[dba-Tech] Modems

MAC in MAC Address stands for Media Access Control.

As for your questions.  First, no, a DHCP request will not be sent through a
router, so it will always stay within a LAN.  In your situation, you are
probably getting IP Addresses from your cable modem, since it is probably
running it's own DHCP server.  Are you running ICS (Internet Connection
Sharing), or are you just plugging all of your machines into the cable mode?

As far as assigning IP Addresses, look at what is being set by the machines
that work.  They are probably 192.168.0.x with a subnet of 255.255.255.0.
To manually set these, you need to go to your network properties, and then
go into the properties of the TCP/IP protocols.  (The winipcfg just shows
the current settings, it doesn't let you change them.).

To view the settings in W2k, from a command prompt, type ipconfig. (or
ipconfig /all to get more information).

As far as the pinging goes, I think this is a name resolution issue.  Once
you have the IP Addresses for both machines, ping them with the -a command
(forgot to include that in my little article!)

such as:

ping -a 192.168.0.4

When that pings, it will do a reverse resolution, and tell you the computer
name AND domain name of the machine at 192.168.0.4.  (ie,
CompA.SomeDomain.net)

Drew


----- Original Message -----
From: "Steven W. Erbach" <serbach at new.rr.com>
To: "Discussion of Hardware and Software issues"
<dba-tech at databaseadvisors.com>
Sent: Wednesday, August 20, 2003 5:53 PM
Subject: Re: [dba-Tech] Modems


> Drew,
>
> My experience with Macs ended in 1990. I haven't hardly even sniffed a Mac
> since then.
>
> >> holler if you need more details on anything <<
>
> First, an acronym check: what does MAC stand for, as in MAC address?
>
> Second, in your discussion about DHCP I gathered that when a w/s makes a
> DHCP request, the DHCP server may not actually be on that LAN, correct? We
> have a Novell NetWare 5.1 LAN and I see that the DHCP server NLM isn't
> loaded on the server. Thus the cable modem routes the request to the cable
> company's DHCP server, yes?
>
> I've been examining the configuration of an old Windows 98 SE 133 MHz
> Pentium system that I have set up right next to my main Windows 2000 Pro
> w/s. This Win98 w/s logs into our NetWare LAN just fine, but the IP
address
> is one of those 169 jobbies--which I used Gibson's IPAgent to determine.
> Winipcfg shows me the subnet mask (255.255.0.0, just as you said) but I
> don't see a way to change it with that tool. If I look at the TCP/IP
> protocol settings in the control panel, it's set to acquire an IP address
> automagically and DNS is disabled.
>
> If I set the IP address, to what should I set it? When I ping my Win2k w/s
> from the Win98 w/s I get the same error I got when I tried pinging from my
> sons' WinXP Home system: Host not reachable. When I try to ping the Win98
> system from my Win2k w/s I get a timeout.
>
> I can't quite discern what this means when I refer to your IP essay,
though.
> Any ideas?
>
> Steve Erbach
> Scientific Marketing
> Neenah, WI
>
> "Eventually, socialists run out of other people's money."
> -- Lady Margaret Thatcher
>
>
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