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To disable NTP on an interface, use the following command in the INTERFACE mode:
To view whether NTP is configured on the interface, use the
show config command in the INTERFACE
mode. If
ntp disable is not listed in the show config command output, then NTP is enabled. (The show
config
command displays only non-default configuration information.)
Configure 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 to be included in all NTP packets.
To configure an IP address as the source address of NTP packets, use the following command in the
CONFIGURATION mode:
To view the configuration, use the
show running-config ntp command (Figure 38) in the EXEC privilege
mode.
Command Syntax Command Mode Purpose
ntp disable
INTERFACE Disable NTP on the interface.
Command Syntax Command Mode Purpose
ntp source interface CONFIGURATION Enter the following keywords and slot/port or number information:
• For a 1-Gigabit Ethernet interface, enter the keyword
GigabitEthernet followed by the slot/port information.
• For a loopback interface, enter the keyword loopback followed by
a number between 0 and 16383.
• For a port channel interface, enter the keyword lag followed by a
number from 1 to 255 for TeraScale and ExaScale, 1 to 32 for
EtherScale.
• For a SONET interface, 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 VLAN interface, enter the keyword vlan followed by a
number from 1 to 4094.
E-Series ExaScale platforms support 4094 VLANs with FTOS
version 8.2.1.0 and later. Earlier ExaScale supports 2094
VLANS.