How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

[Guest Darren]

Hi

 

We currently have machines (mostly winxp and linux) setup using static

ip addresses, manually configured on each computer.

 

We now want to implement DHCP and use reservations for all the PCs.

However, we want to use the IP addresses they are already on (we can

see these in DNS).

 

What we need is a list of these IP addresses along with machine name

and MAC address so that we can put them into the dhcp reservations,

either manually or via some sort of import/export utility.

 

Does anyone know an easy way around this ?

 

arp -a seems a bit unreliable and doesn't give us machine name.

 

thanks

[Guest Pegasus \(MVP\)]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

 

"Darren" <googlegroups@dazzas.co.uk> wrote in message

news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

> Hi

>

> We currently have machines (mostly winxp and linux) setup using static

> ip addresses, manually configured on each computer.

>

> We now want to implement DHCP and use reservations for all the PCs.

> However, we want to use the IP addresses they are already on (we can

> see these in DNS).

>

> What we need is a list of these IP addresses along with machine name

> and MAC address so that we can put them into the dhcp reservations,

> either manually or via some sort of import/export utility.

>

> Does anyone know an easy way around this ?

>

> arp -a seems a bit unreliable and doesn't give us machine name.

>

> thanks

>

 

I am puzzled as to why you would want to introduce DHCP while at

the same time keeping your existing addresses. This appears to defy

the purpose of DHCP.

 

An easy way to get all MAC addresses is by getting your PCs to

report them while running the logon script. You could do it by

inserting this single long line into the logon scipt:

 

if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*" %%*

in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

%ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt

[Guest Jason W Martin]

Re: How to get a list of all MAC addresses on LAN and put into DHC

 

Re: How to get a list of all MAC addresses on LAN and put into DHC

 

You can use a utility to scan your network like Angry IP Scanner:

http://www.angryziber.com/ipscan/. Select options menu to choose the column

for MAC address, I don't believe it's displayed by default. If Windows

Firewall prevents some addresses from being displayed, go to the plug-in page

http://www.angryziber.com/ipscan/plugins/ and download the MAC address via

ARP.

 

IP Scanner lets you export your results too. Hope this helps.

 

--

Thanks,

 

Jason W. Martin

TRIa Technology

 

 

"Pegasus (MVP)" wrote:

>

> "Darren" <googlegroups@dazzas.co.uk> wrote in message

> news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

> > Hi

> >

> > We currently have machines (mostly winxp and linux) setup using static

> > ip addresses, manually configured on each computer.

> >

> > We now want to implement DHCP and use reservations for all the PCs.

> > However, we want to use the IP addresses they are already on (we can

> > see these in DNS).

> >

> > What we need is a list of these IP addresses along with machine name

> > and MAC address so that we can put them into the dhcp reservations,

> > either manually or via some sort of import/export utility.

> >

> > Does anyone know an easy way around this ?

> >

> > arp -a seems a bit unreliable and doesn't give us machine name.

> >

> > thanks

> >

>

> I am puzzled as to why you would want to introduce DHCP while at

> the same time keeping your existing addresses. This appears to defy

> the purpose of DHCP.

>

> An easy way to get all MAC addresses is by getting your PCs to

> report them while running the logon script. You could do it by

> inserting this single long line into the logon scipt:

>

> if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*" %%*

> in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

> %ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt

>

>

>

[Guest Darren]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

On 23 Oct, 11:15, "Pegasus \(MVP\)" <I....@fly.com> wrote:

> "Darren" <googlegro...@dazzas.co.uk> wrote in message

>

> news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

>

>

>

>

>

> > Hi

>

> > We currently have machines (mostly winxp and linux) setup using static

> > ip addresses, manually configured on each computer.

>

> > We now want to implement DHCP and use reservations for all the PCs.

> > However, we want to use the IP addresses they are already on (we can

> > see these in DNS).

>

> > What we need is a list of these IP addresses along with machine name

> > and MAC address so that we can put them into the dhcp reservations,

> > either manually or via some sort of import/export utility.

>

> > Does anyone know an easy way around this ?

>

> > arp -a seems a bit unreliable and doesn't give us machine name.

>

> > thanks

>

> I am puzzled as to why you would want to introduce DHCP while at

> the same time keeping your existing addresses. This appears to defy

> the purpose of DHCP.

 

Erm, it seems sensible to implement DHCP so we can assign IP addresses

to our computers through 1 central place.

 

We want to keep IP addresses already in use because people have

mappings to each others machines, e.g. G: mapped to \\192.168.2.55

Therefore .55 cannot change

 

 

> An easy way to get all MAC addresses is by getting your PCs to

> report them while running the logon script. You could do it by

> inserting this single long line into the logon scipt:

>

> if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*" %%*

> in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

> %ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt- Hide quoted text -

 

i tried this but get syntax errors

[Guest Pegasus \(MVP\)]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

 

"Darren" <googlegroups@dazzas.co.uk> wrote in message

news:1193148220.083140.45730@i38g2000prf.googlegroups.com...

> On 23 Oct, 11:15, "Pegasus \(MVP\)" <I....@fly.com> wrote:

>> "Darren" <googlegro...@dazzas.co.uk> wrote in message

>>

>> news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

>>

>>

>>

>>

>>

>> > Hi

>>

>> > We currently have machines (mostly winxp and linux) setup using static

>> > ip addresses, manually configured on each computer.

>>

>> > We now want to implement DHCP and use reservations for all the PCs.

>> > However, we want to use the IP addresses they are already on (we can

>> > see these in DNS).

>>

>> > What we need is a list of these IP addresses along with machine name

>> > and MAC address so that we can put them into the dhcp reservations,

>> > either manually or via some sort of import/export utility.

>>

>> > Does anyone know an easy way around this ?

>>

>> > arp -a seems a bit unreliable and doesn't give us machine name.

>>

>> > thanks

>>

>> I am puzzled as to why you would want to introduce DHCP while at

>> the same time keeping your existing addresses. This appears to defy

>> the purpose of DHCP.

>

> Erm, it seems sensible to implement DHCP so we can assign IP addresses

> to our computers through 1 central place.

>

> We want to keep IP addresses already in use because people have

> mappings to each others machines, e.g. G: mapped to \\192.168.2.55

> Therefore .55 cannot change

>

>

>

>> An easy way to get all MAC addresses is by getting your PCs to

>> report them while running the logon script. You could do it by

>> inserting this single long line into the logon scipt:

>>

>> if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*"

>> %%*

>> in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

>> %ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt- Hide

>> quoted text -

>

> i tried this but get syntax errors

>

>

 

That's probably because you did not unwrap the line. It is really

one long line, believe it or not!

[Guest David]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

What a nightmare of a network!?! Why don't you look into using DNS and WINS

for name resolution. Few issues at start but far better.

 

"Pegasus (MVP)" <I.can@fly.com> wrote in message

news:eXLhEeYFIHA.1388@TK2MSFTNGP05.phx.gbl...

>

> "Darren" <googlegroups@dazzas.co.uk> wrote in message

> news:1193148220.083140.45730@i38g2000prf.googlegroups.com...

>> On 23 Oct, 11:15, "Pegasus \(MVP\)" <I....@fly.com> wrote:

>>> "Darren" <googlegro...@dazzas.co.uk> wrote in message

>>>

>>> news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

>>>

>>>

>>>

>>>

>>>

>>> > Hi

>>>

>>> > We currently have machines (mostly winxp and linux) setup using static

>>> > ip addresses, manually configured on each computer.

>>>

>>> > We now want to implement DHCP and use reservations for all the PCs.

>>> > However, we want to use the IP addresses they are already on (we can

>>> > see these in DNS).

>>>

>>> > What we need is a list of these IP addresses along with machine name

>>> > and MAC address so that we can put them into the dhcp reservations,

>>> > either manually or via some sort of import/export utility.

>>>

>>> > Does anyone know an easy way around this ?

>>>

>>> > arp -a seems a bit unreliable and doesn't give us machine name.

>>>

>>> > thanks

>>>

>>> I am puzzled as to why you would want to introduce DHCP while at

>>> the same time keeping your existing addresses. This appears to defy

>>> the purpose of DHCP.

>>

>> Erm, it seems sensible to implement DHCP so we can assign IP addresses

>> to our computers through 1 central place.

>>

>> We want to keep IP addresses already in use because people have

>> mappings to each others machines, e.g. G: mapped to \\192.168.2.55

>> Therefore .55 cannot change

>>

>>

>>

>>> An easy way to get all MAC addresses is by getting your PCs to

>>> report them while running the logon script. You could do it by

>>> inserting this single long line into the logon scipt:

>>>

>>> if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*"

>>> %%*

>>> in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

>>> %ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt- Hide

>>> quoted text -

>>

>> i tried this but get syntax errors

>>

>>

>

> That's probably because you did not unwrap the line. It is really

> one long line, believe it or not!

>

[Guest Darren]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

On 23 Oct, 11:15, "Pegasus \(MVP\)" <I....@fly.com> wrote:

> "Darren" <googlegro...@dazzas.co.uk> wrote in message

>

> news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

>

>

>

>

>

> > Hi

>

> > We currently have machines (mostly winxp and linux) setup using static

> > ip addresses, manually configured on each computer.

>

> > We now want to implement DHCP and use reservations for all the PCs.

> > However, we want to use the IP addresses they are already on (we can

> > see these in DNS).

>

> > What we need is a list of these IP addresses along with machine name

> > and MAC address so that we can put them into the dhcp reservations,

> > either manually or via some sort of import/export utility.

>

> > Does anyone know an easy way around this ?

>

> > arp -a seems a bit unreliable and doesn't give us machine name.

>

> > thanks

>

> I am puzzled as to why you would want to introduce DHCP while at

> the same time keeping your existing addresses. This appears to defy

> the purpose of DHCP.

>

> An easy way to get all MAC addresses is by getting your PCs to

> report them while running the logon script. You could do it by

> inserting this single long line into the logon scipt:

>

> if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*" %%*

> in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

> %ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt- Hide quoted text -

>

> - Show quoted text -

 

Error I'm getting is

 

Line 1

Char 14

Error Expected 'Then'

Code 800A03F9

[Guest Pegasus \(MVP\)]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

 

"Darren" <googlegroups@dazzas.co.uk> wrote in message

news:1193222009.669065.44860@y27g2000pre.googlegroups.com...

> On 23 Oct, 11:15, "Pegasus \(MVP\)" <I....@fly.com> wrote:

>> "Darren" <googlegro...@dazzas.co.uk> wrote in message

>>

>> news:1193128223.124753.300910@z24g2000prh.googlegroups.com...

>>

>>

>>

>>

>>

>> > Hi

>>

>> > We currently have machines (mostly winxp and linux) setup using static

>> > ip addresses, manually configured on each computer.

>>

>> > We now want to implement DHCP and use reservations for all the PCs.

>> > However, we want to use the IP addresses they are already on (we can

>> > see these in DNS).

>>

>> > What we need is a list of these IP addresses along with machine name

>> > and MAC address so that we can put them into the dhcp reservations,

>> > either manually or via some sort of import/export utility.

>>

>> > Does anyone know an easy way around this ?

>>

>> > arp -a seems a bit unreliable and doesn't give us machine name.

>>

>> > thanks

>>

>> I am puzzled as to why you would want to introduce DHCP while at

>> the same time keeping your existing addresses. This appears to defy

>> the purpose of DHCP.

>>

>> An easy way to get all MAC addresses is by getting your PCs to

>> report them while running the logon script. You could do it by

>> inserting this single long line into the logon scipt:

>>

>> if not exist \\YourServer\SomeShare\%ComputerName%.txt for /F "tokens=*"

>> %%*

>> in ('ipconfig /all ^| find /i "address"') do echo %date% %time:~0,5%

>> %ComputerName% %%* >> \\YourServer\SomeShare\%ComputerName%.txt- Hide

>> quoted text -

>>

>> - Show quoted text -

>

> Error I'm getting is

>

> Line 1

> Char 14

> Error Expected 'Then'

> Code 800A03F9

>

 

The program I gave you is a batch file. You must put it

into a file whose extension is ".bat". It appears that you

put my code into a VB Script file that has a ".vbs" extension.

This won't work - batch language is radically different from

script language. I can see these options for you:

 

a) Use a batch file instead of a VB Script for your logon process.

b) Invoke my batch file from within your VB Script.

c) Design a script solution for your problem.

 

If you need assistance with options b) or c) then you

should repost your question in a scripting newsgroup.

[Guest Leythos]

Re: How to get a list of all MAC addresses on LAN and put into DHCP Reservations?

 

In article <#bNLTcjFIHA.4228@TK2MSFTNGP02.phx.gbl>, I.can@fly.com

says...

[snip]

 

Why not just look in the DHCP table and get the MAC from there?

 

Enable DHCP on the computers, reboot them, look at the DHCP table on the

server, it will show the MAC and you can enter it into the reservation.

 

--

 

Leythos

- Igitur qui desiderat pacem, praeparet bellum.

- Calling an illegal alien an "undocumented worker" is like calling a

drug dealer an "unlicensed pharmacist"

spam999free@rrohio.com (remove 999 for proper email address)