Date: Sun, 1 Dec 2002 21:35:06 +0100 From: Cliff Sarginson <cls@raggedclown.net> To: FreeBSD Questions <FreeBSD-questions@FreeBSD.ORG> Subject: Re: interpretation of arp output Message-ID: <20021201203506.GA1424@raggedclown.net> In-Reply-To: <20021129092555.GA64345@happy-idiot-talk.infracaninophi> References: <20021129054715.GA869@raggedclown.net> <20021129092555.GA64345@happy-idiot-talk.infracaninophi>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, Nov 29, 2002 at 09:25:55AM +0000, Matthew Seaman wrote: > On Fri, Nov 29, 2002 at 06:47:15AM +0100, Cliff Sarginson wrote: > > An arp -a gives the following line (amongst many happy bunnies) > > > > angelus.raggedclown.intra (192.168.1.50) at 00:a0:cc:d1:fb:88 on rl0 > > [ethernet] > > ? (192.168.1.255) at ff:ff:ff:ff:ff:ff on rl0 permanent [ethernet] > > That's quite normal. Some process is sending out packets to your > network broadcast address. You can investigate what with tcpdump: > > tcpdump -i rl0 ip broadcast > tcpdump -i rl0 ether broadcast > > > Can someone explain this to me .. the line with the "?" obviously. > > Whether it is relevant or not the line above represents a Windows > > XP system that does not get run very often (which means it may always > > be there, but I have never noticed it). > > No: the entries in the arp table are just ordered by IP number. > The machine 'angelus' just happens to be the next highest IP number > active on your network. > > The '?' just means that the system can't resolve that IP number into a > hostname. You can add entries for 192.168.1.255 to your /etc/hosts or > your DNS so that arp will have something to print out if you want. > Ok, thanks, I think it was the "?" that made me ask. Question marks make me nervous :) -- Regards Cliff Sarginson The Netherlands [ This mail has been checked as virus-free ] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20021201203506.GA1424>