You have to reset the router. It still has the mac address from the previous cable modem. Once you reset it, it will pick up the new mac address from the new cable modem.
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Home Network Cable Modem
Hi, I have been using a cable modem with a linksys router for about a year now. I have 5 machines, (4 XP and 1 98), behind the router and it worked fine for all 5 machines. The cable company recently sent me a new cable modem and since then my router would only let 1 machine out to the internet. I replaced the router with a simple Dlink switch and now all 5 can get out but I no longer can see the network. No machine can see the other. Help
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Answers
1. Unplug (the power) from your cable modem for 10 minutes
2. unplug your ethernet cable from the modem
3. turn off your computers
4. Plug in your cable modem and press the reset button (or however you reset it)
5. Plug in your ethernet cable to the modem.
6. Plug in the other end of your ethernet cable to the OUTSIDE port of your router. (ie the uplink port)
7. Connect 1 computer to another port on the router like port #4 or something.
8. Boot up your computer and open a dos window and type "ipconfig" or go to start>run and type in "winipcfg" and see if your router is giving you an ip address. (should be something like 192.168.*.* (*=?)
9.Make sure your router has the NAT firewall option enabled and that it is actually a gateway/nat device. If its not and does not have a DHCP server in it then you have to program the inside ports address to a private address such as 192.168.0.1 and all other computers ip addresses to 192.168.0.2, 192.168.0.3 etc
10. If it is a DHCP device meaning it will automatically assign ip addresses to your computers, make sure the network cards of each machine are set up to "Obtain IP address Automatically" by clicking on that selection in your network cards (TCP/IP Ethernet card name here) listing under start>settings>control pannel>network>properties>
IP: 192.168.0.2
Subnet mask 255.255.255.0
etc
hopes this helps a little
Here is your problem.
Your computers are likely on different subnets, or IP ranges. The routing between them is likely not working properly and thus you cannot see the other computers.
Your best bet is to reset the router, on a linksys use a paperclip and depress the reset button and unplug/plugin the power cord. hold the reset for a few seconds (about 10) and this will reset the router. If your router is acting up, you may have to repeaset the reset sequence a few times.
Note: Cable modems do not have mac addresses.
If your cable internet provider requires a mac address to allow you online, be sure to contact them and give them the mac address of the router. Otherwise just have them release all the mac's from your account and once your router requests an ip address it will get it.
Setup the router to act as a DHCP server internally and externally (if your internet provider uses DHCP) or use a static IP if provided.
This will solve your problem. The only other issue may be with the way linksys DHCP works. You will want to update to the latest firmware revision on the linksys router.
Enjoy.
=)
Are you using dhcp or static ip's? can you ping the other machines?
on all go to a prompt and type
ipconfig /all |more and post the results here please
this will help us help you
Another thought, in the old setup did you set up hosts files? the default network for linksys is 192.168.1.x
for d-link it's 192.168.0.x
if you have hosts files, they are now outdated and need to be replaced (edited) or deleted
Oh, just read this
>simple Dlink switch
not a router? you need a router
try this, put back the linksys, and on the one machine that can connect to the internet
type ipconfig /all |more
make note of the MAC address assigned to the NIC that is connected to the modem, write it down, and then on the linksys router (from the same machine,) connect to the configuration page, and clone the MAC address, reboot the router and check the other machines
I can assure you that cable modems do not have MAC addresses. After working for a cable internet provider here in Canada for a number of years I should know.
I have dealt with this type of problem on a daily basis when working there and the above mentioned comments on how to fix this issue should be tried before rejected.
After all, aren't we all supposed to be people helping other people?
I'd list my qualifications, but as we all know letters after a name mean nothing if the actions and experience don't fix the problems.
Stony, that is true, cable modems don't have a MAC, but here in the states some cable co.s register the MAC address fo the first NIC that connects to the them, hence the ability of some routers to clone the MAC address. It doesn't clone the modem MAC 9no such thing) but it does clone the MAC of the NIC that requests it
What kind of modem did the cable company send you? Apparantly there is an incompatibility with the Motorola Surfboard modem connecting to the WAN port on some routers. I tried to set up my network using a LinkSys router and the Motorola modem last night and ran into the same problem. There is no fix available from Motorola at this time. I replaced it with a LinkSys modem and it worked like a charm.
kasdas:
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by: routermaniaPosted on 2003-01-14 at 09:48:00ID: 7726377
What are your ip address configured