Re: DHCP multinet / superscope question

Tech-Archive recommends: Speed Up your PC by fixing your registry

I wanted to add a few things I never saw mentioned.

1. Class are meaningless (for the most part). They were relevant in the
1980's and early 1990's,....not anymore. The are one RFC Private Address
range for each Class,...it doesn't matter which you use,...but just use a
/24 bit mask with them (255.255.255.0)

2. Due to Ethernet efficientcy limitations, Subnets should not be allowed to
get larger than 250-300 Hosts because Broadcasts will climb too high. This
means a 24bit Mask and nothing less than that (255.255.255.0). You can make
the subnets smaller (/24+) but not bigger (-/24). So if there are less
than 254 Hosts per floor then you want a /24 bit subnet on each floor. If
there are more hosts than that then use two /24 subnets on each floor giving
you 508 Hosts per Floor. Your Layer3 Switch with VLANs can do 4 subnets
just as easy as it can do two. There would be very little cable changes if
any,...so there is really no additional work or cost involved between one
subnet per floor vs two subnets per floor.

3. Do not fall prey to the temptation of using Superscopes on the DHCP
Server. Use separate distinct independent Scopes for each subnet.
SuperScopes are for Multi-Netting,...you are not Multi-Netting here.

4. Enable DHCP Relaying (DHCP Helper Addresess) on the Router (Layer3
Switch) as I believe that has been mentioned.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------


<connor_a@xxxxxxxxxxx> wrote in message
news:eea249e1-c3f5-408f-b42f-443efae3ad23@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi everyone,

If I work in an office where two floors of PC's are connected via a
single switch and are using a windows 2003 DC with DHCP/DNS.

How can I allocate a class A range of IP addresses for the 1st floor
and a class B range of IP addresses for the second floor with a single
DHCP server and a single switch.

Thanks in advance!


.

Relevant Pages

  • Network Configuration
    ... We currently have three router/hub/switches one, for each floor of our ... We have numerous subnets which are now randomly scattered all over ... Currently the majority of the ...
    (microsoft.public.win2000.networking)
  • Re: Whats better a few big subnets or several smaller subnets?
    ... Class C subnets with subnet masks of either 255.255.0.0 or 255.255.255.0. ... on each floor. ... Summarized route for entire floor: ... I would use network 10 addressing as it would allow you to put some ...
    (comp.dcom.sys.cisco)
  • Re: force all users profiles on the computer
    ... Unfortunately the subnets are some what shared between floors pretty much. ... need read-only profile. ... We'd like to accomplish something like below. ... Any users who logon to the computers on the first floor to get this ...
    (microsoft.public.windows.server.active_directory)
  • Re: Running out of DHCP address leases howto rectify?
    ... which also hosts DNS and DHCP for 4 floors. ... We have about 20 DHCP leases available on the existing 147.109.x.y ... This subnet needs to be migrated to a 10.16.128.0/23 subnet range ... If you want to keep with the separate subnets for each floor, ...
    (microsoft.public.windows.server.general)
  • Re: Running out of DHCP address leases howto rectify?
    ... which also hosts DNS andDHCPfor 4 floors. ... This subnet needs to be migrated to a 10.16.128.0/23 subnet range ... If you want to keep with the separatesubnetsfor each floor, ... Change the DC/DNS servers IPs ...
    (microsoft.public.windows.server.general)