[lug] DHCP Question

[Gregory W. Seker]

You can try using the Windows ipconfig command line utility ... I know it is
available in XP ..
"ipconfig /registerdns" fixes these types of problems for me, but /release
and
/renew are also available.

c:\>ipconfig /?

USAGE:
    ipconfig [/? | /all | /renew [adapter] | /release [adapter] |
              /flushdns | /displaydns | /registerdns |
              /showclassid adapter |
              /setclassid adapter [classid] ]

where
    adapter         Connection name
                   (wildcard characters * and ? allowed, see examples)

    Options:
       /?           Display this help message
       /all         Display full configuration information.
       /release     Release the IP address for the specified adapter.
       /renew       Renew the IP address for the specified adapter.
       /flushdns    Purges the DNS Resolver cache.
       /registerdns Refreshes all DHCP leases and re-registers DNS names
       /displaydns  Display the contents of the DNS Resolver Cache.
       /showclassid Displays all the dhcp class IDs allowed for adapter.
       /setclassid  Modifies the dhcp class id.

The default is to display only the IP address, subnet mask and
default gateway for each adapter bound to TCP/IP.

For Release and Renew, if no adapter name is specified, then the IP address
leases for all adapters bound to TCP/IP will be released or renewed.

For Setclassid, if no ClassId is specified, then the ClassId is removed.

Examples:
    > ipconfig                   ... Show information.
    > ipconfig /all              ... Show detailed information
    > ipconfig /renew            ... renew all adapters
    > ipconfig /renew EL*        ... renew any connection that has its
                                     name starting with EL
    > ipconfig /release *Con*    ... release all matching connections,
                                     eg. "Local Area Connection 1" or
                                         "Local Area Connection 2"
----------------------------------------------------------------------------
---------------------------

FYI ... some other neat XP command line utilities I found out about on the
screen savers techtv show..
http://www.techtv.com/screensavers/windowstips/story/0,24330,3364544,00.html

My favorite:  "driverquery"

c:\>driverquery
Module Name  Display Name           Driver Type   Link Date
============ ====================== ============= ======================
ac97intc     Intel(r) 82801 Audio D Kernel        7/19/2001 6:43:40 PM
ACPI         Microsoft ACPI Driver  Kernel        8/29/2002 4:09:03 AM
ACPIEC       Microsoft Embedded Con Kernel        8/17/2001 4:57:55 PM
aec          Microsoft Kernel Acous Kernel        8/12/2002 1:54:24 PM
AFD          AFD Networking Support Kernel        8/29/2002 5:01:13 AM
AFS2K        AFS2k                  Kernel        12/13/2001 5:42:49 PM
agp440       Intel AGP Bus Filter   Kernel        8/17/2001 4:57:59 PM
AsyncMac     RAS Asynchronous Media Kernel        8/17/2001 4:55:29 PM
...
...
...

Enjoy,
Zeke

----- Original Message ----- 
From: "George Sexton" <gsexton at mhsoftware.com>
To: "'Boulder (Colorado) Linux Users Group -- General Mailing List'"
<lug at lug.boulder.co.us>
Sent: Saturday, December 06, 2003 9:19 AM
Subject: RE: [lug] DHCP Question


> Most likely, it kept track of who the lease was issued from and wanted
> to renew from them.
>
> I would try rebooting all of the affected machines.
>
> -----Original Message-----
> From: lug-bounces at lug.boulder.co.us
> [mailto:lug-bounces at lug.boulder.co.us] On Behalf Of Dan Ferris
> Sent: Friday, December 05, 2003 2:12 PM
> To: Boulder (Colorado) Linux Users Group -- General Mailing List
> Subject: [lug] DHCP Question
>
>
> Here is some interesting Questions.
>
> Last night, I changed out our Microsoft Windows NT DHCP server for a
> Linux DHCP server running ISC DHCPD.  This morning when I came in, about
>
> a third of the company couldn't talk to the network because their DHCP
> hadn't renewed with the new server.  They are all running some version
> or another of Microsoft Winblows.
>
> I always thought that it didn't matter what computer was a DHCP server
> so long as you only had 1 per subnet.  Is this true?  The old server is
> completely turned off and the service is set to manual.
>
> Is Windows always stupid about DHCP, or is it just me?
>
> Dan
>
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