Installing and Administering Internet Services

Chapter 7 213

Conﬁguring NTP

Overview

Figure 7-7 Example of Relationships Between Time Servers

In Figure 7-7, Gordo and Bonita are stratum-1 servers. Because they are

stratum-1 servers, they receive time from external clocks or use their

local system clocks as time sources for NTP. Gordo and Bonita may have

peer relationships with other stratum-1 time servers (preferably in other

administrative domains). Penelope is a client of Bonita and Golden is a

client of Gordo. Penelope and Golden are peers to each other. They are

also broadcasters. Hugo is a broadcast client to both Penelope and

Golden.

“Conﬁguration” on page 214 contains examples of how these roles are

conﬁgured for xntpd.

Stratum 1

Stratum 2

Stratum 3

Gordo

Penelope

Golden

Hugo

(server)

(client)

(peer) (peer)

(broadcaster)

(broadcast client)

Bonita