Though obvious in retrospect, how to bring up a "master" interface through /etc/rc.conf without an IP address assigned was not easy to find.
The application is when all traffic through the interface is to be VLAN-tagged.
Will not only create re0 and re0.100, but also bring up re0. Otherwise, even though re0.100 is up, no traffic flows.
The application is when all traffic through the interface is to be VLAN-tagged.
Code:
ifconfig_re0="up" # Otherwise re0.NNN are not created
vlans_re0="100"
ifconfig_re0_100="inet 192.0.2.2/24"
Will not only create re0 and re0.100, but also bring up re0. Otherwise, even though re0.100 is up, no traffic flows.