[lwip-devel] [bug #27049] DHCP IP address assignment with multiple lwIP devices fails

[Bill Auerbach]

URL:
  <http://savannah.nongnu.org/bugs/?27049>

                 Summary: DHCP IP address assignment with multiple lwIP
devices fails
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: billauerbach
            Submitted on: Fri 17 Jul 2009 01:04:50 PM EDT
                Category: UDP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

Powering up multiple (3+) lwIP-based devices at the same time appears more
often than not to confuse DHCP on all of the devices.  When this occurs, none
of the devices complete DHCP and none receive an IP address.  By using
WireShark, I can see the devices come up about 10mS to 15mS apart.  The DHCP
exchanges are all present and appear OK, but they are intermingled which is
why I suspect they are confusing each other.

If I power up each device manually seconds apart they all come up fine.

[We need a category for DHCP :-) ]




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