System Messages and Recovery Procedures for the Cisco Nexus 3000 Family

This chapter includes system messages for the Cisco NX-OS Nexus 3000 family of switches. The messages are listed in alphabetical order by the system facility that produces them. Within each system facility section, messages are listed alphabetically by severity and mnemonics. Each error message is followed by an explanation and a recommended action.

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What Cisco Output Commands Are In A “Show Tech” On The Nexus 5000?

Have you ever wondered what commands were actually in a “show tech” on the Nexus 5000? Well, I did. There seems to be a lot of info in there, and there really is. I compiled a list of commands that a show tech runs on a Nexus 5000 and have listed them below. Enjoy!

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What Does DOM Mean for a SFP Transceiver?

If you take a look at the description of a SFP transceiver module, you will see the “DOM support” appeared in the product details. What does it mean? In fact, DOM or Digital Optical Monitoring as the words implies, is used for monitoring some parameters of the transceiver, which can help to identify the location of the fiber link failure, simplify maintenance, improve system reliability. Obviously a SFP with DOM function is high-ender than one without it. This is why most of modern optical SFP transceivers support DOM functions. To have a further understanding of DOM, some detailed information will be introduced in the following passage. Continue reading

How to Upgrade a Cisco Nexus 5500

Everyone usually gets nervous when it comes time for Core upgrades — or any upgrade for that matter. You never know what your gonna hit or if your maintenance window will be longer than it has to! Luckly your you reading this blog post, I’ll have setup by step instructions on what I did to get my Nexus 5ks upgraded to the latest suggested code as of this writing – Release 5.2(1)N1(7).

First, before any upgrade is done, you want to ensure you read the Release Notes for your particular version.. Continue reading