I am trying to set up a management VLAN across 2 RB750s and I have some questions. I am assigning this VLAN 85 but now my problem is how to apply this VLAN to a physical port on the router? Then how would you trunk these VLANS between the two routers? I read the wiki but it didn't really help me to figure this out. Could someone help me out with this concept?

Add the VLAN interfaces on both routers, and make the parent interface the physical interface the routers will be connected via.

I am going to use port 1 on the RB750 to connect the routers and that will help with the trunking. How would I connect port 2 on the first RB750 to a PC and assign it to the VLAN? Anybody else have any thoughts about it?

Just configure the vlan in the ether1 on both routers, and add a bridge and put the vlan85 and the ether2 (PC) in the bridge.

interface vlan add name vlan85 vlan-id=85 interface=ether1 disable=no

add bridge name=bridge85


(Trunking vlans-interface)
interface bridge port add bridge=bridge85 interface=vlan85
interface bridge port add bridge=bridge85 interface=ether2

Que mucho aprendiste....

Thank you very much for helping out.....Now I will give it a try.