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How to make my macos bridge0 active?

In my case:
on my macOS I running a minikube docker VM, and it host a docker bridge network.
check the b7cc12043647.

$ docker network ls
NETWORK ID     NAME       DRIVER    SCOPE
ada0c5109376   bridge     bridge    local
89afa32d0810   host       host      local
b7cc12043647   minikube   bridge    local
4f7dca22f5b6   none       null      local

I know docker bridge type network are attached to bridge0,

but my bridge0 is inactive.

bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
	ether 82:13:08:b0:ec:c0 
	Configuration:
		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
		root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
		ipfilter disabled flags 0x0
	member: en1 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 5 priority 0 path cost 0
	member: en2 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 6 priority 0 path cost 0
	nd6 options=201<PERFORMNUD,DAD>
	media: <unknown type>
	status: inactive

why? how to active it?