[Ext] Re: Static IP and IP management

[Bernard Fay]

Thanks Victoria,  I'll take a look at it for sure.  The way you present it,
it might be something we were looking since a while,

Thanks,
Bernard

On Wed, Feb 24, 2016 at 2:21 PM, Victoria Risk <vicky at isc.org> wrote:

> Bernard,
>
> I don’t have any experience with it, but there is an open source tool that
> aims to do exactly what you are looking for, document what is on the
> network, what addresses are in use, and which are available.  It also has
> some integration with both ISC DHCP and BIND.
> It is NetDot (network documentation), published by the University of
> Oregon … https://osl.uoregon.edu/redmine/projects/netdot
>
> Does anyone on the list have feedback about NetDot? Any users here?
>
> Vicky
>
> On Feb 24, 2016, at 10:20 AM, Bernard Fay <bernard.fay at gmail.com> wrote:
>
> This is interesting!  I'll have to find out how to write such scripts.
> Would you have some pointers related to this subject?
>
> Thanks Jim
>
> On Wed, Feb 24, 2016 at 10:00 AM, Jim Glassford <jmglass at iup.edu> wrote:
>
>> Hi,
>>
>> This works for us, ymmv. We use home grown scripts that pull information
>> from a database to build our dhcpd.conf and dns files for all static
>> assignments.  We also have different scripts that pull the arp tables from
>> the routers each hour and from layer two switches ports to keep track of
>> who is where.
>>
>> Put these together to keep some control for IPAM, sure the commercial
>> products do a better job.
>>
>> As part of the hour run script, we do a compare on what is found in arp
>> tables to what we have in the assigned database. If a match, the MAC and IP
>> address match what is in the database, update a count field and the date it
>> was found. If a MAC is found in arp table does not match the assigned IP
>> address, send and email for a discrepancy (someone hard coded when they
>> should not or other issue that needs addressed)
>> Once in awhile (when I need more static IP addresses for a subnet) review
>> the count and last updated fields, if older than a year +/- then safe to
>> re-assign this IP address.
>>
>> best!
>> jim
>>
>>
>> On 2/24/2016 9:16 AM, Bernard Fay wrote:
>>
>> I manage a lab where there is about 300-400 IPs assigned to different
>> network equipments, physical and virtual servers.  So IPs might be assigned
>> for a while then equipments removed because not needed anymore, remember
>> this is a lab.  I would like to know which IPs are in used or not.
>> Equipments removed means IPs not used anymore so we could reuse those IPs.
>>
>> I hope I am clear enough
>> Thanks,
>>
>>
>> On Wed, Feb 24, 2016 at 9:06 AM, Patrick Trapp <ptrapp at nex-tech.com>
>> wrote:
>>
>>> I believe a helpful answer will require some context. You haven't told
>>> us what issues you are having with IP management, so it's going to be
>>> difficult to identify how static IP's might be beneficial.
>>>
>>> Are you having a specific issue you wish to address?
>>>
>>> ------------------------------
>>> *From:* <dhcp-users-bounces at lists.isc.org>
>>> dhcp-users-bounces at lists.isc.org [dhcp-users-bounces at lists.isc.org] on
>>> behalf of Bernard Fay [ <bernard.fay at gmail.com>bernard.fay at gmail.com]
>>> *Sent:* Wednesday, February 24, 2016 7:39 AM
>>> *To:* Users of ISC DHCP
>>> *Subject:* Static IP and IP management
>>>
>>> Hello everyone,
>>>
>>> I have been told that static IP assignation can help in IP management.
>>> Of course, I can know which IPs are assigned by looking in dhcpd.conf.  But
>>> after a while an IP might not be used anymore and nothing in dhcpd or bind
>>> will tell me if it still in use or not.  I have setup a lab to experiment
>>> where I have configured dhcpd and bind and I cannot find out how static IP
>>> can really help in IP management.
>>>
>>> Did I miss something somewhere?
>>>
>>> Thanks,
>>> B
>>>
>>>
>>> _______________________________________________
>>> dhcp-users mailing list
>>> dhcp-users at lists.isc.org
>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>>
>>
>>
>>
>> _______________________________________________
>> dhcp-users mailing listdhcp-users at lists.isc.orghttps://lists.isc.org/mailman/listinfo/dhcp-users
>>
>>
>>
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
> Victoria Risk
> Internet Systems Consortium
> vicky at isc.org
>
>
>
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at 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/20160225/a22f9b5c/attachment-0001.html>