DHCP Server

[Guest]

I am a newbie at networking and have a question. I have a cisco router that
is currently supplying dhcp to my local network with IP's in the 192.168.1.x
range. I want to use a win2003 server as my dhcp server. Will I absolutely
have to turn off dhcp in the router or can I just begin using dhcp from my
server and not expect any problems? I would like to use the range 192.168.1.x
because the router has an internal IP of 192.168.1.1. My ISP doesn't seem to
understand me when I ask if they can turn off DHCP on the router. I'm missing
why this question is so confusing to them. If anyone can explain this to me I
would be very grateful. Thanks

Adam

 

[Dusty Harper {MS}]

You could use both the router and the Win2k3 server for DHCP. the thing
you'd need to worry about is the scopes. You don't want your scopes
overlapping or its possible that the same address could get assigned to
multiple machines.

I'm a little confused as to why your ISP would be the ones to turn off DHCP
on your router.

{ ISP's responsibility }{ Your Responsibility }
-------------------------[ YourRouter ]---------------------
192.168.1.1

What is the model of the Cisco? DO you normally Admin it yourself?

 

[Guest]

Dusty,

You are absolutely right that I should admin my router. I am currently not
at work but I think it is a cisco ubr900 series router. If I issue a
different scope could I use the same subnet? Remember, I am new to this. If
you could help I would greatly appreciate it.

You could use both the router and the Win2k3 server for DHCP. the thing
you'd need to worry about is the scopes. You don't want your scopes
overlapping or its possible that the same address could get assigned to
multiple machines.

I'm a little confused as to why your ISP would be the ones to turn off DHCP
on your router.

{ ISP's responsibility }{ Your Responsibility }
-------------------------[ YourRouter ]---------------------
192.168.1.1

What is the model of the Cisco? DO you normally Admin it yourself?

--
--
Dusty Harper
Microsoft Corporation
----------------------------------------------------------------------------
This posting is provided "AS IS", with NO warranties and confers NO rights
----------------------------------------------------------------------------

I am a newbie at networking and have a question. I have a cisco router that
is currently supplying dhcp to my local network with IP's in the 192.168.1.x
range. I want to use a win2003 server as my dhcp server. Will I absolutely
have to turn off dhcp in the router or can I just begin using dhcp from my
server and not expect any problems? I would like to use the range 192.168.1.x
because the router has an internal IP of 192.168.1.1. My ISP doesn't seem to
understand me when I ask if they can turn off DHCP on the router. I'm missing
why this question is so confusing to them. If anyone can explain this to me I
would be very grateful. Thanks

Adam

 

[Lanwench [MVP - Exchange]]

I am a newbie at networking and have a question. I have a cisco
router that is currently supplying dhcp to my local network with IP's
in the 192.168.1.x range. I want to use a win2003 server as my dhcp
server.

Much better idea.

Will I absolutely have to turn off dhcp in the router or can
I just begin using dhcp from my server and not expect any problems?

As long as you aren't using overlapping scopes, you won't have IP address
conflicts. But note that (internal) dynamic DNS updates will work a lot
better if you let the server handle it - you don't mention whether you're
using a domain/AD, but if you are, I'd definitely let the server handle
DHCP.

I
would like to use the range 192.168.1.x because the router has an
internal IP of 192.168.1.1. My ISP doesn't seem to understand me when
I ask if they can turn off DHCP on the router. I'm missing why this
question is so confusing to them.

It should be a pretty simple procedure for them. They shouldn't change the
LAN IP - just disable the DHCP server.
On your server, I'd set up a scope from 192.168.1.1 - .254 and exclude .1 -
..50 for static addresses and maybe also .200 - .254 as well.

If anyone can explain this to me I
would be very grateful. Thanks

Not sure how to do so other than I have!

 

[Dusty Harper {MS}]

Yes you can use the same subnet. The idea of a scope is that you can limit
the router to only handing out IPs in a certain range.

for example if you create a scope on the router for IPs 192.168.1.2 - 127,
and then create a scope on the Windows DHCP server for 192.168.1..28-254.
Notice that the scopes don't overlap. Now whoever's response is seen first
by the client should lease the address.

--
--
Dusty Harper
Microsoft Corporation
----------------------------------------------------------------------------
This posting is provided "AS IS", with NO warranties and confers NO rights
----------------------------------------------------------------------------

Dusty,

You are absolutely right that I should admin my router. I am currently not
at work but I think it is a cisco ubr900 series router. If I issue a
different scope could I use the same subnet? Remember, I am new to this. If
you could help I would greatly appreciate it.

You could use both the router and the Win2k3 server for DHCP. the thing
you'd need to worry about is the scopes. You don't want your scopes
overlapping or its possible that the same address could get assigned to
multiple machines.

I'm a little confused as to why your ISP would be the ones to turn off DHCP
on your router.

{ ISP's responsibility }{ Your Responsibility }
-------------------------[ YourRouter ]---------------------
192.168.1.1

What is the model of the Cisco? DO you normally Admin it yourself?

--

--

This posting is provided "AS IS", with NO warranties and confers NO

rights

--------------------------------------------------------------------------

--

seem
to to
me I