CHAPTER 10
Configuring the System Clock
Use the procedures described in this chapter to configure the E Series router clock.
This chapter contains the following sections:
•
Overview on page 507
•
Platform Considerations on page 510
•
References on page 510
•
Setting the System Clock Manually on page 511
•
Before You Configure NTP on page 512
•
NTP Configuration Tasks on page 513
•
Monitoring NTP on page 518
Overview
You can use the
clock
commands to set the time and date on your system manually.
These commands allow you to specify settings such as the source of the time, the time
zone, and dates for seasonal time changes.
You can configure your router to update its clock automatically by configuring it as a
Network Time Protocol (NTP) client. NTP provides a method of synchronizing the system
clocks of hosts on the Internet to Universal Coordinated Time (UTC). Using NTP allows
the system to record accurate times of events. You can view the log file of events to
monitor the status of the network.
Since there is only one system clock, you can configure an NTP client on one virtual router
only. Other virtual routers obtain clock parameters from the system clock. However,
multiple virtual routers can act as NTP servers.
NTP
NTP uses a hierarchical structure of hosts, such as computers and routers, that form
client-server and peer
associations
. An NTP client synchronizes with an NTP server, which
in turn synchronizes with another time source. If two hosts provide synchronization for
each other, they are peers.
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Copyright © 2010, Juniper Networks, Inc.
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