Constant DHCP requests...

[Jason Gerfen]

It sounds like a broadcast storm. Any logging from the router or even
the dhcp server? Maybe a client is broadcasting? Try disconnecting
each port on the router to find the culprit?

On Mon, Aug 1, 2011 at 7:36 PM, Frank Bulk <frnkblk at iname.com> wrote:
> What device is this?  We continue to see issues with Belkin routers in our
> SP network.  A firmware upgrade usually resolves the issue.
>
> Frank
>
> -----Original Message-----
> From: dhcp-users-bounces+frnkblk=iname.com at lists.isc.org
> [mailto:dhcp-users-bounces+frnkblk=iname.com at lists.isc.org] On Behalf Of
> Jeff Justice
> Sent: Sunday, July 31, 2011 7:52 AM
> To: Users of ISC DHCP
> Subject: Constant DHCP requests...
>
> I know this list is for the ISC DHCP, but I am having a DHCP problem that I
> was hoping someone could shed some light on.
>
> I have a device that hooks to our network that gets its address via DHCP.
> When it is first powered on, it sits there for anywhere from 5 to 20 minutes
> without a problem, but then the network light starts flashing constantly.
>
> I ran a Wireshark trace and discovered that I was getting a constant stream
> of DHCP Requests from the device followed by the router sending an ACK.
>
> What led me to ISC's DHCP was that I thought I would install it on a server
> on our network, turn off our router's DHCP to see if the problem changed.
> It didn't.  I am still getting flooded with the DHCP request/ack.
>
> I have had a conversation with the device manufacturer who says they can't
> find any problems with their device.  They sent me a replacement which has
> the same problem.
>
> This leads me to believe that there is something in the programming of the
> device that isn't handling the DHCP server's response correctly, or there is
> a problem with my network or maybe even a switch?
>
> I'm not sure what steps to take at this point to solve this.  I can't put
> the device in production until I have figured out the cause.
>
> Any ideas?
>
> Jeff
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-- 
Jas