Specifications

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System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 4 Administering the Switch
Verifying Configuration
Verifying Configuration
Configuration Example
System Time and Date
This example shows how to configure the switch to synchronize only to devices providing authentication
key 42 in the device’s NTP packets:
Switch(config)# ntp authenticate
Switch(config)# ntp authentication-key 42 md5 aNiceKey
Switch(config)# ntp trusted-key 42
This example shows how to configure the switch to synchronize its system clock with the clock of the
peer at IP address 172.16.22.44 using NTP Version 2:
Switch(config)# ntp server 172.16.22.44 version 2
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
This example shows how to configure a port to receive NTP broadcast packets:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ntp broadcast client
This example shows how to configure the switch to allow itself to synchronize to a peer from access
list 99. However, the switch restricts access to allow only time requests from access list 42:
Switch# configure terminal
Switch(config)# ntp access-group peer 99
Switch(config)# ntp access-group serve-only 42
show mac address-table
dynamic
Displays only dynamic MAC address table entries.
show mac address-table
interface
Displays the MAC address table information for the specified
interface.
show mac address-table
notification
Displays the MAC notification parameters and history table.
show mac address-table static Displays only static MAC address table entries.
show mac address-table vlan Displays the MAC address table information for the specified
VLAN.
Command Purpose
show ntp associations [detail] Display NTP information.
show ntp status Display NTP information.
show clock [detail] Display the time and date configuration.
show running-config Display the DNS configuration.
Command Description