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labsdb1001's switch port negociating at 100M
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Description

labsdb1001's switch port is at 100M, and some traffic spikes (up to 90M) are triggering LibreNMS' alerts.
https://librenms.wikimedia.org/device/device=19/tab=port/port=2286/

show interfaces ge-1/0/10 extensive
Link mode: Full-duplex, Flow control: Symmetric, Remote fault: OK, Link partner Speed: 100 Mbps

According to the host's ethtool, the interface is supposed to support 1G.

sudo ethtool eth0
Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full
Speed: 100Mb/s

This is usually due to a faulty interface or cable, I suggest we do the following one after the other:

  1. Replace the patch cable
  2. Change the port on the host
  3. Change the port on the router

Until then I muted the alerts related to that port, we need to not forget to unmute them when the issue is fixed.