[Sarc]

Yesterday my old faithful 3Com cable modem died at last.
So today the ISP people came and changed it for a Scientific Atlanta WebStar DXP100.
And the strangest thing so far.
My PowerMacG4 cannot browse the iNet (although the modem issues it a real IP). And strangest even, my iBook has no problems getting a real IP or browsing iNet.

So then I start troubleshooting.

First ...the NIC, it can ping the iBook, transfer files, ok, passed.

Second, cables, they are all attached to something that pings so ... ok ... passed.

then I try protocols.
I can view apache pages in both computers using the other one, so, TCP/IP is fine.
then I try DHCP using the built in iNet sharing in jaguar.
everything fine ... even stranger, the G4 has no trouble getting out through the iBook.

anyone ?
I ran fresh out of ideas ...

Thx

[ratlater]

That is a strange problem, here are a few things to think about:

Check the website for the new modem.
Do you have a firewall setup on you PowerMac?
Are the PowerBook and iBook running the same version of X?

Also, try releasing and renewing your DHCP lease on the PowerMac. Make sure it is connected to the modem then in the Network Sys Pref pane click the 'Show' drop down and select 'Network Port Configuration'. Then un-check Built-in Ethernet, and hit Apply. Now re-check built-in Etherenet and apply again.

-matt

[ratlater]

Okay, I'm really bored at work. The modem's website is pretty worthless, this is all that I could find that might be helpful:
Can I switch between a notebook and PC using the same cable modem? Will there be a problem of obtaining a DHCP IP address?

Most cable modem service providers track you by the host name (computer name) and maybe host domain, so as long as you set that information the same in both the PC and the notebook you will be okay. If you are using one of the cable modem service providers that register your PC based on the MAC address of the Ethernet card in the PC, then you will have to call them and have them change that entry every time you switch between the two.

Also you should try to hard reset your cable modem. Unplug it and reset it...leave it un-plugged for at least 5 mins.

-matt

[ebolla]

i had the same problem when i got a cable modem.
but i just plugged everything into a router(not a hub) and now all my machines are surfing happily now.
on the cable modem 2 machines cant share the same IP address - so the router allows them to share the IP address.

[Sarc]

1) I don't have a firewall
2) iBook has OS X 10.2.2, PowerMac 10.2.4

my setup is the same as I had it with my 3Com cable modem, weird thing is that my G4 get's the Ip and can't browse, and the iBook can.

My ISP only assigns 1 IP per modem, but it doesn't track machines, so if I reset the modem I can plug another computer and no problems.

[aaanorton]

This very much smells of a MAC address issue. Try unplugging the modem for a full minute and shut down the G4. Then plug the modem back in. Now wait till the modem goes through all its resetting and it gets an IP. Watch the lights. When they are steady and normal, fire up the G4. That should do it.
As mentioned above, a router would fix this permanently and give you the advantages of a hardware firewall and simultaneous web sharing, to name just a few. Even wireless routers can be had for < $70 (wired models $20-40 or so) these days, so that would be a sound investment.