How do you test your dhcpd setup?

Cathy Almond cathya at
Thu Oct 15 17:24:53 UTC 2015

Late to the party (and top-posting because everyone else has done on
this thread) - apologies x2

Have a look at perfdhcp - it's part of the ISC Kea project:

On 17/07/2015 19:22, Leandro wrote:
> It was a little hard for my to make it work.
> I could not compile it on 64bits. it worked on i386.
> Leandro.
> On 17/07/15 14:32, Frank Price wrote:
>> Thanks for the tip Leandro.  If I've got the right tool (from
>> Nominum), unfortunately it doesn't work for my OS (Centos 7) and I
>> can't find source.
>> -Frank
>> --
>> Frank Price | R & D Services |
>> <mailto:fprice at>fprice at | 859-232-2844 | RDS on
>> Innovate <>
>> On Fri, Jul 17, 2015 at 9:27 AM, Leandro <ingrogger at
>> <mailto:ingrogger at>> wrote:
>>     I know exactly how you feel.
>>     try dhcperf , its also a benchmark tool.
>>     Leandro.
>>     On 16/07/15 14:05, Frank Price wrote:
>>>     Greetings dhcp-users,
>>>     I've recently taken over a pair of ISC DHCP 4.2.5 servers, and
>>>     I'd like to know how you test your environment -- both for
>>>     troubleshooting and also for validating config changes.  To make
>>>     things concrete, let me briefly explain our setup and then what
>>>     I'd like to be able to do.
>>>     We have about 70 subnets defined, with failover peers on most of
>>>     them between our two servers.  Our network (cisco) vlan config
>>>     has ip helper-addresses which point to both servers.  Mostly we
>>>     do interim-style ddns, although there are some static host entries.  
>>>     Usually everything works fine, until it doesn't, and every few
>>>     months we add a new subnet for a lab or something.  To
>>>     troubleshoot, or double-check changes,  I'd like to be able to
>>>     simulate a lease request from a client.  Right now what I do is
>>>     a) run dhcpd -t against the changes, and then b) stand up a vm on
>>>     the new subnet and see what happens.  It would be much nicer to
>>>     simply say "pretend you get a request from this MAC on this
>>>     subnet, and show me what you'd do."
>>>     I've tried dhcping, and it seems to require me to run it from a
>>>     server already on the subnet in question -- not quite what I
>>>     want, but maybe I just don't understand it well.  
>>>     Thanks for any advice you can provide,
>>>     -Frank
>>>     --
>>>     Frank Price | R & D Services | Lexmark International

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