Excellent, thanks for the clarification and detail! Now that I think about it, as long as the PoE output negative is tied to the input power negative (and I find a +48V PSU rather than -48V one) then I don't think I'll run into any issues in my situation as everything is ultimately run off the same ...

Hi all, Does anyone know whether the PoE output on the RB5009UPr+S+IN is galvanically isolated? I believe this is optional in the PoE specs, but I've run into issues before when it's not isolated. I had a TP-Link PoE switch years ago that ran off a -48VDC power supply, and it connected the -48V rail...

Thanks for your reply! I agree 802.3ad is not supposed to duplicate packets which is why I am confused. I used Wireshark on the host and when I listen to each interface on its own I get packets coming in on both interfaces (even though I should only see them on one interface) and when I listen to th...

I have noticed that in SwOS (2.13) on a CRS-309 if you enable IGMP Snooping it seems to break multicast streams. With IGMP snooping active, starting a new multicast stream works fine. Traffic is delivered and the multicast group appears on the IGMP tab. But if you reboot the switch while the stream ...

Does anyone know why multicast packets would arrive twice over a bonded interface with two connections? I have bonded together two ports on a CRS-309 via 802.3ad and enabled IGMP snooping on the bridge interface. There is no routing involved as although the CRS-309 is a 10G router, it can't route at...

Thanks for the reply! It does seem to provide a small speed increase going from balance-rr to balance-xor, crawling up from 0.9G to 3.9G, but that's still far from the 10G speed of a single link, let alone the 20G available. It also ultimately won't solve my issue as my understanding is that balance...

Hi all, I just purchased my first Mikrotik device - a CRS309-1G-8S+IN - and after a bit of a rocky start (had to RMA the device due to the PoE input dying on the second use) I finally have the replacement unit up and running. Unfortunately, despite it being connected to my servers at 2x 10G links ea...

Apologies for the delay responding. The vendor got back to me and asked me to return the item, which they tested and confirmed it was faulty. They shipped me a replacement CRS309 which arrived today. So far PoE has been working fine now. I tried the "/system health gauges print" command on...

Thanks for the suggestion. I don't have access to another 802.3at/af source at present but I tried with a passive injector connect to the Mikrotik's original AC adapter and that powered up the unit via the PoE port. So it looks like it's the 802.at/af negotiation that's stopped working? The PoE sour...

Hi all, I'm new to Microtik devices and my first one arrived today - CRS309-1G-8S+IN. I connected a PoE port on a Cisco switch to the Mikrotik's "POE/BOOT" socket, and the switch powered up, made a few odd clicking and beeping noises, and seemed to operate fine. I unplugged the PoE cable b...