[wplug] IP addresses

[Ed Aiken]

> Why does that work?  I was under the impression that you should ping the
> broadcast address.  Can you explain what happens when you ping the
> network?  I'd appreciate it...

pinging the network or broadcast on a data link would reveal any hosts
cabable of responding to icmp requests or echo zero broadcasts.

Both use same packet structure as well as icmp type / code pairing (type 8
for request; type 0 for reply and code 0 for both).

the data link dest addr in both cases are equal to ffffffffffff
(broadcast/all nodes); dest ip in either case reaches every host in most
circumstances.


.ed


> > On Wed, Sep 19, 2001 at 10:27:41AM -0500, Douglas Green wrote:
> > > Hi-
> > > Is there a way to determine what IP numbers on my network are used, and which
> > > ones are available? There are a large number of us on the same subnetwork,
> > > and over the years IP numbers have been lost/swapped/replaced, etc. I don't
> > > need to know who has what IP- only which ones are free. Any help is
> > > appreciated!
>
>