[96322] in RedHat Linux List
Re: PING Program
daemon@ATHENA.MIT.EDU (Tim Hockin)
Mon Oct 26 12:17:30 1998
From: Tim Hockin <thockin@isunix.it.ilstu.edu>
To: redhat-list@redhat.com
Date: Mon, 26 Oct 1998 11:13:09 -0600 (CST)
In-Reply-To: <363492E1.253D9FF1@wesleyan.edu> from "Cimarron Ryan" at Oct 26, 98 10:18:57 am
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
> Pretty spiffy. I've noticed that on my LAN xxx.xxx.xxx.1 and xxx.xxx.xxx.255
> always respond if there are any machines at all on the subnet. The .255
> response makes sense to me, but is the .1 response also a universal factoid?
not at all. .1 should only respond if something has that IP - perhaps a
router? .0 and .255 (for a 255.255.255.0 class C) should always show as
up, with undefined or unpredictable responses. .0 is your "network"
number, and .255 is your "broadcast" number. You should be able to hit
.255 and have all machines answer. I have had mixed results with that. I
am guessing it would be some OS's IP stack that causes undefined results.
In a perfect world, just pinging .255 would get a respomse from all active
IP devices.. At least in MY perfect world..:)
Tim
--
PLEASE read the Red Hat FAQ, Tips, Errata and the MAILING LIST ARCHIVES!
http://www.redhat.com http://archive.redhat.com
To unsubscribe: mail redhat-list-request@redhat.com with
"unsubscribe" as the Subject.
