses the RJ45 plug and plug one end into the modem that uses RJ45 and
> the other end into the RJ45 WAN port on the router.
>
> You then use a regular Ethernet Networking Interface Card with a RJ45
> connection in the desktop computer and take a networking cable like the
> one up above and plug it into the LAN port on the router.
>
> If possible, you should put all of your computers behind the protection
> of the router. The router protects them from attacks from the Internet.
> That's what the router is for and not the computer, which is to protect
> the LAN-Local Area Network from attacks from the Internet.
>
> http://www.homenethelp.com/web/explain/about-NAT.asp
>
> You might want to look into the wireless security for the home too and
> apply where possible.
>
> http://netsecurity.about.com/cs/wire...aa112203_2.htm
>
> If the router has a syslog and Wallwatcher can be implemented, then you
> should use WW and watch traffic to and from the router for possible
> connections from machines behind to dubious remoter IP(s) on the Internet.
>
> http://www.sonic.net/wallwatcher/
>
> Duane :)
>

On Sat, 18 Nov 2006 03:34:16 GMT, in alt.internet.wireless , "FDL-nj"
<u29274@uwe> wrote:

> I have a DSL modem (Westell model 6100 from Verizon) connected via USB to
>a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so I can
>share the internet connection with another desktop PC in a downstairs room.
> I used an ethernet cable to connect the router to the modem.

Er, sounds to me like your modem has two sockets, USB and Ethernet. In
my experience modems won't accept a connection on both simultaneously.
> The extent of my technical knowledge is I know enough to get
myself in
>trouble, so after about 6 hours of troubleshooting I stumbled on the fact
>that both the modem and router are trying to use the same IP address.

Probably. Your solution is to connect the modem to the routers WAN
port, and both PCs to the router. Thats the purpose of a router.
--
Mark McIntyre

FDL-nj <u29274@uwe> wrote:
> I have a DSL modem (Westell model 6100 from Verizon) connected via USB
> to a desktop PC. I bought a Linksys Wireless-N router (model WRT300N)
> so I can share the internet connection with another desktop PC in a

The cable modem that I have supports both USB connections at the same time,
but the package I subscribe to with my ISP only allows one computer
connected at a time. You probably need to abandon the USB connection to
the computer, and use an ethernet connection to the router. Then the
modem/ISP only sees one device connected to the internet.

If your PC only has a USB port and no ethernet port, you will have to buy
an adapter. A wired PCI adapter can be purchased for $10-20. Or you could
buy a USB-wired_ethernet, or a USB-WiFi adapter (in order of my
preference).

When you turn off the PC, are you able to connect via the router to the
internet? If not, then you might need to set up PPoE login on the new
router. How did you connect the modem to the internet originally? Most
DSL is PPoE. Some of it is handled in the modem, whcih should still work
for the router, just as it did for the PC. Some of it is handled by the
PC, which you now have to substitute into the modem or router, and disable
in the PC. http://snowplow.homedns.org:81/verizon_modem_pppoe.htm shows an
example of PPoE in the modem.

--
---
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5

Thanks to everyone who replied... seems like I was overthinking the setup
because I didn't want to mess up the connection I already had between the
primary PC and the modem...
So if I unplug the USB connection and use an ethernet cable from the
router to the primary PC that will eliminate the conflicting IP addresses?


Mark McIntyre wrote:
>> I have a DSL modem (Westell model 6100 from Verizon) connected via USB to
>>a desktop PC. I bought a Linksys Wireless-N router (model WRT300N) so I can
>>share the internet connection with another desktop PC in a downstairs room.
>> I used an ethernet cable to connect the router to the modem.
>
>Er, sounds to me like your modem has two sockets, USB and Ethernet. In
>my experience modems won't accept a connection on both simultaneously.
>> The extent of my technical knowledge is I know enough to get myself in
>>trouble, so after about 6 hours of troubleshooting I stumbled on the fact
>>that both the modem and router are trying to use the same IP address.
>
>Probably. Your solution is to connect the modem to the routers WAN
>port, and both PCs to the router. Thats the purpose of a router.

--
Message posted via HWKB.com
http://www.hwkb.com/Uwe/Forums.aspx/...eless/200611/1

FDL-nj via HWKB.com wrote:
> Thanks to everyone who replied... seems like I was overthinking the setup
> because I didn't want to mess up the connection I already had between the
> primary PC and the modem...
> So if I unplug the USB connection and use an ethernet cable from the
> router to the primary PC that will eliminate the conflicting IP addresses?
>
>

The bottom line here is get the computers behind the router and not have
the router behind a machine. The router is the gateway to the Internet
and the computer should not be the gateway to the Internet, with the
router behind the computer in a network situation, when there is a
router sitting there. You should do the right thing.

The router will get the IP from the modem and all machines connected to
the router will get a DHCP IP from the router. That's the way it should
happen.

Duane :)

Yes. What "Mr. Arnold" (Duane said). Once you get the interconnection
architecture right, you've got a fighting chance of working everything else
out. There's a free series of movies here:

http://www.askmisterwizard.com/EZINE/index.htm

intended to help you visualize and understand that subject. Scroll down in
the largest window until you see this title:

Episode 10 Segment 1
NAT Routers Part 2: Connecting 2 or more PCs to the Internet through a
single Internet Address

I hope this helps!

Bob Bosen
www.AskMisterWizard.com
Computer Networking and Internetworking Made Easy thru Multimedia



"Mr. Arnold" <TheDog@It's-A-Dog'sWorld.COM> wrote in message
news:D8N7h.465$tM1.387@newsread1.news.pas.earthlin k.net...
> FDL-nj via HWKB.com wrote:
>> Thanks to everyone who replied... seems like I was overthinking the
>> setup
>> because I didn't want to mess up the connection I already had between the
>> primary PC and the modem...
>> So if I unplug the USB connection and use an ethernet cable from the
>> router to the primary PC that will eliminate the conflicting IP
>> addresses?
>>
>>
>
> The bottom line here is get the computers behind the router and not have
> the router behind a machine. The router is the gateway to the Internet and
> the computer should not be the gateway to the Internet, with the router
> behind the computer in a network situation, when there is a router sitting
> there. You should do the right thing.
>
> The router will get the IP from the modem and all machines connected to
> the router will get a DHCP IP from the router. That's the way it should
> happen.
>
> Duane :)

dold@XReXXChang.usenet.us.com wrote:
> FDL-nj <u29274@uwe> wrote:
>> I have a DSL modem (Westell model 6100 from Verizon) connected via USB
>> to a desktop PC. I bought a Linksys Wireless-N router (model WRT300N)
>> so I can share the internet connection with another desktop PC in a
>
> The cable modem that I have supports both USB connections at the same time,
> but the package I subscribe to with my ISP only allows one computer
> connected at a time. You probably need to abandon the USB connection to
> the computer, and use an ethernet connection to the router. Then the
> modem/ISP only sees one device connected to the internet.

The Westell 6100 only supports the usb or the Ethernet connection not
both at the same time.

>
> If your PC only has a USB port and no ethernet port, you will have to buy
> an adapter. A wired PCI adapter can be purchased for $10-20. Or you could
> buy a USB-wired_ethernet, or a USB-WiFi adapter (in order of my
> preference).
>
> When you turn off the PC, are you able to connect via the router to the
> internet? If not, then you might need to set up PPoE login on the new
> router. How did you connect the modem to the internet originally? Most
> DSL is PPoE.

The Westell 6100 supports PPOE on there web based setup page as well as
DHCP, but there is only one Ethernet port. Like I originally said he
should connect his modem to a switch and than connect his machine to the
switch. Or if he want wireless and has a wireless router/switch he
could just put the Westell into bridging mode and have his router/switch
handle the PPoE and DHCP assignments.

There is really no reason that this should of ever been so hard, or this
complicated to do!

Some of it is handled in the modem, whcih should still work
> for the router, just as it did for the PC. Some of it is handled by the
> PC, which you now have to substitute into the modem or router, and disable
> in the PC. http://snowplow.homedns.org:81/verizon_modem_pppoe.htm shows an
> example of PPoE in the modem.
>