The re1 (internal INT) MAC is 00:22:4d:d1:48:d5, which identifies itself as a MITAC International Corp MAC and matches up with the motherboard vendor.
Using 'Arp -a", I have yet to locate the 20:c0:47... MAC on any of my machines, Its non-existent as far as I am concerned, and yet I literally have hundreds of the "duplicate IP address" messages in /var/log/messages. Arp -a' (on the router) does show a Verizon MAC, but its a different MAC than shown below... Jay > What do you have in your arp -a result for that 192.168.1.1 IP? > > Does it look like a Verizon device? > > If not, itâs probably the âproblemâ. > > (I believe Verizon FIOS wants to live on that IP and wants to use DHCP to > issue addresses to the things itâs talking to.) > > â > Raul > > On Friday, September 7, 2018, Jay Hart <jh...@kevla.org> wrote: > >> I'm now running my new router. Internal network is 192.168 based. I have >> two interfaces on my >> router, one external, one internal. Motherboard is a MITAC PDP11BICC >> using Realtek NICs. >> >> I'm seeing a lot of messages in the log file regarding duplicate IP >> Addresses, specifically I'm >> seeing: >> >> /bsd: duplicate IP address 192.168.1.1 sent from ethernet 20:c0:47:dc:27:dd >> >> This translates to a Verizon MAC. My FIOS ONT is definitely Verizon. What >> I struggling with is >> what exactly is causing this message, and how to stop/resolve it. >> >> When I run 'Arp -a' either internally from another box, or on the router >> itself, I'm not seeing >> this MAC. >> >> Hoping the list can provide some additional troubleshooting ideas. Can >> this be some sort of spoof >> attempt??? >> >> Thanks, >> >> Jay >> >> >
