Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 1106

Disabling NTP on an Interface By default, NTP is enabled on all active interfaces. If you disable NTP on an interface, the system 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 loopback interface, enter the keyword loopback then a number between 0 and 16383. • For a port channel interface, enter the keyword lag then a number from 1 to 255. • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port information. • For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information. • For a port extender (PE) 1 Gigabit Ethernet interface, enter the keyword peGigE then the pe-id/pe- stack-unit-id/port-number information. The pe-id range is from 0 to 255; the stack unit number range is from 0 to 7; and the port-ID range is from 1 to 48. • 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). System Time and Date 1106