9/20/2023 0 Comments Linux get original mac address![]() ![]() ![]() each time a bridge port is added or removed the bridge interface dynamically inherits the lowest MAC address among all its bridge ports' MAC addresses.once at least one interface has ever been enslaved as bridge port:.until the first time an interface is set as bridge port, when administratively UP it gets a LOWER_UP flag and its operstate is UNKNOWN, which gives it the benefit of the doubt as if UP (eg with systl -w 0.ignore_routes_with_linkdown=1, route is working and doesn't have the linkdown property).it initially gets an autogenerated random MAC address with private bit set (ie: 2nd digit in MAC address' first byte is always 2,6,a or e).If the bridge has not be manually given a MAC address then Behavior might possibly have changed in the past depending on kernel version, but currently (here: kernel 5.17.x) it appears that: ![]()
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