pre-Version 
6.1.1.0
Introduced on the E-Series.
Usage 
Information
You can configure multiple time serving hosts (up to 250). From these time serving hosts, the 
FTOS choses one NTP host with which to synchronize. Use the show ntp associations 
command to determine which server was selected.
Because a large number of polls to NTP hosts can impact network performance, Dell Force10 
recommends limiting the number of hosts configured.
Related 
Commands
show ntp associations – displays the NTP servers configured and their status.
ntp source
Specify an interface’s IP address to be included in the NTP packets.
C-Series, E-Series, S-Series, Z-Series
Syntax
ntp source interface
To delete the configuration, use the no ntp source command.
Parameters
interface
Enter the following keywords and slot/port or number information:
• For an 100/1000 Ethernet interface, enter the keyword 
GigabitEthernet followed by the slot/port information.
• For a 1-Gigabit Ethernet interface, enter the keyword 
GigabitEthernet followed by the slot/port information.
• For Loopback interfaces, enter the keyword loopback 
followed by a number from zero (0) to 16383.
• For a Port Channel interface, enter the keyword lag followed 
by a number. For the C-Series and S-Series, the range is 1 to 
128. For the E-Series, the range is 1 to 255 for TeraScale.
• For SONET interface types, enter the keyword sonet 
followed by the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword 
TenGigabitEthernet followed by the slot/port 
information.
• For a 40-Gigabit Ethernet interface, enter the keyword 
fortyGigE followed by the slot/port information.
• For VLAN interface, enter the keyword vlan followed by a 
number from 1 to 4094.
Defaults Not configured.
Command Modes CONFIGURATION
Command History
Version 8.3.11.1 Introduced on the Z9000.
1437