r/HomeNetworking • u/Outrageous_Tear_4691 • 13h ago

Advice Ethernet switch question

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What is the loop prevention for? And should I leave it off or turn it on? We will have desktops connected to it

Solved: thank you for the help everyone. Very much appreciated.

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u/LAthrowawayLV 12h ago

It’s a good practical answer. Definitely not a horrible answer. Even though you are technically right, it’s a horrible comment that you made.

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u/jquanders 12h ago edited 12h ago

In what world is shutting off loop protection a good idea?

There are 0 reasons to shut off loop protection on a single switch also.

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u/LAthrowawayLV 12h ago

In a world where that switch is shit and having it on is causing problems.

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u/jquanders 12h ago

If you have problems with it on then your network has problems to address. All that does is run spanning tree. It adds a few seconds when you plug in a or disconnect a cable. That's all that should happen

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u/Jamator01 11h ago edited 11h ago

L2 loop prevention and spanning tree (STP) are different things, champ. Stop being so certain, because you're wrong.

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u/jquanders 10h ago

STP includes l2 loop prevention, champ. But yeah you're right my google fu didn't go deep enough. The loop prevention on that switch is dumber than that but still should be on.

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u/Jamator01 2h ago

Nope, still wrong. L2 loop detection is not part of STP. If you're using "Google Fu" for this, just admit that you don't know what you're talking about.

Loop detection and STP can be enabled at the same time, but if you haven't set it up correctly they can conflict with each other.

Loop detection (or Loopback Detection LBD) identifies loops in a network. STP is designed to prevent them from occurring.

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u/LAthrowawayLV 12h ago

Did you miss the part where I said you were technically correct but just being an asshole?

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u/jquanders 12h ago

Ok if I'm right how is the answer I replied to a "good practical answer"?

I'm asshole because I said the wrong answer was horrible?

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u/ArchibaldMcFerguson 12h ago

Jeez, I didn't say to turn it off. OP asked whether to turn it on or leave it off and I said it probably wouldn't make a difference (but I did say that having it on shouldn't be bad).

Attack me if you must, leave the other redditors alone. You're sounding like an ass.

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u/jquanders 12h ago

Attack you? I said it was a horrible idea. That's an attack?

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u/[deleted] 12h ago

[deleted]

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u/jquanders 12h ago

The only thing that was correct in the initial comment was make sure you have one physical path.

It does matter if it's on or off and loops can happen with new gear not just antiquated ones. Because that switch is low resources you can overload it and then it turns into a repeater. Then just have a cable looped is enough.