Nov 12

N7K-AC-6.0KW Power supply failure in a Cisco Nexus 7010

After many years working on network equipment I have seen too many power supplies fail. These power supply failures are usually on old power supplies that have been running for many years. I have had newer power supplies fail due to high temperatures, usually due to air conditioner failures. I did have the pleasure of being in the room when a power supply blew in an old FORE Systems chassis. There was a loud pop and a bright flash. It was accompanied by a loud yell by the tech that was sitting in front of it at the time.

The latest power supply failure was on a N7K-AC-6.0KW. If you are not familiar with this power supply, it is a 6KW supply that takes two 220 power circuits. The Nexus 7010 holds three of these power supplies. Nobody was around when this failure happened, I’m sure it was loud when it blew. When the component failed, it blew a hole in the housing of the power supply. Thankfully it didn’t catch on fire.

These power supply failures are why I don’t like single power supply devices. I want all of my network gear to have more then one removable power supply. Unfortunately, network vendors don’t always provide an option for dual removable power supplies. I have found that some vendors really increase the price of the network device when they add these removable power supplies. In critical areas, the extra cost is worth it.

What Power supply failures have you had to work on?
Have you had a power supply catch on fire?
Have you experienced a power supply failure taking down a chassis when there was still a good supply in the chassis?
If so, tell us about it!!!

Failed N7K-AC-6.0KW

Failed N7K-AC-6.0KW