Are you using a special Dynamic DNS update client, or relying on some 
functionality in dhclient?  Is the DHCP server a MS DHCP server, that 
could update AD/DNS for you?  It seems from your ping that the DNS entry 
which your Win2k side registers lingers for a little while, long enough 
for you to reboot into FreeBSD.  On Win2k shutdown, the address is 
de-registered (unless configured differently) from DDNS, so unless you 
are using a DDNS update client to re-register on the FreeBSD side, the 
registration won't work for too long.  But the deregistration can take a 
few minutes, depending on how busy the server is, so you might get 
response from your entry for a few minutes after Win2k shutdown.
-Matt

Ross Lippert wrote:

>OK, here is /etc/resolv.conf:
>search celera.com ad.celera.com rkv.ad.celera.com rkv.celera.com applera.com pe-c.com 
>ssf.ad.celera.com fc.celera.com
>nameserver 172.20.7.10
>nameserver 172.20.7.11
>
>The search line there appears to be the result of adding a supercede
>line to the dhclient.conf, which is as follows:
>interface "ep0" {
>   supersede domain-name "celera.com ad.celera.com rkv.ad.celera.com rkv.celera.com 
>applera.com pe-c.com ssf.ad.celera.com fc.celera.com";
>   request subnet-mask, broadcast-address, time-offset, routers,
>        domain-name, domain-name-servers, host-name;
>}
>
>The above contents are just a total guess based on what the
>Win-support person seemed to be doing.
>
>I visited the win2k side again, to check my name list and so forth,
>and did 
>CMD> ipconfig /all
>The primary name is lipperra-p1, and the connection specific one is
>rkv.ad.celera.com.
>
>I am not sure if that is reflected in my resolv.conf or my dhclient.conf.
>
>Finally, on the boot back to FreeBSD, I ran a ping from my desktop machine
>and watched the disappearance from DNS:
> cglwadministrator@LIPPERRA-W1 ~
> $ ping lipperra-p1.rkv.ad.celera.com
> 
> Pinging lipperra-p1.rkv.ad.celera.com [172.20.168.104] with 32 bytes of data:
> Reply from 172.20.168.104: bytes=32 time<10ms TTL=128
> Request timed out.
> Request timed out.
> Reply from 172.20.168.104: bytes=32 time<10ms TTL=64
> Request timed out.
> 
> cglwadministrator@LIPPERRA-W1 ~
> $ ping lipperra-p1.rkv.ad.celera.com
> Bad IP address lipperra-p1.rkv.ad.celera.com.
>
>which may be of interest because it shows the DNS entry being persistent
>right up until just after FreeBSD's dhclient starts, and then the DNS
>entry disappears.
>
>-r
>
>  
>
>>From: "David" <[EMAIL PROTECTED]>
>>To: "Ross Lippert" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
>>Cc: <[EMAIL PROTECTED]>
>>References: <[EMAIL PROTECTED]>
>>Subject: Re: MS Dynamic DNS problems
>>Date: Thu, 18 Jul 2002 08:11:59 -0700
>>MIME-Version: 1.0
>>Content-Type: text/plain;
>>      charset="iso-8859-1"
>>Content-Transfer-Encoding: 7bit
>>X-Priority: 3
>>X-MSMail-Priority: Normal
>>X-Mailer: Microsoft Outlook Express 6.00.2600.0000
>>X-Mimeole: Produced By Microsoft MimeOLE V6.00.2600.0000
>>
>>----- Original Message -----
>>    
>>
>>>Thanks for the quick reply, Steve.
>>>
>>>I suspect that since they were about to modify my laptop's win2k install
>>>so that it started showing up in DNS, that there must be something doable
>>>on the client-side alone, if only I knew what that was.
>>>
>>>I have since rebooted to win2k to look at the configuration panel that was
>>>changed to get the fix.  It is the "advanced" popup under the DNS tab in
>>>      
>>>
>>the
>>    
>>
>>>TCP/IP properties (gosh why can't people just use directories).
>>>
>>>The suffix list used to be empty, and unchecked, and now it is
>>>populated and checked, as previously described.  Secondly, I have
>>>noticed a checkbox at the bottom of this panel of the form "use suffix
>>>in registration" which might have also been checked during the fix.
>>>
>>>While win2k was up, I was able to ping the laptop.  Then I rebooted to
>>>FreeBSD (getting the same IP addr from DHCP) and pinged again and my DNS
>>>entry had disappeared, no ping.  Though pings by raw IP addr work fine.
>>>
>>>      
>>>
>>There are a couple palces in your /etc directory you may want to look.
>>
>>For example, the settings you indicate they added are usually stored in the
>>/etc/resolv.conf file.  Make sure you have the proper domain specified
>>there.  Also make sure your fully-qualified domain name includes the
>>appropriate domain, and the same name as the Win2k side of your machine.
>>
>>David
>>
>>
>>
>>    
>>
>
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>  
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