Chapter 2
2 - 2
Figure 2.1 A sample network layout showing data paths
Synchronizing configurations and broadcasting performance
metrics
3-DNS Controllers typically work in sync groups, where a group of
controllers shares load balancing configuration settings. In a sync group, any
system that has new configuration changes can broadcast the changes to any
other system in the sync group, allowing for easy administrative
maintenance. To distribute metrics data among the systems in a sync group,
the principal 3-DNS Controller sends requests to the big3d agents in the
network, asking them to collect specific performance and path data. Once