On Thu, 2018-03-22 at 11:15 +0100, [email protected] wrote: > On Thu, Mar 22, 2018 at 09:46:02AM +0000, Thomas Pircher wrote: > > On Thu, 22 Mar 2018, David wrote: > > > Does Debian keep a table of MAC addresses? If so where can I locate it? > > > > The kernel does. You can get the ARP table e.g. with > > > > ip neigh list > > There's also the arp (8) command: you can query and manipulate > the ARP table (arp stands for "address resolution protocol", which > is tasked with keeping this MAC -- IP mapping up to date). > > For example, just typing "sudo arp" will show you a list of known > IP Address to MAC address mappings. With "arp -s <ip> <mac>" you > can set one such mappings. And so on. > > Cheers > -- tomás Thank you to Thomas and Tomas for replying.
I think as Thomas stated it's a router problem, I've been looking at what the various routers are storing and not found a problem to date. I suspect that allocating random MAC addresses is the problem and I need to find out what I can allocate without causing problems. There must be some rules somewhere, I suspect the Arduino uses a block of addresses and I've duplicated something. David.
