Thanks to Fedora dropping the 32-bit x86 (i686) in F27, I had no choice but to upgrade the home router. I used this opportunity to get rid of VLANs and return to a conventional setup with 4 Eithernet ports. The main reason is, VLANs were not entirely stable in Fedora. Yes, they mostly worked, but I could never be sure that they would continue to work. Also, mostly in this context means, for example, that some time around F24 the boot-up process started hanging on the "Starting the LSB Networking" job for about a minute. It never was worth the trouble raising any bugs or tickets with upstreams, I never was able to resolve a single one of them. Not in Zebra, not in radvd, not in NetworkManager. Besides, if something is broken, I need a solution right now, not when developers turn it around. I suppose VLANs could be allright if I stuck to initscripts, but I needed NetworkManager to interact properly with the upstream ISP at some point. So, whatever. Fedora costed me $150 for the router and killed my VLAN setup.
I looked at ARM routers, but there was nothing. Or, nothing affordable that was SBSA and RHEL compatible. Sorry, ARM, you're still immature. Give me a call when you grow up.
Buying from Chinese was a mostly typical experience. They try to do good, but... Look at the questions about the console pinout at Amazon. The official answer is, "Hello,the pinouts is 232." Yes, really. When I tried to contact them by e-mail, they sent me a bunch of pictures that included pinouts for Ethernet RJ-45, pinout for motherboard header, and a photograph of a Cisco console cable. No, they don't use Cisco pinout. Instead, they use DB9 pin numbers on RJ-45 (obviously, pin 9 is not connected). It was easy to figure out using a multimeter, but I thought I'd ask properly first. The result was very stereotypical.
P.S. The bright green light is blink(1), a Christmas present from my daughter. I'm not yet using it to its full potential. The problem is, if it only shows a static light, it cannot indicate if the router hangs or fails to boot. It needs some kind of daemon job that constantly changes it.
P.P.S. The SG200 is probably going into the On-Q closet, where it may actually come useful.
P.P.P.S. There's a PoE injector under the white cable loop somewhere. It powers a standalone Cisco AP, a 1040 model.