Date: Wed, 21 Jun 2000 20:58:33 -0700 (PDT) From: The Clark Family <res03db2@gte.net> To: "Richard P. Kernin" <rpk@niagara.edu> Cc: "'freebsd-questions@FreeBSD.ORG'" <freebsd-questions@FreeBSD.ORG> Subject: Re: Network Interface Grabbing Random IP Addresses Message-ID: <Pine.BSF.4.21.0006212058010.46532-100000@orthanc.dsl.gtei.net> In-Reply-To: <0D274047A242D2119B1D006008C19DD67B85A6@POBOX>
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Is the ip address on xl0 being assigned via the dhcp-client? [RC] On Tue, 20 Jun 2000, Richard P. Kernin wrote: > Hi, > > We've been experiencing some strange behavior on one of > our FreeBSD boxes for the last few months. Originally > the system was running v2.2.x with an Intel EtherExpress > NIC (fxp0), but when we started experiencing problems we > upgraded to the current revision of the time v3.4 and > upgraded the hardware moving to a 3Com XL NIC (xl0) to > be consistent with what we are using in other areas. > What is happening is that the system appears to be grabbing > random IP addresses, aliases, in addition to it's statically > assigned IP address, then dropping them after a time. The > arp tables reflect the aliases, and quickly fill up, all > for the same MAC address. > > ? (xxx.xx.xxx.24) at 0:50:4:3:xx:xx permanent [ethernet] > ? (xxx.xx.xxx.76) at 0:50:4:3:xx:xx permanent [ethernet] > ? (xxx.xx.xxx.80) at 0:50:4:3:xx:xx permanent [ethernet] > ? (xxx.xx.xxx.89) at 0:50:4:3:xx:xx permanent [ethernet] > ? (xxx.xx.xxx.94) at 0:50:4:3:xx:xx permanent [ethernet] > [etc] > > xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet xxx.xx.xxx.3 netmask 0xffffff00 broadcast xxx.xx.xxx.255 > inet xxx.xx.xxx.214 netmask 0xffffffff broadcast xxx.xx.xxx.214 > ether 00:50:04:03:xx:xx > media: 100baseTX <full-duplex> > supported media: autoselect 100baseTX <full-duplex> 100baseTX > <half-dupl > ex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP <half-duplex> > 10baseT/UTP > > The subnet that this machine is on has it's IP addresses assigned > via DHCP, except for a block set aside for static assignment > (of which this server is statically assigned). We are using > ISC DHCP server running on FreeBSD, on another server v3.4 that > is functioning properly. As a result of this machine grabbing > random IP addresses/aliases it eventually "bumps" into workstations > that are legitimately assigned the IP addresses (not a good thing). > I've upgraded the operating system, replaced the hardware, used > the generic kernel, as well as the compiled kernel we use specifically > for that system, all to no avail. We've successfully used FreeBSD > (and the originally 386BSD! ;-) for 5+ years without problems, so > this is the first time we've been stumped. The machine is running > the Apache webserver, but is not doing any virtual hosting, and we > don't do IP aliasing on any of our systems (am familar with how to > do this, as we did it years ago on now defunct systems for a project). > > Any suggestions or insight into what might be causing this behavior > is greatly appreciated. > > Thank you. > > -rpk > > ---------- > Richard P. Kernin > Assistant Director, Information Technology > Niagara University, NY 14109-2019 > Internet: rpk@niagara.edu > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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