InterVLAN router and Master Port Question

InterVLAN Routing between all VLANs done by CRS-125-24G

Desired configuration Example

Ports 9-15 VLAN 10 (untagged Access Ports for PCs)
Ports 16-18 VLAN 20 (untagged Accees Ports SERVER Infrastructure)
Ports 19-21 VLAN 30 (untagged Access Ports VXLAN Infrastructure)
Ports 22-24 TRUNK Port with vlan 10,20,30 (ESXi hosts would connect to these trunks)

VLAN 10 IP 192.168.10.1
VLAN 20 IP 192.168.20.1
VLAN 30 IP 192.168.30.1

I’ve seen the examples on the MikroTik Wiki http://wiki.mikrotik.com/wiki/Manual%3aCRS_examples#VLAN . I get how to associate VLANs to CPU etc. My main point of confusion is around the master-port. Looking at the intervlan routing on the WIKI they show a single master-port. The documentation says the following.

“A ‘master’ port will be the port through which the RouterOS will communicate to all ports in the group. Interfaces for which the ‘master’ port is specified become inactive - no traffic is received on them and no traffic can be sent out.”

So it sounds like you “burn” the master port as the link to the switch-cpu to do the routing. Would I just point all the ports listed above to a single master-port? Would this overwhelm the CPU/switch in chip? Or is there another way where I build a master port for each VLAN? If that is the case I don’t see how I achieve the InterVLAN routing.

Any suggestions and insight on this would be appreciated.