• 0 Posts
  • 24 Comments
Joined 1 year ago
cake
Cake day: June 14th, 2023

help-circle


  • So if I understand this right you will need to change the network on the port attached to the synology in your UniFi configuration or set the vlan tag in the synology OS, I would do the former. It sounds like you just added a second network/vlan to the existing interface which means you actually created a trunk and are getting the old network untagged and the new network with vlan tags which the synology is dropping. Synology OS also doesn’t really support trunked ports through the UI (even though it does support a port that only uses a vlan tag) so it’s much easier to just leave them untagged.




  • Well 5ghz requires more power, has less range, and needs its own antenna so for microcontrollers this makes it pretty pointless for devices that need range and low bandwidth for sending sensor updates, especially those that are battery powered. 5ghz can also have its own issues in cities if you have a lot of use of the DFS bands as well as being worse at traversing reinforced concrete.

    Also, a 2.4ghz radio can also sometimes support other things like zigbee, BT, and BLE which can be used for other functions.

    For what it’s worth, I have probably 50 WiFi devices and the majority of them are 2.4ghz sensors or switches and other low bandwidth tasks and I don’t have any issues, even when living in an apartment complex. If you are having issues you might need different hardware or more access points or something.

    Anyway, all that to say that 2.4ghz definitely still has a lot of utility today.




  • Yeah I’m with you, I read most of it but I just don’t know where the disdain comes from. At most scales of infrastructure anymore you can use them interchangeably because the difference is immaterial in practical applications.

    Like if I am going to provision 2TB I don’t really care if it’s 2000 or 2048GB, I’ll be resizing it when it gets to 1800 either way, and if I needed to actually store 2TB I would create a 3TB volume, storage is cheap and my time calculating the difference is not.

    Wait until you learn about how different fields use different precision levels of pi.









  • bigredgiraffe@lemmy.worldtoSelfhosted@lemmy.worldWeird 10Gbe networking problems
    link
    fedilink
    English
    arrow-up
    1
    arrow-down
    1
    ·
    edit-2
    7 months ago

    So then it doesn’t work across the ubiquity switch just to double check? If so, you will need to enable jumbo frames on that for sure and it is not enabled by default and that could also explain the throughput as it is having to fragment then defragment the frames to cross the switch or iperf is using MSS to determine that it can only send 1500 byte frames, your slower speed is about line rate for 1500 byte frames no matter the speed of the actual link.

    ETA: you can verify this by pinging with a large size and setting the “do not fragment” flag, so something like ‘ping -s 2000 -M do ip.addr ’ on Linux, windows uses different flags.




  • I would get one 2x32 kit somewhere you can return it (or even 1x32 if you are worried) and try it out, sometimes it does work but sometimes it won’t POST. Like the other person said, it might work but there really isn’t a way to know for sure other than that. I have run into situations with systems like that where that was just the largest available at release date for them to test and validate and larger DIMMs work fine so it’s probably worth testing in my opinion.

    I am curious myself, let me know if you do test it, those look like cool machines for small clusters.