{"id":3003,"date":"2020-06-15T00:00:00","date_gmt":"2020-06-15T07:00:00","guid":{"rendered":"https:\/\/digitalnigel.com\/wordpress\/?p=3003"},"modified":"2020-12-21T16:40:17","modified_gmt":"2020-12-22T00:40:17","slug":"homebrew-datacenter-oob-stratum-1","status":"publish","type":"post","link":"https:\/\/digitalnigel.com\/wordpress\/?p=3003","title":{"rendered":"Homebrew Datacenter OOB & Stratum 1"},"content":{"rendered":"\n

I have a rack of gear down at a datacenter down in California, where I’ve got a single internet connection. It’s quite reliable and performs well, but I wanted a backup means to reach my equipment in the case of an outage, or in the potential case of a router misconfig that breaks external connectivity.<\/p>\n\n\n\n

I had an extra 1U rackmount case from the PoE PDU project<\/a>, and with the LTE modems I’ve been using for the Cellular Webcams<\/a>, it seemed very reasonable to put something together and have an inexpensive Out of Band connection to my remote installation.<\/p>\n\n\n\n

At the same time, I had plenty of room in the case for another Raspberry Pi, and another person who has gear in the same facility noted that *some* GPS signal was available inside, though perhaps not great, so I searched for a reasonably high gain GPS antenna, and decided to add a NTP Stratum 1<\/a> time server as well.<\/p>\n\n\n\n

I designed a couple of very basic custom PCBs, one to combine the two power supplies to provide redundancy, and the GPS board for the Stratum 1 Pi. Added a basic character LCD I had laying around in the junk pile to provide visible status.<\/p>\n\n\n\n