Type topology hit enter, prompt changes to topo then type the following:
create "esa0" physical 600 port esa0 untag 10.26.6.51/24
This creates esa0 as a physical port,assigns it to vlan 600, untagged, using port esa0 with IP of whatever mask you specify.
You can use the command SHOW to see what is configured at any time. Make sure to do enable “mgmt.” so you can https: to this new IP from the LAN
In order to enable AP registration if the port you’re creating is the one you want APs to register to.
To do that, from the topology prompt, type “l3” and hit enter. At the l3 prompt:
set ap-register enable
set mgmt enable