Expanding DHCP Scope

I currently have a scope of 19x.xxx.0.1 - 19x.xxx.0.254
I need to expand to add more IP's
Can I just change the range to 2.254 ?

hi,
if you want all to be on the same network you have to deal and with netmask
-but be aware at static IP's where you have to change and there the netmask
if you plan to route then you have to add on the new network a dhcp relay
agent and create another scope 2.0->2.254 or to create a superscope with
1.0->1.254 +2.0-2.254 and route theese 2 networks(dosent require a dhcp relay
agent)
--
Dragos CAMARA
MCSA Windows 2003 server


"Will Sellers" wrote:

> I currently have a scope of 19x.xxx.0.1 - 19x.xxx.0.254
> I need to expand to add more IP's
> Can I just change the range to 2.254 ?
>
>
>

You can do as you suggest as long as you use a netmask of 255.255.0.0. I
assume you are now using 255.255.255.0.

-Frank

"Will Sellers" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed). ..
>I currently have a scope of 19x.xxx.0.1 - 19x.xxx.0.254
> I need to expand to add more IP's
> Can I just change the range to 2.254 ?
>
>

Ethernet Segments should not be increased over 254 Hosts. If you need more
addresses then add a completely new subnet to the LAN Design.


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

The views expressed (as annoying as they are, and as stupid as they sound), are
my own and not those of my employer, or Microsoft, or anyone else associated
with me, including my cats.
-----------------------------------------------------

"Will Sellers" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed). ..
>I currently have a scope of 19x.xxx.0.1 - 19x.xxx.0.254
> I need to expand to add more IP's
> Can I just change the range to 2.254 ?
>
>

Please expand on your comment.

"Phillip Windell" <@.> wrote in message
news:(E-Mail Removed)...
> Ethernet Segments should not be increased over 254 Hosts. If you need
> more addresses then add a completely new subnet to the LAN Design.
>
>
> --
> Phillip Windell [MCP, MVP, CCNA]
> www.wandtv.com
>
> The views expressed (as annoying as they are, and as stupid as they
> sound), are my own and not those of my employer, or Microsoft, or anyone
> else associated with me, including my cats.
> -----------------------------------------------------
>
> "Will Sellers" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed). ..
>>I currently have a scope of 19x.xxx.0.1 - 19x.xxx.0.254
>> I need to expand to add more IP's
>> Can I just change the range to 2.254 ?
>>
>>
>
>

Ethernet is broadcast intensive. It doesn't matter what protocol runs above it
(TCP/IP, IPX/SPX, etc). When you go past 250-300 hosts the amount of broadcasts
on the "wire" cause the efficiency to drop. It is not noticed as much on a
faster LAN (like gigabit) to the "human eye" but the pattern is still the
same,...if you want the gigabit to still act like gigabit then follow the same
rule.

The purpose of using Masks for bigger segments is to SuperNet the segments into
one large one over "backbones" so that routing tables are kept small and
efficient,...but it is "expected" that the segment will be broken down futher
"downstream" so that when you get to where the Clients "live" the segments are
below 250-300 Hosts. The nice clean /24 bit mask does that perfectly with 254
hosts.

If you want "book-chapter-and verse" for reference, I do not have that. It is
just something I remembered from when I studied for the CCNA and probably could
never find it again. If anyone has some solid references, I would be glad to
have them.


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

The views expressed (as annoying as they are, and as stupid as they sound), are
my own and not those of my employer, or Microsoft, or anyone else associated
with me, including my cats.
-----------------------------------------------------


"Will Sellers" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed). ..
> Please expand on your comment.
>
> "Phillip Windell" <@.> wrote in message
> news:(E-Mail Removed)...
>> Ethernet Segments should not be increased over 254 Hosts. If you need more
>> addresses then add a completely new subnet to the LAN Design.
>>
>>
>> --
>> Phillip Windell [MCP, MVP, CCNA]
>> www.wandtv.com
>>
>> The views expressed (as annoying as they are, and as stupid as they sound),
>> are my own and not those of my employer, or Microsoft, or anyone else
>> associated with me, including my cats.
>> -----------------------------------------------------
>>
>> "Will Sellers" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed). ..
>>>I currently have a scope of 19x.xxx.0.1 - 19x.xxx.0.254
>>> I need to expand to add more IP's
>>> Can I just change the range to 2.254 ?
>>>
>>>
>>
>>
>
>