Configuration manual

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– For a port channel interface, enter the keyword port-channel then a number from 1 to 128.

– For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port

information.

– For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.

– For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.

To view the configuration, use the show running-config ntp command in EXEC privilege mode

(refer to the example in Configuring NTP Authentication).

Configuring NTP Authentication

NTP authentication and the corresponding trusted key provide a reliable means of exchanging NTP

packets with trusted time sources.

NTP authentication begins when the first NTP packet is created following the configuration of keys. NTP

authentication in the Dell Networking OS uses the message digest 5 (MD5) algorithm and the key is

embedded in the synchronization packet that is sent to an NTP time source.

To configure NTP authentication, use the following commands.

1. Enable NTP authentication.

CONFIGURATION mode

ntp authenticate

2. Set an authentication key.

CONFIGURATION mode

ntp authentication-key number md5 key

Configure the following parameters:

• number: the range is from 1 to 4294967295. This number must be the same as the number in the

ntp trusted-key command.

• key: enter a text string. This text string is encrypted.

3. Define a trusted key.

CONFIGURATION mode

ntp trusted-key number

Configure a number from 1 to 4294967295.

The number must be the same as the number used in the ntp authentication-key command.

4. Configure an NTP server.

CONFIGURATION mode

ntp server ip-address [key keyid] [prefer] [version number]

Configure the IP address of a server and the following optional parameters:

• key keyid: configure a text string as the key exchanged between the NTP server and the client.

• prefer: enter the keyword prefer to set this NTP server as the preferred server.

• version number: enter a number as the NTP version. The range is from 1 to 3.

System Time and Date

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