Graphing DHCP pools

[David Ramage]

Sorry for the ambiguity.  I use dhcpd-snmp.

I added this line to snmpd.conf on my dhcp server after installing dhcpd-snmp:

pass_persist .1.3.6.1.4.1.21695.1.2 /opt/dhcpd-snmp/dhcpd-snmp /opt/dhcpd-snmp/dhcpd-snmp.conf

Here’s an example dhcpd-snmp.conf:

leases: /var/lib/dhcp/dhcpd.leases
pool: 1, "POOL 1 a_pool", 10.3.0.2-10.3.0.254
pool: 2, "POOL 2 another_pool", 10.4.0.2-10.4.0.254

Each of these pools now has a few pollable OIDs associated with them, which will in turn return the number of available addresses in the pool.  1.3.6.1.4.1.21695.1.2.2.6.1 is for the first pool, 1.3.6.1.4.1.21695.1.2.2.6.2 for the second, etc.

I think there may be other OIDs that return other statistics, but I cannot remember them offhand.

From: dhcp-users [mailto:dhcp-users-bounces at lists.isc.org] On Behalf Of project722
Sent: Wednesday, December 06, 2017 7:58 AM
To: Users of ISC DHCP <dhcp-users at lists.isc.org>
Subject: Re: Graphing DHCP pools

I'm looking into the dhcpd-snmp tool. I've downloaded the files, and they are working correctly. I'm at the part of the instructions where is says "it can now be installed in Net-SNMP".

 https://github.com/ohitz/dhcpd-snmp
I'm not the best with SNMP, and my team does not have our own NMS. That being said, I am looking into standing one up. But, first, can someone tell me where Net-SNMP needs to be installed? Is that on the DHCP server itself or the NMS? Can someone suggest a good open source NMS that can run on Red Hat/Cent and can then graph this data that it collects?

On Wed, Dec 6, 2017 at 8:20 AM, project722 <project722 at gmail.com<mailto:project722 at gmail.com>> wrote:
David, which one are you referring to? dhcpd-snmp or dhpool.pl<http://dhpool.pl>?

On Mon, Dec 4, 2017 at 10:29 AM, David Ramage <dramage at lsnetworks.net<mailto:dramage at lsnetworks.net>> wrote:
I use that tool.  It is very nice because it allows you to monitor your pools via your existing NMS.

-----Original Message-----
From: dhcp-users [mailto:dhcp-users-bounces at lists.isc.org<mailto:dhcp-users-bounces at lists.isc.org>] On Behalf Of Chuck Anderson
Sent: Monday, December 04, 2017 7:33 AM
To: Users of ISC DHCP <dhcp-users at lists.isc.org<mailto:dhcp-users at lists.isc.org>>
Subject: Re: Graphing DHCP pools

There is:

https://github.com/ohitz/dhcpd-snmp

Then you can use your favorite SNMP graphing tool.

On Mon, Dec 04, 2017 at 08:52:51AM -0600, project722 wrote:
> Hey guys, I'm looking for a solution that can take the data from our
> dhcp server and use that to create charts and graphs of of our scopes.
> Currently we are using a homegrown bash script that uses the Google
> API for charts to do the graphing and create the charts. But, although
> its very nice looking it takes ALOT of re-working the script every
> time we add a pool or adjust a scope. I'm looking for another
> solution. One that can automatically detect and put up a new chart
> when we add scopes and one that could possibly retain historical data.
> I've thought about solarwinds but I'm not sure if it can plug into
> Linux like this or if it even has such a feature for dhcpd.
>
> Any suggestions?
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