[NTLUG:Discuss] DHCPD Chatter

[Keller Giacomarro]

Chris,

Thanks for the reply.  Soon I'll find some sort of Linux that maybe
you're NOT familiar with. =)

I didn't know that renews are requested half way through the lease time.
That explains why I'm getting these messages so often.  According to
'ifup', my renewal time is about 275 seconds or so.  Looks like I need
to adjust how long leases last.

Also, the BOOTP messages are from the Cisco switch asking for an IP.  I
haven't setup any BOOTP ranges, so those don't surprise me.

Thanks again for your help.

-Keller

On Thu, 2007-06-07 at 21:25 -0500, Chris Cox wrote:

> Keller Giacomarro wrote:
> > I may be new to the list, but I have plenty of questions.  Thanks in
> > advance for the help!
> > 
> > I'm running a DHCPD server on Ubuntu Server at home that passes out
> > addresses in the 10.2.0.100-10.2.0.254 range.  The server appears to be
> > working fine, but I get this in syslog...
> 
> Nothing seems wrong (suspicious).  Maybe the client is requesting a
> shorter
> than average lease time.  Renewal attempts happen at the half
> way point of lease time.  So if you have 10 min. leases, you
> can expect to see a renewal every 5 minutes.
> 
> We use short leases where I work (30 min I think) because it helps
> maintain the health of the network... esp. true of floating devices
> when dynamic dns is used.
> 
> The BOOTP from dynamic client and no dynamic leases seems to
> point to a configuration problem.  Can you post your dhcpd.conf
> file?
> 
> It may reveal what the problem actually is.
> 
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