102
Deleted (aussie.zone)
submitted 5 months ago by to c/selfhosted@lemmy.world
39 comments fedilink hide all child comments
๐Ÿ‘ 1
you are viewing a single comment's thread
view the rest of the comments
[โ€“] 2 points 5 months ago* (5 children)

The only limitation I know is WOL doesn't work after a power outage, because the switch and RPI doesn't know where to find the target machine

maybe, but the pi does not need to know that, only the mac address and the interface. the switch doesn't need to know either because it's a broadcast frame, it's forwarded to all cables. the problem sometimes is that if you configure WOL from linux, the network adapter will probably forget on power cycling that it is supposed to react to magic packets. I think not all hardware is susceptible to that, but even then it could help to configure WOL in the BIOS

@SuspiciousCarrot78@aussie.zone

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 5 child comments
    •
  • [โ€“] 1 point 5 months ago (4 children)

    Maybe something else going on then, but ive never gotten WOL to work after a blackout when there's two switches between sender and receiver. After powering up the receiver once, WOL works again

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 4 child comments
    •
  • [โ€“] 1 point 5 months ago (2 children)

    Switches probably need to figure out which way a particular MAC is (unlike a hub, which just express everywhere). That's the switching part. If they power off, the tables will be empty.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [โ€“] 2 points 5 months ago (1 child)

    Yeah that was my assumption. But I hadn't considered WOL being broadcast, so now I'm not so sure. I would assume it's broadcast on both IP and Ethernet layer. It's time to do some wiresharking :)

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •
  • [โ€“] 2 points 5 months ago

    I don't think WoL works over IP. In my mind it's lower (LAN, e.g. ethernet) level. But if it used IP, you'd need to get ARP going before it routes. An "offline" network chip could probably manage that, though.

    I'm curious to know what you find. Wireshark is always fun and fun and enlightening. :)

  • permalink
  • fedilink
  • source
  • parent