How get all active IP addresses...

  • Thread starter Thread starter George
  • Start date Start date
G

George

Hello,

For home networks (like Linksys), my understanding is the router usually
automatically sets IP addresses (internal network, I assume, and I think
it's called DHCP), and they generally (unless changed) have default
addresses format of 192.168.1.100 to 192.168.1.150.

Is there a way/command/process to identify ALL active IP addresses, like
192.168.1.100 is PC#1
192.168.1.101 is PC#2
192.168.1.102 is PC#3
192.168.1.104 is Print Server,
Etc.

I recently set up something, and because I changed it to "Auto-DHCP" instead
of "fixed-default-
192.168.1.240...
it just "set" a new IP, and never told what it was... I had to step thru a
few and "chance" upon the new device, to get its auto-selected IP. Surely,
there's a better way.

Thanks,
George
 
Hi
The way the DHCP works is totally up to the Router and the way its
manufacturer opt to program it.
Some Routers can do IP resevervation. I.e you can leave the computer's
TCP/IP on Auto Obtain and the Router would always assign the same IP to the
same Network device.
Alas Linksys does not think that this is important and does no provide IP
reservation in their Entry Level Routers. The solution is to assign to the
device static IP that is out of the Router's DHCP range, or to get a new
Router that can do IP reservation.
Jack (MVP-Networking).
 
George said:
Hello,

For home networks (like Linksys), my understanding is the router usually
automatically sets IP addresses (internal network, I assume, and I think
it's called DHCP), and they generally (unless changed) have default
addresses format of 192.168.1.100 to 192.168.1.150.

Is there a way/command/process to identify ALL active IP addresses, like
192.168.1.100 is PC#1
192.168.1.101 is PC#2
192.168.1.102 is PC#3
192.168.1.104 is Print Server,
Etc.

I recently set up something, and because I changed it to "Auto-DHCP" instead
of "fixed-default-
192.168.1.240...
it just "set" a new IP, and never told what it was... I had to step thru a
few and "chance" upon the new device, to get its auto-selected IP. Surely,
there's a better way.

Thanks,
George
Click to expand...

Even though Linksys entry level routers don't provide for IP
reservation, they do allow you to see what IP addresses the router's
DHCP server has allocated to which clients. Enter the router's
configuration utility and go to Status > Local Network and click on the
"DHCP Clients" button. You'll see a list of the allocated IP addresses
corresponding to client host names and MAC addresses.

--
Lem -- MS-MVP

To the moon and back with 2K words of RAM and 36K words of ROM.
http://en.wikipedia.org/wiki/Apollo_Guidance_Computer
http://history.nasa.gov/afj/compessay.htm
 
Hello,

For home networks (like Linksys), my understanding is the router usually
automatically sets IP addresses (internal network, I assume, and I think
it's called DHCP), and they generally (unless changed) have default
addresses format of 192.168.1.100 to 192.168.1.150.

Is there a way/command/process to identify ALL active IP addresses, like
192.168.1.100 is PC#1
192.168.1.101 is PC#2
192.168.1.102 is PC#3
192.168.1.104 is Print Server,
Etc.

I recently set up something, and because I changed it to "Auto-DHCP" instead
of "fixed-default-
192.168.1.240...
it just "set" a new IP, and never told what it was... I had to step thru a
few and "chance" upon the new device, to get its auto-selected IP. Surely,
there's a better way.

Thanks,
George
Click to expand...

If yo tell Windows XP to use a "fixed" IP address, this is normall7y
stored on each . There is no central "list" of IP addresses used off
your network. Most routers will only list out the IP addresses that
"its" DHCP service gives out. Some router can offer "fixed" IP
address assigned by the DHCP service (aka perminate IP, static IP)
based the the network adapter "MAC" id address.

You now would need to locate a IP address scanner so as to be able to
"detect" the IP addresses used.
 
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