Problem receiving UDP broadcast packets.

Wed Apr 20 10:23:55 EDT 2011

On 2011年04月20日, Roy Smith <roy at panix.com> wrote:
> In article <iol875$ah2$3 at reader1.panix.com>,
> Grant Edwards <invalid at invalid.invalid> wrote:
>>> I'm trying to implement a device discovery/configuration protocol that
>> uses UDP broadcast packets to discover specific types of devices on
>> the local Ethernet segment. The management program broadcasts a
>> discovery command to a particular UDP port. All devices who get that
>> packet are expected to answer regardless of thier current IP address.
>> Have you considered what will happen if you have, say, 1000 such 
> devices, and they all respond at the same time?

Yes. Firstly, there will very rarely be more than a handful of such
devices. Secondly, I plan on inserting a small, psuedo-random delay
before replying. Thirdly, the management program typically repeats
the discovery process a few times in case any packets get dropped.
-- 
Grant Edwards grant.b.edwards Yow! Maybe we could paint
 at GOLDIE HAWN a rich PRUSSIAN
 gmail.com BLUE --