Beware The Bad Crimping Job

After reorganizing my server room, I was getting really poor connectivity. Connections were dropping, dealing with 500+ms pings, etc. ¬†Thought it might’ve been too many data cables running together (HDMI and data were running together, maybe interference between the two?). That being said, they’re all twisted-pair, which is supposed to deal with that. Determined very quickly that the cable density wasn’t the issue.

Turns out the culprit was a bad crimping job on the cable line.
The cable in question:
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Pulled the end off with two fingers:

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You can’t see it in there, but the connection between the shield and the connector was only about 1/5 connected. Replaced the bad section, and problem solved!