[isalist] Re: OT: DHCP and static addresses
- From: "Jerry Young" <jerrygyoungii@xxxxxxxxx>
- To: isalist@xxxxxxxxxxxxx
- Date: Wed, 16 Jan 2008 14:51:39 -0500
Not sure I'd use DHCP in even that case for servers. If I needed to make a
mass change, I'd use a script.
I agree with T wholeheartedly. :)
--
Cordially yours,
Jerry G. Young II
Microsoft Certified Systems Engineer
On 1/10/08, Greg Mulholland <gmulholland@xxxxxxxxxxxx> wrote:
>
> http://www.ISAserver.org
> -------------------------------------------------------
>
> Having said that i have in previous times used dhcp. I keep DNS and DHCP
> static and build all servers with dhcp. That way when i update DNS and
> DHCP servers, which happened enough for it to be worthwhile, i only have
> to do it in one spot and not across 30 servers.
>
> Greg
>
> > Well, yes - the gateway itself should have a fixed IP, and the gateway
> > on your servers should be fixed as well (if they need that entry). But
> > gateway's via DHCP is fine (and expected).
> >
> >
> >
> > t
> >
> >
> >
> > From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
> > On Behalf Of D PIETRUSZKA USWRN INTERLINK INFRA ASST MGR
> > Sent: Thursday, January 10, 2008 11:05 AM
> > To: isalist@xxxxxxxxxxxxx
> > Subject: [isalist] Re: OT: DHCP and static addresses
> >
> >
> >
> > Then I should change my gateway to fix ip, right? probably that will
> > help with some issues I was experiencing on the network
> >
> >
> >
> > Regards
> >
> > Diego R. Pietruszka
> >
> > MSC (USA) - Interlink Transport Technologies
> >
> >
> >
> > From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
> > On Behalf Of Thor (Hammer of God)
> > Sent: Thursday, January 10, 2008 12:21 PM
> > To: isalist@xxxxxxxxxxxxx
> > Subject: [isalist] Re: OT: DHCP and static addresses
> >
> >
> >
> >
> >
> > My buck o' five-- (and not necessarily a reply to your post Tom)
> >
> >
> >
> > Best practices actually dictate that server resources NOT use DHCP, even
> > if the address is reserved. In fact, some server services require
> > static IP's (like, um, DHCP ;). This is because it creates a single
> > point of failure against server resources, which, by their nature, are
> > "static." When the end result is the same, that being the machine
> > always getting the same IP address, having a server depend on another
> > server (DHCP) just increases potential failure rates - particularly when
> > multiple-system restarts present boot-order problems.
> >
> >
> >
> > The question you have to ask is "what do I gain by using reserved IP's
> > in DHCP?" When it comes to servers, the answer is "nothing." In fact,
> > you actually lose.
> >
> >
> >
> > DHCP is for clients... in networks of any consequence, you always have
> > more than one DHCP server with non-overlapping scopes carved out within
> > a given subnet even if you are using DHCP relay from off-subnet clients.
> > In the case of clients, reservations are perfectly acceptable in cases
> > when you need to easily and consistently match a given IP (as in logs,
> > etc) to a specific client. You would make the reservation on all DHCP
> > servers in scope for redundancy. There are any number of reasons one
> > may choose to use reservations for clients, but as others have stated,
> > any device with a primary purpose of hosting services should have a
> > static IP so that it will always have it no matter what.
> >
> >
> >
> > t
> >
> >
> >
> >
> >
> > From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
> > On Behalf Of Thomas W Shinder
> > Sent: Thursday, January 10, 2008 6:41 AM
> > To: isalist@xxxxxxxxxxxxx
> > Subject: [isalist] Re: OT: DHCP and static addresses
> >
> >
> >
> > I tend to avoid DHCP reservations for the same reason that Jim notes.
> > They suffer from the same kind of network amnesia that hosts and lmhosts
> > files have.
> >
> >
> >
> > Thomas W Shinder, M.D.
> > Site: www.isaserver.org <http://www.isaserver.org/>
> > Blog: http://blogs.isaserver.org/shinder/
> > Book: http://tinyurl.com/3xqb7
> > MVP -- Microsoft Firewalls (ISA)
> >
> >
> >
> >
> >
> > ________________________________
> >
> > From: isalist-bounce@xxxxxxxxxxxxx
> > [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Harrison
> > Sent: Thursday, January 10, 2008 8:09 AM
> > To: isalist@xxxxxxxxxxxxx
> > Subject: [isalist] Re: OT: DHCP and static addresses
> >
> > I prefer static for servers & devices (print servers, etc.);
> > DHCP for all else..
> >
> > If you ever replace a server NIC and you forget to change the
> > MAC in the DHCP reservation, your server could be unavailable until you
> > either re-register the IP or fix the reservation.
> >
> > It's just a question of "how solid is your process control?"
> >
> >
> >
> > Jim
> >
> >
> >
> >
> >
> > From: isalist-bounce@xxxxxxxxxxxxx
> > [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Amy Babinchak
> > Sent: Thursday, January 10, 2008 5:49 AM
> > To: isalist@xxxxxxxxxxxxx
> > Subject: [isalist] Re: OT: DHCP and static addresses
> >
> >
> >
> > I always use the DHCP method. I don't know that there is a
> > better. I think it's simply a choice.
> >
> >
> >
> > From: isalist-bounce@xxxxxxxxxxxxx
> > [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Nathan
> > Sent: Thursday, January 10, 2008 8:34 AM
> > To: isalist@xxxxxxxxxxxxx
> > Subject: [isalist] OT: DHCP and static addresses
> >
> >
> >
> > To you network guys out there...
> >
> >
> >
> > When you give a device a static address, be it a server, switch,
> > printer etc., do you think it is better to hardcode the address into the
> > device or allocate the address using DHCP and the MAC address.
> >
> >
> >
> > Thanks
> >
> >
> >
> > Nathan
> >
> >
> > ExchangeDefender Message Security: Check Authenticity
> > <http://www.exchangedefender.com/verify.asp?id=m0ADnXb6014228&from=amy@h
> > arborcomputerservices.net>
> >
> >
>
>
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