Re: How expand domain subnet?

As an aside, that would be a 22-bit subnet, not a 26-bit. A 26-bit
subnet would reduce the number of possible clients to 62 .

192.168.1.0/24 represents the subnet containing the addresses
192.168.1.1 through 192.168.1.254 . The 24-bit subnet mask is 255.255.255.0
.. 192.168.1.0/26 represents the subnet containing the addresses 192.168.1.1
through 192.168.1.62 . The subnet mask is 255.255.255.192 . An address like
192.168.1.73 would be in the next IP subnet of 192.168.1.64/26 .

I agree with Phillip. Stay with /24 . If you want groups of machines
to use different gateways, put them in their own 24-bit subnet and and point
them to a gateway in that subnet. If you want these groups to see each
other, route between the segments/subnets.

"Phillip Windell" <@.> wrote in message
news:uHyB7iC3GHA.3944@xxxxxxxxxxxxxxxxxxxxxxx
No.

Add a new segment. Don't create segments larger than /24. Keep the
maximum number of hosts per segment to 250-300,...which is what the /24
does with 254 hosts. Ethernet begins to loose efficiency with too many
hosts.

If you need more, create a new segment and place a LAN Router between the
segments.


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


"Newell White" <NewellWhite@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:666F68C3-FA7C-4ED1-8D1C-A6F7157DD064@xxxxxxxxxxxxxxxx
We currently have a 192.168.1/24 LAN with 2 fixed-IP Win2K3 DCs (AD
integrated, both WINS and DHCP), a fixed-IP PIX firewall, and dynamic-IP
XP
workstations, and VPN clients (managed by PIX firewall).

I want to expand this to a 192.168.0/26 LAN, and believe the necessary
steps
are:

1) Configure the primary DC TCP/IP to use 255.255.252.0 mask, repeat for
secondary DC.

2) Configure DHCP on each DC to use 192.168.0/26 scope, with
non-overlapping
lease pools (192.168.2/24, 192.168.3/24)

3) Expand inside subnet of PIX firewall to 192.168.0/26

Is it this simple, or have I overlooked something?

Later I wish to add further firewalls, each with own ADSL link. To assign
users to a particular firewall, I assume easiest method is to assign them
to
OUs with different logon scripts, which overwrite the DHCP-assigned
gateway
by means of a 'route add 0.0.0.0' command.

TIA,
--
Newell White




.

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