Purpose
Command or Action
Device(config-if)#
exit
(Optional) Change the estimated round-trip delay between
the device and the NTP broadcast server
[
no
]
ntp broadcastdelay microseconds
Example:
Step 7
The default is 3000 microseconds. The range is from 1 to
999999.
Device(config)#
ntp broadcastdelay 100
Use the
no
form of this command to disable the interface
from receiving NTP broadcast packets.
Returns to privileged EXEC mode.
end
Example:
Step 8
Device(config)#
end
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
To create an access group and assign a basic IP access list, perform this procedure:
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
[
no
]
ntp access-group
{
query-only
|
serve-only
|
serve
|
peer
}
access-list-number
4.
access-list access-list-number permit source
[
source-wildcard
]
5.
end
DETAILED STEPS
Purpose
Command or Action
Enables privileged EXEC mode.
enable
Step 1
Example:
Enter your password if prompted.
Device>
enable
Enters global configuration mode.
configure terminal
Example:
Step 2
Device#
configure terminal
System Management Configuration Guide, Cisco IOS XE Gibraltar 16.10.x (Catalyst 9200 Switches)
22
Administering the Device
Configuring NTP Access Restrictions
