Hi everybody! I’ve been watching videos of lawrence systems for a while now and would def. would to say a massive THANK YOU because of Tom I did a very informed decision about how to set up my home network. I’ve never had an issue before… but now I have
So a few days ago I upgraded a (basic) TP-Link semi-managed switch (as in: it did support VLAN’s) with a brand new Unifi US-8 switch powered over PoE for my AV needs: chromecast, receiver, bluray, IPTV box and some other stuff as well connect to this switch.
My topology is as follows:
- pfsense connected to ‘Main Switch’ (Unifi US-8-60W, firmware v220.127.116.1125) port 1
- ‘Main Switch’ port 6 (PoE) to ‘AV Switch’ (Unifi US-8, firmware v18.104.22.16825) port 1
- Clients connected to ‘AV Switch’ port 2 (VLAN_IPTV) ,3 (VLAN_IOT), 4 (VLAN_IOT), 5 (VLAN_IOT), 7 (VLAN_FILTERED)
So, my first problem began right away: some ports did not let pass through some DHCP traffic: specifically, port 5, 6 and 7 could not get an IP from my DHCP server . However, if I plugged those devices in port 2, 3 or 4, no problem at all. I did not test port 8.
However, when I started debugging that, it started working. I did not apply any change in the configuration except for enabling port 6 and 8 which I had disabled because nothing plugs in there.
A few hours later though I noticed I could not cast to the connected Chromecast, so I did take a look and surprise: that device had no link. I unplugged it, plugged it back in, nothing. I swapped ports 3 and 4 and now both links went up!
I could in fact cast some stuff but now, a few hours later I couldn’t use the Chromecast again, but this time it did have a link and was in fact connected to the network as it had an ip and I could see on screen the photos change + I could see the LED activity as well, I can even ping it without any issues as well. My best guess is that somehow UDP traffic is now being blocked by this switch?
Before all this, I never had any issue at all with the Chromecast (or the other equipment) so all these strange errors lead me to believe that maybe the switch is faulty or maybe there is a firmware issue? I did change cables but to no avail, strange errors keep appearing on this particular switch.
In the infinite wisdom of the internet, am I right to be suspicious of the switch or is there maybe something else I might have forgotten? I don’t think power is an issue, because the device consumes generally less than 5W and it is all decent quality cabling (also: cable from switch to switch is not longer than 4 [~157 inches] or 5 meters [~196 inches]).
It’s already a long story, but should you need more information about the setup and configuration, don’t hesitate to ask!
Greetings and thanks for taking the time to even read all this!
 I asked on the community forums of
UI.com but did not get any answers to my initial question: