On Sun, Jan 01, 2023 at 11:31:38AM -0800, pe...@easthope.ca wrote: > Greetings for the New Year to Debian users, > > Verifying and updating instructions here. > https://en.wikibooks.org/wiki/Oberon/ETH_Oberon/QEMUinstall#Network_Connection_on_a_Virtual_Machine > Questions (1) and (2) follow. > > root@joule:/home/root# ip link show br0 > 4: br0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN > mo > de DEFAULT group default qlen 1000 > link/ether 92:e0:54:07:2a:e2 brd ff:ff:ff:ff:ff:ff > > br0 is a virtual interface; not connected to hardware. > (1) How is address 92:e0:54:07:2a:e2 derived?
It's first quad is 9, binary 0110. The second bit is set: this tells you that it is a locally administered address [1] Typically it's the VM hypervisor who's in charge of generating one (ideally in a way that it doesn't collide with others). For example, qemu-xxx have a command line parameter `mac' for that. Cheers [1] https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local_(U/L_bit) -- t
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