[isalist] Re: Extending a subnet
- From: Jerry Young <jerrygyoungii@xxxxxxxxx>
- To: isalist@xxxxxxxxxxxxx
- Date: Tue, 28 Sep 2010 16:16:38 -0400
Steve,
I'm not sure a 24-bit subnet mask is "standard", although it is probably the
most often used, and, technically speaking there are only 254 usable IP
addresses in that block (I know, I got a bit pedantic like Jim tends to). :)
For the purposes of this discussion, though, you'll probably have to get
fairly specific with how you've carved up your networks and the IP addresses
you've added. The next largest block you can use is a 23-bit subnet mask
but that essentially doubles the total number of usable IP addresses.
In general, though, you usually need to think in terms of IP address ranges
and then map backwards to required subnets.
So, when you say you've dual honed (I think you mean dual homed?) one
particular NIC to add an additional range of IP addresses, how did you
configure that NIC?
On Tue, Sep 28, 2010 at 3:57 PM, Steven Comeau
<scomeau@xxxxxxxxxxxxxxxxxx>wrote:
> ISA 2006, on Win 2k3.
>
>
>
> I have a situation where I need to add more IPs to a particular Internal
> Network than the standard 256. On our ISA server, I’ve dual honed the one
> particular NIC to add an additional range of IP addresses. I’ve also
> changed the network parameter in ISA to account for the additional IP
> range. Finally, I setup a Super Scope in DHCP to accommodate the new IP
> range. From my other sites (Dial Up VPN), and even from the other legs of
> the ISA server, there’s no issues bi-directionally getting to clients in the
> new IP range. However, I can’t seem to communicate between the two IP
> ranges on the same NIC. Is there some sort of routing thingy I need to do
> on the ISA box?
>
>
>
> Thanks in advance.
>
>
>
> Steve Comeau
>
> Associate Director of IT Rutgers Athletics
>
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> www.scarletknights.com
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--
Cordially yours,
Jerry G. Young II
Microsoft Certified Systems Engineer
Young Consulting & Staffing Services Company - Owner
www.youngcss.com
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