• 0 Posts
  • 47 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.










  • 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.





  • I have run into this issue a lot, I have always found that most of the tutorials set things up in isolation and never talk about integration points or how to build a whole solution.

    On the MetalLB configmap point, that’s another issue I have run into. In the earlier days of metallb it was configured differently and the configmap was automatically created but that has since changed, took me a bit to figure out when that changed as their docs aren’t explicit if I remember correctly. Annoying either way.

    I think the reason most tutorials turn off the firewall is in a well configured cloud environment like AWS the host firewall is redundant due to security groups and that is what everyone targets the tutorials for unfortunately and they never explain that even with “disable this if you have other mitigating controls in place” or something.

    I have also wondered if we have finally reached the era where the majority of content creators and consumers have never touched an on-prem network and don’t even think about that lens anymore, another good example of this is trying to configure MetalLB in a host with multiple interface that don’t have the same networks available (you know, like using dedicated interfaces for storage like you should), for a long time it just wasn’t possible and metallb would announce all networks on all interfaces which made it basically not functional heh. Whatever the reason is, you are not alone in being annoyed :D

    Anyway, these are great points, I have been pondering writing up a larger set of tutorial about my setup since it’s more similar to a small enterprise anymore, I should get on that hah.