Configuring Ntp - Cisco Catalyst 2950 Software Configuration Manual

Chapter 7 Administering the Switch
Figure 7-3
Local
workgroup
servers
Workstations

Configuring NTP

The Catalyst 2950 switches do not have a hardware-supported clock, and they cannot function as an NTP
master clock to which peers synchronize themselves when an external NTP source is not available. These
switches also have no hardware support for a calendar. As a result, the ntp update-calendar and the ntp
master global configuration commands are not available.
This section contains this configuration information:
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78-11380-04
Typical NTP Network Configuration
Catalyst 3550
switch
Catalyst 3550
switch
Catalyst 3550
switch
Workstations
Default NTP Configuration, page 7-36
Configuring NTP Authentication, page 7-36
Configuring NTP Associations, page 7-37
Configuring NTP Broadcast Service, page 7-38
Configuring NTP Access Restrictions, page 7-39
Configuring the Source IP Address for NTP Packets, page 7-41
Displaying the NTP Configuration, page 7-42
These switches are configured in
NTP server mode (server association)
with the Catalyst 6500 series switch.
This switch is configured as an NTP
peer to the upstream and downstream
Catalyst 3550 switches.
Catalyst 2950 Desktop Switch Software Configuration Guide
Managing the System Time and Date
Catalyst 6500
series switch
(NTP master)
Catalyst 3550
switch
Catalyst 3550
switch
7-35