Hi, If IFLA_ADDRESS is set when creating a bridge over netlink, e.g. # ip link add test-bridge address b6:83:a2:b3:2f:0e type bride the bridge id is not set: # brctl show bridge name bridge id STP enabled interfaces bridge1 8000.000000000000 no It looks like this is caused by br_stp_set_bridge_id never beeing called. There appear to be many ways to solve this, but not sure what is the preferred route... Cheers, Tom