Cisco Catalyst 9500 User Manual

Configuring NTP Authentication
To configure NTP authentication, perform this procedure:
Procedure
PurposeCommand 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
Enables NTP authentication.[no] ntp authenticate
Step 3
Example:
Use the no form of this command to disable
NTP authentication
Device(config)# ntp authenticate
Defines the authentication keys.[no] ntp authentication-key number {md5 |
cmac-aes-128 | hmac-sha1 | hmac-sha2-256}
value
Step 4
• Each key has a key number, a type, and a
value.
Example:
• Keys can be one of the following types:
Device(config)# ntp authentication-key
• md5: Authentication using the MD5
algorithm.
42 md5 aNiceKey
• cmac-aes-128: Authentication using
Cipher-based message authentication
codes (CMAC) with the AES-128
algorithm. The digest length is 128
bits and the key length is 16 or 32
bytes.
• hmac-sha1: Authentication using
Hash-based Message Authentication
Code (HMAC) using the SHA1 hash
function. The digest length is 128 bits
and the key length is 1 to 32 bytes.
• hmac-sha2-256: Authentication using
HMAC using the SHA2 hash
function. The digest length is 256 bits
and the key length is 1 to 32 bytes
System Management Configuration Guide, Cisco IOS XE Amsterdam 17.2.x (Catalyst 9500 Switches)
15
Administering the Device
Configuring NTP Authentication

Cisco Catalyst 9500 Specifications

General

Brand	Cisco
Model	Catalyst 9500
Category	Switch
Language	English