Performance Monitoring on dhcpd

Matt Causey matt.causey at
Sun Apr 25 00:55:35 UTC 2010

Cool.  Yeah these are both useful tools - but I'm after something a
bit more esoteric.

Say we have lots of REQUEST/ACK transactions:

Apr 25 00:05:49 fc-login-ind1-101 dhcpd: DHCPREQUEST for
from 00:15:70:89:0d:db via
Apr 25 00:05:49 fc-login-ind1-101 dhcpd: DHCPACK on to
00:15:70:89:0d:db via

 We can see that this one happened in the same second.  Is there some
way, perhaps with some of the custom dhcp logging foo, to log the
transaction as a single 'event' - with the time delta described in
milliseconds or microseconds?

If this functionality doesn't exist in the custom logging stuff today
- I'd love to add it if anyone else thinks it would be handy.


On Sat, Apr 24, 2010 at 1:49 PM, lastsky lastsky <lastsky at> wrote:
> hi,
> this is not what you want, but useful too, see
>> Date: Fri, 23 Apr 2010 20:54:18 -0700
>> Subject: Performance Monitoring on dhcpd
>> From: matt.causey at
>> To: dhcp-users at
>> Hi,
>> I'm looking at our dhcpd infrastructure, and would like to instrument
>> some monitoring.  I'd like to collect some latency metrics for dhcp
>> transactions.  Like, how long are REQUEST/ACK transactions taking?
>> What about REQ/OFFER/ACK transactions?
>> I'm thinking I can parse dhcp logs to get this data.  But is there a
>> better way?  How do the developers benchmark the performance of the
>> server during normal runtime?
>> --
>> Matt
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