Question about DHCP Reservations

Mmartin_47

Was watching the CBT Nuggets for 291. James states that reservations can be useful to assign the same IP to the same server/client/printer whatever based on its MAC address.

Question is say I have 50 servers and want to use reservations so I don't have to configure each server individually and so the other options are configured such as DNS, router, etc.

Is it possible to pull all the MAC addresses connected to the network so I can make reservations? How is that done?

dave0212

I think the easiest way would be to ping the IP's and check your local MAC Table

Mmartin_47

dave0212 wrote:

I think the easiest way would be to ping the IP's and check your local MAC Table

Yeah I was thinking that's the only way? Dang having 50 servers... Going to take me a while!

mariegenia

Another option is to use a SW that you can download from
http://find-mac-address.uptodown.com/

The SW is called: FIND MAC ADRESS
I've never used, so be carefull... but it seems that could help you!

Good luck!

Slowhand

You're going to find that dealing with MAC addresses is going to be a tedious chore at first. There is no "easy" way to get them from devices, not the same automated way you can find IP addresses and device names. As you work and you dig a little deeper into the networking-end of things, (as you're doing now with 70-291,) you'll get used to cataloging your devices as you get to them. The more you work, the more you'll find uses for MAC addresses, so you'll definitely grow accustomed to noting them the same way you do IP addresses now. Soon enough, pulling a MAC address will be as natural as getting a serial number or model number from a computer.

(Never stops being a pain in the ass, just less so as time passes. )

bwcarty

Angry IP Scanner can ping a range of IP addresses and report their mac addresses quickly. The MAC address column isn't enabled by default - you have to check it under Options > Select Columns.
http://www.angryziber.com/w/Home

Somewhat less convenient would be to use a script to use the getmac command on each of your hosts:
getmac /s system

NetAdmin2436

I like LanSpy, it worked wonders.

http://lantricks.com/

Slowhand

Well, looks like I was wrong about the automation part, judging by the last two posters. Still, it takes a little while before you close down a scanning tool and don't swear a little because you printed out all the IPs, but not the MAC addresses.

Tyrant1919

I use angry IP scanner for a range of IPs. Or nbtstat -a/A to get a single MAC.

Sie

Once you have your list why not use netsh in a script such as the one mentioned here?

http://cwashington.netreach.net/depo/view.asp?Index=983

Or here?

http://www.thegeeksweek.com/blog/scripting-windows-2003-dhcp-server-configuration.html

Mmartin_47

Well these are all excellent solutions! Sorry for late reply but thanks. Don't even have to break a sweat with those programs.