vether vs. tap, initialization order, etc

[nia <nia%NetBSD.org@localhost>]

I just updated our home router from 9.1 to -current because a
roommate wanted to use wg(4).

I use tap as a bridge endpoint for two NICs that are used for
the LAN.

I thought I'd be able to copy the configs and do a straightforward
subtitution from tap to vether but this doesn't work.
/etc/rc.d/network fails to "up" the bridge on boot.

The bridge was previously initialized in /etc/ifconfig.tap0,
like so, now /etc/ifconfig.vether0:

create
inet 10.0.1.1 netmask 255.255.255.0
!brconfig bridge0 add $int add re1 add re2 up

I wonder if there's an initialization order difference
somewhere.