Re: [PLUG] Just trying to ping my DSL modem

[Douglas Lentz <dlentz@dca.net>]

Hi, Stephen.

Thanks for the help. My previous emails may not have been that clear, 
because a) I am somewhat irritated at the situation and b) the 
Significant Other is hovering over me, saying things like "Why doesn't 
it work? It would work if you used Windows. Why do you have to be 
different than everyone else?"

What I was trying to establish is "When I signed up for the service, and 
DCANET sent me the modem, did they send me a piece of junk?"

When DCANET sent me the modem, they sent me no documentation or 
software. I downloaded the user's manual from Zoom, and that's how I 
know about the 10.0.0.2 address, where configuration software is 
supposed to live.  I was trying to reach the 10.0.0.2 address not 
because the modem needed reconfiguration, but because this is the only 
tool I have to verify that I have connectivity with the modem.  I used 
the ifcfg-eth0 configuration you suggested, and no ping at 10.0.0.2

My strategy was to first establish that I had connectivity with the 
modem, and then to wonder why my DHCP client wasn't working. However, I 
have begun to suspect that the Zoom 5515 ADSL Bridge is such a "thin" 
device that this may not be possible. Either everything from my NIC card 
to DCANET's name servers has to be working, or nothing works, and 
troubleshooting is not an option.

Sigh.

I went through Red Hat's GUI network setup program, selected eth0, 
clicked "Automatically obtain address settings with DHCP" and 
"Automatically obtain DNS information from provider". As root, I did a 
"service network restart" and got


Bringing up interface eth0:
Determining IP information for eth0... failed.


My NIC card works, cabling tests out OK, the ADSL modem appears to go 
through a normal bootup sequence and finds its loop  (if you can believe 
the blinking lights)  I know that my DHCP client is dhclient. Maybe that 
isn't a good one?

The other possibility is that the modem doesn't work...but, as above, it 
may not be possible to determine this. Zoom's manual says it works with 
Linux. Maybe I should run out to Microcenter and buy another modem. Any 
suggestions?

I also have a Windows 2000 box. I suppose I can call DCANET, tell them 
to send me the software they didn't send me the first time, give them 
the MAC address from THAT box, and use the the windows box as a gateway, 
but, crap.  I haven't had any problems with the RH box before this, 
installing dial-up ppp was easy, USB devices work fine.

Anyway, thanks a lot David, Stephen & Leon. I will call DCANET Monday AM 
but I am not optimistic.





Stephen Gran wrote:

> On Sat, Aug 13, 2005 at 11:13:46AM -0400, Douglas Lentz said:
>  
>
> > Thanks, Stephen.
> >
> > Re trying to establish connectivity to my DSL modem: I set up my 
> > ifcfg-eth0 as you indicated below, and I do get a response from ping 
> > now. However, I am still uncertain. With this configuration...
> >
> > Stephen Gran wrote:
> >
> >
> > This looks like you have your IP set to a static, but private, network
> > address.  Since you need DHCP, this won't work.  If you want to ping the
> > modem, try
> >
> >
> > DEVICE=eth0
> > BOOTPROTO=none
> > ONBOOT=yes
> > USERCTL=no
> > PEERDNS=no
> > TYPE=Ethernet
> > IPADDR=10.0.0.3
> > NETMASK=255.255.0.0
> > NETWORK=10.0.0.0
> > BROADCAST=10.0.255.255
> > GATEWAY=10.0.0.2
> >
> >
> > ...how can I be sure that I'm pinging the modem? Is it possible that I'm 
> > just assigning address 10.0.0.3 to my RH9 box, and when I ping, I'm just 
> > pinging myself?
> >    
>
> OK, let's back up a step, and understand what you are trying to
> accomplish.  I assumed you had everything correctly configured for DHCP,
> and that didn't work, so you then wanted to test the router (with IP
> 10.0.0.2) to make sure that wasn;t the problem.  So I gave you what I
> think is the right configuration to be able to ping 10.0.0.2.  If you
> are pinging 10.0.0.3, then yes, you are just pinging yourself.
>
> But let's go back to the real problem - you want to get your machine on
> line.  Do you know how to set RH up to use DHCP?  I believe there is a
> nice graphical interface to do this, although I can't remember the name
> of it for the life of me.  Try setting the RH machine to use DHCP, and
> then restart networking.
>  
>
> ------------------------------------------------------------------------
>
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