Internal network ip address's

[Oper8or]

I'm doing a project in class. I have searched and searched but I can not find information on this.
We are behind a switch connected to a private network at school. How do I see the ip address's in my class. We are on a domain, but not everyones laptops are logged on. They are on the network but and can access the internet. I need to be able to see the ip address's within our class. I can see the computer names on the domain.. of which I dont want to see thier ip address's. Only the ones in my class. Of course I can ping them IF they tell me thier ip.. I need to find out how to see thier ip with out asking. The switch does not have a gui.. so its a no go using visual. If someone has any ideas.. please help me. If this question puts certain ideals at risk and arent allowed within these forums, please do not respond to this on the forums. Please just send me a pm letting me know.
No the teacher will not tell us how to do it. My book has no information on it. No exact procedure. Sadly.

[Oper8or]

no one?

[NWEng]

That's going to be difficult if there are multiple switches in the network. The first thing I would do is determine the size of the address range by entering "ipconfig" at a DOS prompt and note the network address and subnet mask; the network will give you your addresses, and the mask will determine the number of addresses in the network. The next step will depend on what you find out, it could be as simple as determining the address range if it's a small IP network, or you'd need access to the switches that everyone in the class connects; it all depends.

[TempliNocturnus]

The switch will tell you nothing about IP addresses. It's a layer 2 device. I believe it is the nslookup utility you should be using.

[NWEng]

It depends on the switch, it should (may) also have an arp cache, but you'll need to determine who's on the local switch and who's simply on the network.

[ErikD]

It is difficult to say without knowing more about the exact setup. Is this an isolated lab class where you are all connected to a single switch? Then a show arp will give a list of all IPs, but not associated DNS or netbios name. If it just connects out to the school network at large, well then you will get a huge list of every computer in the network potentially. You could look on the DNS server for name associations too.

Really depends on your setup, what kind of access you have, and what your goals are.

[Oper8or]

It's still live. No one has figured it out yet. LOL> We are still working on it. We are connected to a single switch on the schools network. So we are still on the Domain. I've tried arp, nslookup, nbtstat, netstat and even netsend isnt working. We can all ping each other.. all running sp2 winxp (laptops).

[El<(')>Maxi]

Login to the switch, that will tell you all you need to know.

[bchur83]

networkview? I have used it a few times to see what IPs are in use on our network and to see who is running servers.

http://www.networkview.com/

[fUzZ bUnNy]

You need to actively scan your network (I think ethereal would work). Then type arp -a.

It should show every computer that your computer made contact with. Personally, If they are in a large network with more than 254 hosts, I would hope that they have everything vlanned because you could end up coming up with 100's of connections.

I agree with everyone there. The switch is a layer 2 device the most it will show is a list of mac addresses. You need access to a router or you need to send packets from your computer so that you can figure out where everything is.

[SpaceyWilly]

If you know the computer name you could just ping the computer name and it will tell you the ip address, i.e. if I type "ping dad" into the command prompt right now it will tell me "pinging dad [192.168.1.2]", so now I know dad's IP...
hope this helps