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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 7 Administering the Switch
Managing the System Time and Date
Figure 7-3 Typical NTP Network Configuration
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:
• Default NTP Configuration, page 7-37
• Configuring NTP Authentication, page 7-37
• Configuring NTP Associations, page 7-38
• Configuring NTP Broadcast Service, page 7-39
• Configuring NTP Access Restrictions, page 7-40
• Configuring the Source IP Address for NTP Packets, page 7-42
• Displaying the NTP Configuration, page 7-43
Catalyst 2950 or
3550 switch
Catalyst 2950 or
3550 switch
Catalyst 2950 or
3550 switch
Catalyst 2950 or
3550 switch
These switches are configured in
NTP server mode (server association)
with the Catalyst 6500 series switch.
Catalyst 6500
series switch
(NTP master)
This switch is configured as an NTP
peer to the upstream and downstream
Catalyst 3550 switches.
Catalyst 2950 or
3550 switch
Workstations
Workstations
Local
workgroup
servers
74722