Specifying a Source Interface
When the system sends an NTP packet, the source
IP address is normally set to the address of the interface through which the NTP
packet is sent. Use the source-interface command to configure a specific interface from which
the IP source address will be taken. To remove the specified source IP address,
use
the no form of the command.
device(config-ntp)# source-interface ethernet 1/3/1
The specified interface will be used for the source IP address for all packets sent to all destinations.
Note: If the source-interface is not configured,
then the lowest IP address in the outgoing interface will be used in the NTP
packets. The source IP address of a tunnel interface is not supported.