Re: Port 67 UDP Problem

From: SysAdm (wjones@sitesmith.com)
Date: 12/05/02 

From: "SysAdm" <wjones@sitesmith.com>
Date: Thu, 5 Dec 2002 19:22:43 +0000 (UTC)

<SNIP>
"NeoSadist" <neos@dist> incorrectly wrote in message
news:uuth3s3qd86ta5@corp.supernews.com...
> Port 67 is bootps, which is a standard loop-back type connection and/or
> router and/or lan manager log-in announcement.

wrong. its not any type of loop-back connection/router/lan manager login
announcement. its just a service which provides network configuration and
ip assignment to clients within its configured range.

>I think it just lets all
> nodes that are listening know that its node is now online. I think this
is
> starting to dig into the physical level of the network: how to detect that
> cables are connected, etc.

WTF? No. It doesnt care who is online - it has no interest. Its just
there to service requests from hosts who have been configured to receive
addressing automagically. BOOTPS/DHCP has nothing whatsoever to do with the
physical "level" of the network. Nada. Nilch. Go back and relearn the OSI
model. Do not pass go.

>I've seen similar things working on aircraft:
> some sort of signal or detection method for determining that the cable
> works, and that the node is connected.

Again, you're getting your OSI placement all wrong. Sure, there are
mechanisms within Layer 1 & 2 protocols to do things like carrier detection
(eg. CSMA/CD for ethernet), but that isnt related to this post at all.

Now, dont take this as a personal affront to your manhood. Just consider
the context in which you post replies to people who genuinely need help,
when you dont actually know the correct answer.
If I didn't know the answer, after reading your post, I would believe that
bootps/dhcp had something to do with the physical layer of the network and
was a "standard loop-back connection".

SysAdm

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