Cisco OL-4015-08 User Manual page 480

Date and Time: Clock Properties
Prefer
Interface
Note
Authentication Key
Cisco Router and Security Device Manager Version 2.2 User's Guide
23-6
Click this box if this is to be the preferred NTP server.
Select the router interface that will provide access to the NTP Server. You can use
the show IP routes CLI command to determine which interface has a route to this
NTP server.
An extended access rule will be created traffic for port 123 traffic and applied to
the interface that you select in this window. If an access rule was already in place
for this interface, SDM will add statements to permit port 123 traffic on this
interface. If the existing rule was a standard access rule, SDM changes it to an
extended rule in order to be able to specify traffic type and destination.
Check this box if the NTP server uses an authentication key, and enter the
information required in the fields. The information in these fields must match the
key information on the NTP server.
Key Number
Enter the number for the authentication key. The key number range is 0 through
4294967295.
Key Value
Enter the key used by the NTP server. The key value can use any of the letters A
through Z, uppercase or lowercase, and can be no longer than 32 characters.
Confirm Key Value
Reenter the key value to confirm accuracy.
Chapter 23 Router Properties
OL-4015-08