Re: DHCP Scopes

"Glenn" <nospam@xxxxxxxxx> wrote in message
news:OqsPEw4aJHA.3748@xxxxxxxxxxxxxxxxxxxxxxx
So, if I just had a Windows Server acting as DHCP plugged into an HP
ProCurve Switch, and I plugged a computer into the switch it would get an
IP from the DHCP server

The switch it irrelevant (if it is not a router).
The DHCP Server could be 52,000 miles away with 237 routers between the
Client and the DHCP Server,...and it will still work as long as the Router
being used by the Client is forwarding the Queries to the DHCP Server that
posseses a correct Scope for the Subnet the Client is in.

If I want to add another scope for a second VLAN, do I need to have a
router present?

Let's make it easier to explain and pretend that the term VLAN does not
exist. They are just subnets,..that's it,..they are just subnets. It makes
no difference if they are virtual or physical,..they are just sunets. So
the correct question would be

"If I have more than one subnet and I want them to communicate with
each other do I need a LAN Router sitting between them?"

Yes you do,...always.

Or is there a way to program the ProCurve to do it?

It depends on which of the gazzillion models of ProCurve you have. Some are
Layer3 Switches,...some are Layer2 Switches,.....Layer3 is required.

A Layer3 Switch is a Switch and a Router built into the same physical
device. *But* you have to treat it as two separate physical devices
depending on if you are dealing with Layer2 functionality or Layer3
functionality at the particular moment you are dealing with it.


--
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.
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Technet Library
ISA2004
http://technet.microsoft.com/en-us/library/cc302436(TechNet.10).aspx
ISA2006
http://technet.microsoft.com/en-us/library/bb898433(TechNet.10).aspx

Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Troubleshooting Client Authentication on Access Rules in ISA Server 2004
http://download.microsoft.com/download/9/1/8/918ed2d3-71d0-40ed-8e6d-fd6eeb6cfa07/ts_rules.doc

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.mspx

Microsoft ISA Server Partners: Partner Hardware Solutions
http://www.microsoft.com/forefront/edgesecurity/partners/hardwarepartners.mspx
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.

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