vlan over multiple routerboards

hello,

i want to use a vlan over multiple routerboards. they are connected with wlan(wds) which each other. the network is bridged.

rb1 wlan <> rb2
rb2 wlan <> rb3

so i want use the vlan on rb2 with id 1000 and on rb3 with id 1000 too.

is that possible?

if i create a vlan with service tag on rb2 its correctly connect to rb1. but if i add the vlan on rb3 the connection on rb2 is lost to rb1…

i have used the service tags…

thank you max