Cheap stratum 1 NTP server

A cool project for an IT person or someone with a Raspberry Pi: build a small stratum one NTP server.

Enterprise NTP servers with GPS modules can cost thousands.  A Raspberry Pi based NTP server is a small form factor inexpensive way to get GPS based NTP time.  Other good uses, especially at small sites, remote offices, or co-location facilities:

• DHCP
• Out-of-band/management network
• Performance monitoring, troubleshooting, packet capture