User's Manual

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Cisco 3200 Series Wireless MIC Software Configuration Guide
OL-7734-02
Chapter 3 Administering the WMIC
Managing the System Time and Date
3. serve-only—Allows only time requests from a device whose address passes the access list criteria.
4. query-only—Allows only NTP control queries from a device whose address passes the access list
criteria.
If the source IP address matches the access lists for more than one access type, the first type is granted.
If no access groups are specified, all access types are granted to all devices. If any access groups are
specified, only the specified access types are granted.
To remove access control to the WMIC NTP services, use the no ntp access-group {query-only |
serve-only | serve | peer} global configuration command.
This example shows how to configure the WMIC to allow itself to synchronize to a peer from access
list 99. However, the WMIC restricts access to allow only time requests from access list 42:
bridge# configure terminal
bridge(config)# ntp access-group peer 99
bridge(config)# ntp access-group serve-only 42
bridge(config)# access-list 99 permit 172.20.130.5
bridge(config)# access list 42 permit 172.20.130.6
Disabling NTP Services on a Specific Interface
NTP services are enabled on all interfaces by default.
Beginning in privileged EXEC mode, follow these steps to disable NTP packets from being received on
an interface:
To re-enable receipt of NTP packets on an interface, use the no ntp disable interface configuration
command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and specify the interface to disable.
Step 3
ntp disable Disable NTP packets from being received on the interface.
By default, all interfaces receive NTP packets.
Step 4
end Return to privileged EXEC mode.
Step 5
show running-config Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.