Date: Sat, 20 Oct 2001 22:47:50 -0400 (EDT) From: Jim Weeks <jim@siteplus.net> To: Rowan Crowe <rowan@sensation.net.au> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: arplookup failed: Message-ID: <Pine.BSF.4.21.0110202244220.925-100000@veager.jwweeks.com> In-Reply-To: <Pine.BSF.4.21.0110211233190.36258-100000@velvet.sensation.net.au>
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A traceroute from my server back to the offending machine travels through my default gateway, which is how it should be, I think. Or shouldn't the trace also show the gateway for the offending machine? -- Jim Weeks On Sun, 21 Oct 2001, Rowan Crowe wrote: > On Sat, 20 Oct 2001, Jim Weeks wrote: > > > Would someone please check me on this. I know this has been discussed > > before and I want to make sure I understand correctly. > > > > I am receiving the following error, > > > > Oct 20 21:16:21 server /kernel: arplookup XXX.XXX.XXX.XXX failed: host is > > not on local network > > > > Indeed the server issuing the request is not on the same subnet. If I > > understand arp correctly, the kernel is not able to respond to a mac > > address not directly connected to the subnet of the responding machine. > > > > After looking at the results of "tcpdump -n -e -p arp", I see a lot of > > traffic from several subnets. Should I be seeing arp requests other than > > those initiated by my default gateway or other machines on the same > > subnet? > > Hi Jim, > > I had this problem when REPLY packets from a host on a different subnet, > but same physical wire, were arriving directly back at my box, rather than > via the gateway for its own subnet. Presumably the remote host thought it > could be smart by bypassing the gateway. See where a traceroute from the > other server goes? > > Cheers. > > > -- > Rowan Crowe > camrecord.com / camdiscover.com / Sensation Internet Services > Melbourne, Australia > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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