Send dhcp-users mailing list submissions to
dhcp-users@lists.isc.org
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.isc.org/mailman/listinfo/dhcp-users
or, via email, send a message with subject or body 'help' to
dhcp-users-requ...@lists.isc.org
You can reach the person managing the list at
dhcp-users-ow...@lists.isc.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of dhcp-users digest..."
Today's Topics:
1. Re: Script to run on DHCPNAK (perl-list)
----------------------------------------------------------------------
Message: 1
Date: Thu, 20 Jul 2017 14:45:02 -0400 (EDT)
From: perl-list <perl-l...@network1.net>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Script to run on DHCPNAK
Message-ID:
<218577036.457663.1500576302041.javamail.zim...@network1.net>
Content-Type: text/plain; charset="utf-8"
I can be of no help then. I wish you luck!
> From: "Mark Spring" <mspr...@nktelco.com>
> To: "Users of ISC DHCP" <dhcp-users@lists.isc.org>
> Sent: Thursday, July 20, 2017 2:37:26 PM
> Subject: Re: Script to run on DHCPNAK
> Correct on the first paragraph.
> Not according to cable labs, it's considered a troubleshooting interface. I
> asked if there was a way to make the config sticky or set an expiration. No
> dice :s
> On Thu, Jul 20, 2017 at 2:35 PM perl-list < [ mailto:perl-l...@network1.net |
> perl-l...@network1.net ] > wrote:
>> I see .. so the cable modem is acting like a router until the cable circuit
>> totally comes up in which case it starts acting more like a bridge?
>> Last idea: Any chance that the cable modems could be told not to serve DHCP
>> under any circumstances? Like a default config?
>>> From: "Mark Spring" < [ mailto:mspr...@nktelco.com | mspr...@nktelco.com ] >
>>> To: "Users of ISC DHCP" < [ mailto:dhcp-users@lists.isc.org |
>>> dhcp-users@lists.isc.org ] >
>>> Sent: Thursday, July 20, 2017 2:28:29 PM
>>> Subject: Re: Script to run on DHCPNAK
>>> No, the 192 is a cable modem so not much control there. Any control I apply
>>> to
>>> it is lost until it boots...per cable labs spec.
>>> On Thu, Jul 20, 2017 at 2:27 PM perl-list < [ mailto:perl-l...@network1.net
>>> |
>>> perl-l...@network1.net ] > wrote:
>>>> Mark,
>>>> Is it the ISC server that is also handing out the 192.168.100.20 address
>>>> or a
>>>> different DHCP server? If its all the same server, I'm thinking class {}
>>>> statements and allow members of "class"; would be the appropriate fix right
>>>> inside the DHCP config...
>>>> If it is a different DHCP server that is ALSO ISC that you could modify,
>>>> you
>>>> could use class {} statements in there to cause it to ignore booting from
>>>> clients it shouldn't serve.
>>>>> From: "Mark Spring" < [ mailto:mspr...@nktelco.com | mspr...@nktelco.com
>>>>> ] >
>>>>> To: "Users of ISC DHCP" < [ mailto:dhcp-users@lists.isc.org |
>>>>> dhcp-users@lists.isc.org ] >
>>>>> Sent: Thursday, July 20, 2017 8:53:11 AM
>>>>> Subject: Re: Script to run on DHCPNAK
>>>>> The trouble is that the end device boots too quick and grabs the 192
>>>>> address
>>>>> from the modem(cable labs spec) then moments later it halts and asks for
>>>>> all
>>>>> the information that would normally be in the DHCP options. The lease
>>>>> from the
>>>>> modem expires, it requests...server NAK's it. It then gets all the proper
>>>>> info
>>>>> but the client doesn't read in all of the options. In a perfect world I
>>>>> have
>>>>> advised the vendor to read in the options and continue with the client.
>>>>> In the
>>>>> real world, I am trying to setup things so when I see a NAK, I execute a
>>>>> script...if it matches an OUI then I lookup the IP that it received, SSH
>>>>> into
>>>>> the client and reboot it. The modem is online and everything starts up
>>>>> normal.
>>>>> We are essentially building a reboot script into the client where it
>>>>> reboots if
>>>>> it fails to receive options the first time around.
>>>>> Hope this helps, thanks for replying!
>>>>> Mark Spring
>>>>> Information Systems Manager
>>>>> On Thu, Jul 20, 2017 at 8:45 AM, perl-list < [
>>>>> mailto:perl-l...@network1.net |
>>>>> perl-l...@network1.net ] > wrote:
>>>>>> Mark,
>>>>>> That is completely normal. The device 00:03:e6:6f:42:14 previously had an
>>>>>> address of 192.168.100.20 and attempted to renew such address.
>>>>>> Apparently that
>>>>>> address is not valid on the network your DHCP server is on. So, a NAK
>>>>>> was sent
>>>>>> followed by a discover from the client. The client and server then
>>>>>> negotiated a
>>>>>> 10.4.2.191 address.
>>>>>> What is the actual problem that you are having as I am not sure this has
>>>>>> anything to do with it...
>>>>>>> From: "Mark Spring" < [ mailto:mspr...@nktelco.com |
>>>>>>> mspr...@nktelco.com ] >
>>>>>>> To: "Users of ISC DHCP" < [ mailto:dhcp-users@lists.isc.org |
>>>>>>> dhcp-users@lists.isc.org ] >
>>>>>>> Sent: Thursday, July 20, 2017 8:31:30 AM
>>>>>>> Subject: Re: Script to run on DHCPNAK
>>>>>>> isc, just one server here is an example
>>>>>>> Jul 19 10:04:36 dhcp dhcpd: DHCPREQUEST for 192.168.100.20 from
>>>>>>> 00:03:e6:6f:42:14 via [ http://10.4.0.1/ | 10.4.0.1 ] : wrong net
>>>>>>> Jul 19 10:04:36 dhcp dhcpd: DHCPNAK on 192.168.100.20 to
>>>>>>> 00:03:e6:6f:42:14 via
>>>>>>> 10.4.0.1
>>>>>>> Jul 19 10:04:39 dhcp dhcpd: DHCPDISCOVER from 00:03:e6:6f:42:14 via
>>>>>>> 10.4.0.1
>>>>>>> Jul 19 10:04:40 dhcp dhcpd: DHCPOFFER on 10.4.2.191 to
>>>>>>> 00:03:e6:6f:42:14 via
>>>>>>> 10.4.0.1
>>>>>>> Jul 19 10:04:40 dhcp dhcpd: DHCPREQUEST for 10.4.2.191 (192.168.100.3)
>>>>>>> from
>>>>>>> 00:03:e6:6f:42:14 via 10.4.0.
>>>>>>> Jul 19 10:04:40 dhcp dhcpd: DHCPACK on 10.4.2.191 to 00:03:e6:6f:42:14
>>>>>>> via
>>>>>>> 10.4.0.1
>>>>>>> Mark Spring
>>>>>>> Information Systems Manager
>>>>>>> On Thu, Jul 20, 2017 at 8:22 AM, perl-list < [
>>>>>>> mailto:perl-l...@network1.net |
>>>>>>> perl-l...@network1.net ] > wrote:
>>>>>>>> Are the NAK and ACK coming from the same server? Can you post example
>>>>>>>> log
>>>>>>>> messages of the NAK and ACK and related communication? I assume this
>>>>>>>> is ISC
>>>>>>>> DHCP that we are speaking of and not some proprietary DHCP server?
>>>>>>>>> I am having some issues with network gear, and while arguing with
>>>>>>>>> vendors about
>>>>>>>>> who's problem it really is..I noticed that my device receives a NAK
>>>>>>>>> before it
>>>>>>>>> receives the proper IP address from our server(when the gear comes
>>>>>>>>> back
>>>>>>>>> online). If I can track this down in the logs then I can look for the
>>>>>>>>> ACK that
>>>>>>>>> follows, login to the device and reboot it properly.
>>>>>>>>> ___
>>>>>>>> _______________________________________________
>>>>>>>> dhcp-users mailing list
>>>>>>>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>>>>>>>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>>>>>>>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
>>>>>>> NKTelco
>>>>>>> 301 W. South St.
>>>>>>> New Knoxville, OH 45871
>>>>>>> Phone: 1-888-NKTELCO
>>>>>>> Fax: [ tel:(419)%20753-2950 | 419-753-2950 ]
>>>>>>> This message and the file(s) attached are confidential and proprietary
>>>>>>> information of NKTelco for the sole use of the intended recipient. Any
>>>>>>> unauthorized review, distribution, disclosure, copying, use, or
>>>>>>> dissemination, either whole or in part, is strictly prohibited. Do not
>>>>>>> transmit these documents, in any form, to any third party without the
>>>>>>> expressed written permission of NKTelco.
>>>>>>> _______________________________________________
>>>>>>> dhcp-users mailing list
>>>>>>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>>>>>>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>>>>>>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
>>>>>> _______________________________________________
>>>>>> dhcp-users mailing list
>>>>>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>>>>>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>>>>>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
>>>>> NKTelco
>>>>> 301 W. South St.
>>>>> New Knoxville, OH 45871
>>>>> Phone: 1-888-NKTELCO
>>>>> Fax: 419-753-2950
>>>>> This message and the file(s) attached are confidential and proprietary
>>>>> information of NKTelco for the sole use of the intended recipient. Any
>>>>> unauthorized review, distribution, disclosure, copying, use, or
>>>>> dissemination, either whole or in part, is strictly prohibited. Do not
>>>>> transmit these documents, in any form, to any third party without the
>>>>> expressed written permission of NKTelco.
>>>>> _______________________________________________
>>>>> dhcp-users mailing list
>>>>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>>>>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>>>>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
>>>> _______________________________________________
>>>> dhcp-users mailing list
>>>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>>>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>>>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
>>> --
>>> Mark Spring
>>> Information Systems Manager
>>> NKTelco
>>> 301 W. South St.
>>> New Knoxville, OH 45871
>>> Phone: 1-888-NKTELCO
>>> Fax: 419-753-2950
>>> This message and the file(s) attached are confidential and proprietary
>>> information of NKTelco for the sole use of the intended recipient. Any
>>> unauthorized review, distribution, disclosure, copying, use, or
>>> dissemination, either whole or in part, is strictly prohibited. Do not
>>> transmit these documents, in any form, to any third party without the
>>> expressed written permission of NKTelco.
>>> _______________________________________________
>>> dhcp-users mailing list
>>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
>> _______________________________________________
>> dhcp-users mailing list
>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
> --
> Mark Spring
> Information Systems Manager
> NKTelco
> 301 W. South St.
> New Knoxville, OH 45871
> Phone: 1-888-NKTELCO
> Fax: 419-753-2950
> This message and the file(s) attached are confidential and proprietary
> information of NKTelco for the sole use of the intended recipient. Any
> unauthorized review, distribution, disclosure, copying, use, or
> dissemination, either whole or in part, is strictly prohibited. Do not
> transmit these documents, in any form, to any third party without the
> expressed written permission of NKTelco.
> _______________________________________________
> dhcp-users mailing list
> dhcp-users@lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.isc.org/pipermail/dhcp-users/attachments/20170720/b547838f/attachment.html>
------------------------------
Subject: Digest Footer
_______________________________________________
dhcp-users mailing list
dhcp-users@lists.isc.org
https://lists.isc.org/mailman/listinfo/dhcp-users
------------------------------
End of dhcp-users Digest, Vol 105, Issue 18
*******************************************
