In this episode Dorothy and I try to understand the ISC DHCP server fail over configuration. There are two servers, primary and secondary. The servers work in a load balancing configuration by splitting the subnet in half. We understand that part. The rest is a confusing mix that we’re not sure we get at all. Talking about the options helps.

A DHCP failover setup requires accurate time. That’s where NTP comes in. While we haven’t configured our DHCP failover setup yet, we did manage to install NTP. It’s a small step in the right direction.

LINKS

  1. ISC DHCP failover example: https://kb.isc.org/article/AA-00502/0/A-Basic-Guide-to-Configuring-DHCP-Failover.html
  2. dhcpd.conf man page: https://linux.die.net/man/5/dhcpd.conf
  3. NTP Server on Ubuntu 16.04: https://www.digitalocean.com/community/tutorials/how-to-set-up-time-synchronization-on-ubuntu-16-04