Re: sunray/dhcp config
From: Ottomeister (ottomeister_at_my-deja.com)
Date: 02/26/04
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Date: 26 Feb 2004 12:55:53 -0800
Bill Clarke <llib+news@computer.org> wrote in message news:<403d878a$1@clarion.carno.net.au>...
> - subnet A.B.C.0
> - router is A.B.C.1
> - sun ray server is A.B.C.9 (and only has the one network interface)
> - there are many other servers on this subnet, including dhcp servers
> (all outside my control).
>
> i would like to have our few sun ray machines given IP addresses in a
> known fixed range (e.g., A.B.C.128 - A.B.C.139). is this possible?
It's possible, but it will require you to manually configure the DHCP
service on the Sun Ray server to only issue IP addresses to the MAC
addresses of the Sun Ray units.
> will our server's dhcp server "play nice" with other dhcp servers?
> i.e., will our server only deal with sun ray requests? this is unclear
> from the documentation.
The only way to get the Solaris DHCP server to issue addresses only to
your Sun Rays is to hard-code the Sun Ray MAC addresses into the DHCP
network table and leave no IP addresses spare for assignment to any
other MAC addresses. The Solaris DHCP server is not able to make an
address allocation decision on the basis of a client device identifier,
so you can't tell it to issue addresses only to devices that identify
themselves as Sun Rays. This is beyond the scope of the Sun Ray DHCP
configuration helper ('utadm'), that's why it has to be done manually
through 'dhcpmgr' or, if you're a hard-core DHCP dude, 'pntadm'.
The other thing you'll have to do is to prevent the other DHCP
servers from issuing addresses to the Sun Rays. How you do that will
depend on what those other servers are.
If you're mostly concerned that DHCP running on the Sun Ray server
will interfere with the existing devices or other DHCP servers then
you can configure it so that it doesn't issue any IP addresses at
all, but provides only the additional information requested by Sun
Ray devices after they've acquired their IP addresses from one of
the other DHCP servers. This is usually the safest way to add Sun
Rays to a network that already has DHCP service. This is one of
the scenarios described in a new Online Blueprint "Sun Ray
Deployment On Shared Networks" which you can find at
<http://www.sun.com/solutions/blueprints/online.html>.
OttoM.
-- ottomeister (no longer @my-deja, now @mail.com) Disclaimer: These are my opinions. I do not speak for my employer.
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