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DHCP Not releasing on different subnets

 
 
=?Utf-8?B?TW9yZ2Fu?=
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      10-25-2004, 05:57 PM
I have a Win2k server running DHCP configured for a superscope for four
different subnets.

DHCP work over the router at every location no problem.
But for the remote user after go from one location to another
DHCP will not release it keep the same address from the previous location
even after doing an Ipconfig /release and /renew , same IP coms up.

please advise
 
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Phillip Windell
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      10-25-2004, 06:09 PM
Get rid of the Superscope. Run a separate scope for each subnet. Do some
research on the purpose of a Superscope and you will find they are not for
what you are doing. They make all the scopes within them behave as a single
scope. I believe they are also used when multiple subnets run on the same
logical "wire" although I am not that familiar with doing it that way and
consider it a bad idea in the first place.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


"Morgan" <(E-Mail Removed)> wrote in message
news:B1ED7B2C-8DB2-4DFF-876A-(E-Mail Removed)...
> I have a Win2k server running DHCP configured for a superscope for four
> different subnets.
>
> DHCP work over the router at every location no problem.
> But for the remote user after go from one location to another
> DHCP will not release it keep the same address from the previous location
> even after doing an Ipconfig /release and /renew , same IP coms up.
>
> please advise



 
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=?Utf-8?B?bW9yZ2Fu?=
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      10-25-2004, 06:43 PM
Phillip,

even though these are physically remote location?



"Phillip Windell" wrote:

> Get rid of the Superscope. Run a separate scope for each subnet. Do some
> research on the purpose of a Superscope and you will find they are not for
> what you are doing. They make all the scopes within them behave as a single
> scope. I believe they are also used when multiple subnets run on the same
> logical "wire" although I am not that familiar with doing it that way and
> consider it a bad idea in the first place.
>
> --
>
> Phillip Windell [MCP, MVP, CCNA]
> www.wandtv.com
>
>
> "Morgan" <(E-Mail Removed)> wrote in message
> news:B1ED7B2C-8DB2-4DFF-876A-(E-Mail Removed)...
> > I have a Win2k server running DHCP configured for a superscope for four
> > different subnets.
> >
> > DHCP work over the router at every location no problem.
> > But for the remote user after go from one location to another
> > DHCP will not release it keep the same address from the previous location
> > even after doing an Ipconfig /release and /renew , same IP coms up.
> >
> > please advise

>
>
>

 
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Phillip Windell
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      10-25-2004, 06:50 PM
Geography is meaningless, the DHCP setup doesn't care if they are 500 miles
away or 50 feet away in the next room.

However the system would be better off with a DHCP at each location that
serves the particular subnets at that location. You don't want a WAN link
to go down because someone forty miles away cut a line with a backhoe and
leave the remote machines "helpless" without a DHCP to get their network
configuration from. Remote networks need to be designed so they are at least
semi-independent and can at least function to a certain degree even if they
are cut off from the outside world.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

"morgan" <(E-Mail Removed)> wrote in message
news:2428AA44-EB89-4366-B79A-(E-Mail Removed)...
> Phillip,
>
> even though these are physically remote location?
>
>
>
> "Phillip Windell" wrote:
>
> > Get rid of the Superscope. Run a separate scope for each subnet. Do

some
> > research on the purpose of a Superscope and you will find they are not

for
> > what you are doing. They make all the scopes within them behave as a

single
> > scope. I believe they are also used when multiple subnets run on the

same
> > logical "wire" although I am not that familiar with doing it that way

and
> > consider it a bad idea in the first place.
> >
> > --
> >
> > Phillip Windell [MCP, MVP, CCNA]
> > www.wandtv.com
> >
> >
> > "Morgan" <(E-Mail Removed)> wrote in message
> > news:B1ED7B2C-8DB2-4DFF-876A-(E-Mail Removed)...
> > > I have a Win2k server running DHCP configured for a superscope for

four
> > > different subnets.
> > >
> > > DHCP work over the router at every location no problem.
> > > But for the remote user after go from one location to another
> > > DHCP will not release it keep the same address from the previous

location
> > > even after doing an Ipconfig /release and /renew , same IP coms up.
> > >
> > > please advise

> >
> >
> >



 
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=?Utf-8?B?bW9yZ2Fu?=
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      10-25-2004, 07:05 PM

Having DHCP not cost effective if there are only 3 to four workstations at
these locations. routing with IP helper works great.

although you suggest getting rid of superscope?


"Phillip Windell" wrote:

> Geography is meaningless, the DHCP setup doesn't care if they are 500 miles
> away or 50 feet away in the next room.
>
> However the system would be better off with a DHCP at each location that
> serves the particular subnets at that location. You don't want a WAN link
> to go down because someone forty miles away cut a line with a backhoe and
> leave the remote machines "helpless" without a DHCP to get their network
> configuration from. Remote networks need to be designed so they are at least
> semi-independent and can at least function to a certain degree even if they
> are cut off from the outside world.
>
> --
>
> Phillip Windell [MCP, MVP, CCNA]
> www.wandtv.com
>
> "morgan" <(E-Mail Removed)> wrote in message
> news:2428AA44-EB89-4366-B79A-(E-Mail Removed)...
> > Phillip,
> >
> > even though these are physically remote location?
> >
> >
> >
> > "Phillip Windell" wrote:
> >
> > > Get rid of the Superscope. Run a separate scope for each subnet. Do

> some
> > > research on the purpose of a Superscope and you will find they are not

> for
> > > what you are doing. They make all the scopes within them behave as a

> single
> > > scope. I believe they are also used when multiple subnets run on the

> same
> > > logical "wire" although I am not that familiar with doing it that way

> and
> > > consider it a bad idea in the first place.
> > >
> > > --
> > >
> > > Phillip Windell [MCP, MVP, CCNA]
> > > www.wandtv.com
> > >
> > >
> > > "Morgan" <(E-Mail Removed)> wrote in message
> > > news:B1ED7B2C-8DB2-4DFF-876A-(E-Mail Removed)...
> > > > I have a Win2k server running DHCP configured for a superscope for

> four
> > > > different subnets.
> > > >
> > > > DHCP work over the router at every location no problem.
> > > > But for the remote user after go from one location to another
> > > > DHCP will not release it keep the same address from the previous

> location
> > > > even after doing an Ipconfig /release and /renew , same IP coms up.
> > > >
> > > > please advise
> > >
> > >
> > >

>
>
>

 
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Phillip Windell
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      10-25-2004, 07:13 PM
"morgan" <(E-Mail Removed)> wrote in message
news:AD256D89-26F7-403E-9085-(E-Mail Removed)...
>
> Having DHCP not cost effective if there are only 3 to four workstations at
> these locations. routing with IP helper works great.


Static addressing would also work great.

> although you suggest getting rid of superscope?


Most definitely. Just move each scope out of the Superscope. When the last
one is removed the Superscope disappears by itself.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


 
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Matt Anderson
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      10-26-2004, 03:39 AM

"morgan" <(E-Mail Removed)> wrote in message
news:AD256D89-26F7-403E-9085-(E-Mail Removed)...
>
> Having DHCP not cost effective if there are only 3 to four workstations at
> these locations. routing with IP helper works great.
>
> although you suggest getting rid of superscope?
>

They can be part of the 'main' subnet remember even if they are in remote
locations. Also could be in the same site etc.

Matt
MCT, MCSE


 
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