Setting clock from CLI is not allowed in this VDC

If you’re trying to set the time on a brand new out of box Cisco Nexus 5500 and you get the message “Setting clock from CLI is not allowed in this VDC.”, it’s because the clock protocol is set to ntp, even though you didn’t configure NTP. Go into config and type “clock protocol none”, and then it will let you set the time.

Then, when you’ve finished the config, set up NTP!

And while you’re at it, this page from Cisco is awesome for troubleshooting VPC

Sometimes you can’t get to here from there.

Sometimes things look impossibe. Like screwing in a screw with a handle directly above it (seriously, if I ever met the person who designed this..)

If I ever meet the person responsible for this, I'm punching them in the face

But there’s always a way around things. In this case, I used my fingers to tighten it into place.

Or this screw, which was cross threaded and wouldn’t come out. It didn’t stand up to a pair of channel locks. Sometimes you have to take the hard way.

And sometimes? What you don’t know is a blessing. I don’t have any photos of this unfortunately. But let’s say there was a two storey building, and on the second storey, was a server room, with two 50U racks inside it. You would think – ok, I need to add another one, these two obviously got in here. You enlist some burly gentlemen to help you move the rack up the stairs, and find problem 1 – it doesn’t fit through the back stairs. They take it down the back stairs, and up the front. Problem 2 – it doesn’t fit through the front door standing up, so you lay it down and move it into the corridor in front of the server room. Problem 3 – there are fire sprinklers in the middle of the ceiling, so you can’t stand it up. I scratched my head for a while, and then started removing bits of drop ceiling, until I found a section big enough to get it standing up, without any sprinkler pipes under it. I stood it up, and then went to move it into the server room. Same issue – but found another part of the drop ceiling without pipes to angle it down again to fit through the lower server room door. And it’s done and in place. I went back to the company’s office and asked them how they got the original racks in there?

The older and wiser sysadmin, who I hadn’t been working on for this project, answer sagely: “we built the room around them”. Sometimes not knowing is the solution to your problem. I doubt I would have even tried if I knew that…