Specifications

4-11
System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 4 Administering the Switch
Configuring NTP
To disable the interface from sending NTP broadcast packets, use the no ntp broadcast interface
configuration command.
EXAMPLE
This example shows how to configure a port to send NTP Version 2 packets:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ntp broadcast version 2
Configuring the Switch to Receive NTP Broadcast Packets
DETAILED STEPS
To disable an interface from receiving NTP broadcast packets, use the no ntp broadcast client interface
configuration command. To change the estimated round-trip delay to the default, use the no ntp
broadcastdelay global configuration command.
EXAMPLE
This example shows how to configure a port to receive NTP broadcast packets:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ntp broadcast client
Configuring NTP Access Restrictions
You can control NTP access on two levels as described in these sections:
• Creating an Access Group and Assigning a Basic IP Access List, page 4-12
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface to receive NTP broadcast packets, and enter
interface configuration mode.
Step 3
no shutdown Enable the port, if necessary. By default, UNIs and enhanced
network interfaces (ENIs) are disabled, and NNIs are enabled.
Step 4
ntp broadcast client Enable the interface to receive NTP broadcast packets.
By default, no interfaces receive NTP broadcast packets.
Step 5
exit Return to global configuration mode.
Step 6
ntp broadcastdelay microseconds (Optional) Change the estimated round-trip delay between the
switch and the NTP broadcast server.
The default is 3000 microseconds; the range is 1 to 999999.
Step 7
end Return to privileged EXEC mode.
Step 8
show running-config Verify your entries.
Step 9
copy running-config
startup-config
(Optional) Save your entries in the configuration file.