Question High Error Output on Trunk Interface - Help Troubleshooting

matiasht

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Oct 17, 2011
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Hello everyone, new to the forum here!

We have three switches in our company, one of them is the core switch, and the other two is where our client PCs are connected. The switch core also has an ESXi Server connected to it, where all of our services are hosted. Additionally, we have a Cisco ASA Firewall connected to it. In order to monitor our interfaces and other devices/servers, we use Zabbix 4.0.

Everything was working normally, we hired +35 people, and everything is practically the same, however, we are getting alerts on Zabbix about high error rate on output interface Gi 1/0/22, this is one of the trunk ports which is connected to one of our non-core switches where end users are connected to. Sometimes we also receive alerts for interface 1/1/2 which is where our outside interface on the Cisco ASA is connected to, this last one goes away after some minutes, and it only pops-up from time to time.

However, our Gi 1/0/22 alert stays there for over an hour, then it goes away, and re-appears. The cabling of these interfaces was changed two days ago on a schedule where no people was working. The alert still pops up however reducing from an hour to 25-30 minutes. So, that might be an improvement, but I am still concerned about the alert. What other options do we have in order to troubleshoot this issue? Should I post an image of our interface?

I'd be eternally thankful for the help! :)
 
So did this EVER worked right, or did you just inherited this situation?

Both boxes in the same room? (cable length issue), is trunk link optical? (blow out dust on connectors). May wanna open the boxes and give it a good vacuum, note dead fan(s) (heat issue).

After that u may have a failing switch(es). Even solid state can fail.
 
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matiasht

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Oct 17, 2011
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Hi, thanks for the reply.

Yes, it did work, and it still works, but with the alert. It started happening after we surpassed the 100 employees

Cables were replaced, and they're cooper
 
Jun 8, 2019
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Hi Matiasht,

When you say error rate are you talking about CRC errors or output drops seen on the physical interface?
 

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