209
Just bought a new toy for 100€, full 48 port gigabit POE! It's pretty nice, I like it!
(lemmy.world)
this post was submitted on 24 Aug 2023
209 points (97.7% liked)
homelab
6605 readers
1 users here now
founded 4 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Autonegotiation allows two devices, such as switches or network interface cards, to automatically exchange information about their capabilities and configure the best possible connection settings, like speed and duplex mode. This enables devices to establish a link with optimal settings for both. Without it, this needs to be done manually
Yeah I already knew what autonego is, but this bit I didn't understand, why POE/POE+ would affect auto nego ?
If I had to guess, negotiating POE voltage. Some stuff uses nonstandard voltage like some older ubiquiti gear
Oh, yeah okay, well, we'll see if I encounter this issue!
That switch does it with CDP.
Auto negotiation is not an L2 process. It is a physical layer process that is performed before a CDP or LLDP packet can be transmitted.
He's not talking about speed/duplex auto negotiation. He's talking about automatic power negotiation.
Pretty sure it also supports lldp