I really like Ed Harmoush’s vlan explanations at his Practical Networking site. In Virtual Local Area Networks (VLANs) he covers vlans with good animations. Included is an example of the way a router on a stick works, essentially it is a router with a single physical port configured as a trunk port and connected to a vlan-aware switch. If you look at the block diagram of the hAP ac², you will see internally that’s what it is. There is a 2Gbps “trunk” between the CPU “routing engine” and the switch ASIC.
Ed has another video where inter-vlan routing is explained in greater detail and it has example cisco switch configurations. Every vendor has their own way to configure vlans, so being exposed to the different ways it is done is useful if you are going to interfacing with other vendors’ kit.
After digesting those explanations, then the RouterOS bridge mysteries explained article may make more sense.
Head over to Ed Harmoush’s Practical Networking site https://www.practicalnetworking.net Ed has recently started a Networking Fundamentals course and he is putting the first module (with multiple videos) on Youtube. It’s a good intro with very little assumptions about previous knowledge, and even if you think you already know this stuff, if you watch it, and give it your utmost attention, you will probably get a deeper understanding than you currently have. Ed has some of the best explained info about vlans Virtual Local Area Networks (VLANs) See the challenge quiz if you think you understand vlans. Ed also has a video covering the same info VLANs – the simplest explanation Here’s an index to the vlan pages on PracticalNetworking And here’s a good starting point for Networking topics in general (don’t be put off by the CCNA, this is pretty generic info that you need to know, and explained in an easy to understand way. CCNA Index You can ignore the ACL stuff which is Cisco specific.