Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) - Manual (Page 279)

Brocade Mobility RFS7000-GR Controller System Reference Guide 265
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Configuring secure NTP
5
NOTE
If this checkbox is selected, the AutoKey Authentication checkbox is disabled, and the switch is
required to use Symmetric Key Authentication for credential verification with its NTP resource.
Additionally, if this option is selected, the broadcast server cannot be selected as a preferred source.
7. Enter the IP Address of the peer or server providing SNTP synchronization.
8. Select the Hostname checkbox to assign a hostname to the server or peer for further
differentiation of other devices with a similar configuration.
9. Use the NTP Version drop-down menu to select the version of SNTP to use with this
configuration Currently version three and version four implementations of NTP are available.
The latest version is NTPv4, but the official Internet standard is NTPv3.
10. If necessary, select the No Authentication checkbox to allow communications with the NTP
resource without any form of security. This option should only be used with known NTP
resources.
11. Select the AutoKey Authentication checkbox to use an Auto key protocol based on the public
key infrastructure (PKI) algorithm. The SNTP server uses a fast algorithm and a private value to
regenerate key information on the arrival of a message. The switch sends its designated public
key to the server for credential verification and the two exchange messages. This option is
disabled when the Broadcast Server checkbox is selected.
12. Select the Symmetric Key Authentication checkbox to use a single (symmetric) key for
encryption and decryption. Since both the sender and the receiver must know the same key, it
is also referred to as shared key cryptography. The key can only be known by the sender and
receiver to maintain secure transmissions.
13. Enter an Key ID between 1-65534. The Key ID is a Key abbreviation allowing the switch to
reference multiple passwords.
14. Select the Preferred Source checkbox if this NTP resource is a preferred NTP resource.
Preferred sources are contacted before non-preferred resources. There can be more than one
preferred source.
15. Refer to the Status field. The Status is the current state of the requests made from the applet.
Requests are any “SET/GET” operation from the applet. The Status field displays error
messages if something goes wrong in the transaction between the applet and the switch.
16. Click OK to save and add the changes to the running configuration and close the dialog.
17. Click Cancel to close the dialog without committing updates to the running configuration.
Viewing NTP associations
The interaction between the switch and a SNTP server constitutes an association. SNTP
associations can be either a peer association (the switch synchronizes to the another system or
allows another system to synchronize to it), or a server association (only the switch synchronizes to
the SNTP resource, not the other way around).
To review the switch’s current SNTP associations: