Sounds like you have a host with a NIC that's configured for DHCP but either can't communicate with the DHCP server, or there are no free IPs for the DHCP server to give it. On Wed, Oct 28, 2015 at 10:12 AM, Jason Warr <jason at warr.net> wrote:> It's a Zero Config IP address. Most likely a host with zero config > enabled, pretty much all Windows by default, was unable to get an IP from > DHCP. > > On 10/28/2015 9:04 AM, Timothy Murphy wrote: > >> Why does "arp -a" show IP address 169.254.192.123 >> on my 192.168.2.0 home network? >> I recall seeing this IP address somewhere, >> but don't remember where. >> >> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >-- Mark Haney ::: Senior Systems Engineer *VIF* International Education P.O. Box 3566 ::: Chapel Hill, N.C. 27515 ::: USA 919-265-5006 office Global learning for all. www.vifprogram.com <http://www.vifprogram.com/?utm_source=signature&utm_medium=email&utm_campaign=VIF> Find VIF on Facebook <http://facebook.com/VIFInternationalEducation> | Twitter <http://twitter.com/vifprogram> | LinkedIn <http://www.linkedin.com/company/vif-international-education> Recognized as a ?Best for the World? <http://bestfortheworld.bcorporation.net/> B Corp!
Mark Haney wrote:>> On 10/28/2015 9:04 AM, Timothy Murphy wrote: >> >>> Why does "arp -a" show IP address 169.254.192.123 >>> on my 192.168.2.0 home network?> Sounds like you have a host with a NIC that's configured for DHCP but > either can't communicate with the DHCP server, or there are no free IPs > for the DHCP server to give it. >> On 10/28/2015 9:04 AM, Timothy Murphy wrote:Thanks for your response. I should have said I'm running CentOS-7.1 on my home server. Also the actual "arp -a" entry on the server is (169.254.192.123) at 30:10:b3:2e:cb:ff I see that 30:10:b3 is assigned to Lite-On (or Liteon) which is a Taiwan company, who sell network cards among other things. And I find when I google to "liteon wifi network" that there are many queries (and complaints) about mysterious links involving liteon devices. So I guess the strange IP address probably comes from some Lite-On device somewhere in my house - maybe on the server itself, an HP MicroServer. There are so many possible electronic culprits today. -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin
On 10/28/2015 2:59 PM, Timothy Murphy wrote:> So I guess the strange IP address probably comes from some Lite-On device > somewhere in my house - maybe on the server itself, an HP MicroServer.My HP Microserver N40L (the original version), the NIC is Broadcom, 02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5723 Gigabit Ethernet PCIe (rev 10) and its MAC is A0:B3:CC:xx:xx:xx -- john r pierce, recycling bits in santa cruz
On 10/28/2015 04:59 PM, Timothy Murphy wrote:> Mark Haney wrote: > >>> On 10/28/2015 9:04 AM, Timothy Murphy wrote: >>> >>>> Why does "arp -a" show IP address 169.254.192.123 >>>> on my 192.168.2.0 home network? > >> Sounds like you have a host with a NIC that's configured for DHCP but >> either can't communicate with the DHCP server, or there are no free IPs >> for the DHCP server to give it. >>> On 10/28/2015 9:04 AM, Timothy Murphy wrote: > > Thanks for your response. > I should have said I'm running CentOS-7.1 on my home server. > Also the actual "arp -a" entry on the server is > (169.254.192.123) at 30:10:b3:2e:cb:ff > > I see that 30:10:b3 is assigned to Lite-On (or Liteon) > which is a Taiwan company, who sell network cards among other things. > And I find when I google to "liteon wifi network" > that there are many queries (and complaints) about mysterious links > involving liteon devices. > > So I guess the strange IP address probably comes from some Lite-On device > somewhere in my house - maybe on the server itself, an HP MicroServer. > There are so many possible electronic culprits today.You should be able to use nmap to scan the device. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20151029/8eb37138/attachment-0001.sig>