Slow DHCP Responses

Steven Carr sjcarr at
Wed Aug 7 21:16:06 UTC 2013

On 7 August 2013 22:09, Gruher, Joseph R <joseph.r.gruher at> wrote:
> My problem is DHCP requests take a very long time, generally around 30-40
> seconds.  This is consistent across different clients and across different
> sources of the DHCP request (Linux, Windows, BIOS PXE, iPXE).  They do
> always complete eventually but it seems like they should only take far, far
> less time.  I’m at a bit of a loss how to proceed on debugging the problem.
> Any suggestions to point me in the right direction?

Are you sure it's DHCP that's the issue? 30-40 seconds sounds like the
normal amount of time for your switchport to come up and negotiate
spanning tree if it isn't configured for (cisco-esque) portfast. What
does a simultaneous packet capture (on both the client and server)


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