Date: Tue, 2 Feb 1999 17:31:19 -0600 (CST) From: "Jasper O'Malley" <jooji@webnology.com> To: Terry Lambert <tlambert@primenet.com> Cc: wghicks@bellsouth.net, jcwells@u.washington.edu, freebsd-chat@FreeBSD.ORG Subject: DHCP Autoconfig (Was: Lets Endorse KDE) Message-ID: <Pine.LNX.4.02.9902021724330.31014-100000@mercury.webnology.com> In-Reply-To: <199902022307.QAA06687@usr09.primenet.com>
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On Tue, 2 Feb 1999, Terry Lambert wrote:
> Hm. My experience is that it comes up on the 10.x.x.x net.
I've never seen that. There was a big discussion about it on the ISC DHCP
mailing list when Win98 retail was released.
> This would make sense, in that the statistical protection is 256
> times better than the 169.254.x.x net.
If I'm not mistaken, the autoconfiguration process checks the address it
picks before it sticks with it. From the IETF Internet Draft on the
subject:
Once a DHCP Client has determined it must auto-configure an IP
address, it chooses an address. The algorithm for choosing an
address is implementation dependant. The address range to use MUST
be "169.254/16", which is registered with the IANA as the LINKLOCAL
net.
If choosing an address in this range, the DHCP Client MUST not use
the first 256 or the last 256, as these are reserved for future use.
When an address is chosen, the DHCP Client MUST test to see if the
address is already in use. If the network address appears to be in
use, the client MUST choose another address, and try again. The
client MUST keep choosing addresses until it either finds one, or it
has tried more then the autoconfig-retry count. The autoconfig-
retry count is implementation specific, and should be based on the
algorithm used for choosing an IP address. This retry count is
present to make sure that DHCP Clients auto-configuring on busy
auto-configured network segments do not loop infinitely looking for
an IP address.
> Are you perhaps running an early/MSDN release of Windows 98?
Nope. Standard OEM release.
Cheers,
Mick
The Reverend Jasper P. O'Malley dotdot:jooji@webnology.com
Systems Administrator ringring:asktheadmiral
Webnology, LLC woowoo:http://www.webnology.com/~jooji
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