Network loops are real. Network loops are common. Network loops are the leading cause of people screaming “for fucks sake!” After spending far too long looking for other solutions to why the network goes down intermittently.
Comment on how to build a loopback device
Kn1ghtDigital@lemmy.zip 4 weeks ago
… What does this do to a network anyway? Nothing, right?
haywire7@lemmy.world 4 weeks ago
hperrin@lemmy.ca 4 weeks ago
If you have a good switch or router, correct. If you have cheap consumer level crap, it could potentially cause a lot of issues until you unplug it. It wholly depends what’s on the other end of those jacks.
TipRing@lemmy.world 4 weeks ago
If you did it at my office, nothing because typically only one of those jacks is cross connected (the other is a spare wire) also our switches use spanning tree. Most network loops I’ve seen have been caused by logical configuration errors.
marcos@lemmy.world 4 weeks ago
If you remember to use a cross-over cable, it ruins the address resolution protocol and stops everything from working.
Modern routers have code exclusively to detect it and disable the ports.
Thunderwolf@lemmy.world 4 weeks ago
And if you don’t have spanning tree enabled, this could be a big problem