Failed to ping from linux bridge's gw ip

I failed to set up a molti node env with linux bridge plugin. So I want to have a simulation first.

First I did a test between two hosts:
host a:
ip link add link eth0 name eth0.1000 type vlan id 1000
ip link set eth0.1000 up
ip addr add 4.4.4.1/24 dev eth0.1000
host b:
ip link add link eth0 name eth0.1000 type vlan id 1000
ip link set eth0.1000 up
ip addr add 4.4.4.2/24 dev eth0.1000

This way I can ping each other from both hosts

Then I add in linux bridge on one host:
host b:
ip link add link eth0 name eth0.1000 type vlan id 1000
ip link set eth0.1000 up
brctl addbr br200
brctl setfd br200 0
brctl stp br200 off
ip link set br200 up
brctl addif br200 eth0.1000

ip tuntap add gw200 mode tap
ip link set gw200 up
brctl addif br200 gw200
ip addr add 4.4.4.2/24 dev gw200

but I cannot ping from each other.

Who can help with this?

Thanks