Disabling Ntp On An Interface; Configuring A Source Ip Address For Ntp Packets; Configuring Ntp Authentication - Dell S6000–ON Configuration Manual

• Set the interface to receive NTP packets.
INTERFACE mode
ntp broadcast client
Example of Configuring NTP Broadcasts
2w1d11h : NTP: Maximum Slew:-0.000470, Remainder = -0.496884

Disabling NTP on an Interface

By default, NTP is enabled on all active interfaces. If you disable NTP on an interface, Dell Networking OS
drops any NTP packets sent to that interface.
To disable NTP on an interface, use the following command.
• Disable NTP on the interface.
INTERFACE mode
ntp disable
To view whether NTP is configured on the interface, use the show config command in INTERFACE
mode. If ntp disable is not listed in the show config command output, NTP is enabled. (The show
config command displays only non-default configuration information.)

Configuring a Source IP Address for NTP Packets

By default, the source address of NTP packets is the IP address of the interface used to reach the
network.
You can configure one interface's IP address include in all NTP packets.
To configure an IP address as the source address of NTP packets, use the following command.
• Configure a source IP address for NTP packets.
CONFIGURATION mode
ntp source interface
Enter the following keywords and slot/port or number information:
– For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port/
subport information.
– For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.
– For a Loopback interface, enter the keyword loopback then a number from 0 to 16383.
– For a port channel interface, enter the keywords port-channel then a number.
– For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
To view the configuration, use the show running-config ntp command in EXEC privilege mode
(refer to the example in

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 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.
System Time and Date
Configuring NTP Authentication).
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