C
HAPTER
20
| System Management Commands
Time
– 755 –
ntp server This command sets the IP addresses of the servers to which NTP time
requests are issued. Use the no form of the command to clear a specific
time server or all servers from the current list.
SYNTAX
ntp server ip-address [key key-number]
no ntp server [ip-address]
ip-address - IP address of an NTP time server.
key-number - The number of an authentication key to use in
communications with the server. (Range: 1-65535)
DEFAULT SETTING
Version number: 3
COMMAND MODE
Global Configuration
COMMAND USAGE
â—† This command specifies time servers that the switch will poll for time
updates when set to NTP client mode. It issues time synchronization
requests based on the interval set with the ntp poll command. The
client will poll all the time servers configured, the responses received
are filtered and compared to determine the most reliable and accurate
time update for the switch.
â—† You can configure up to 50 NTP servers on the switch. Re-enter this
command for each server you want to configure.
â—† NTP authentication is optional. If enabled with the ntp authenticate
command, you must also configure at least one key number using the
ntp authentication-key command.
â—† Use the no form of this command without an argument to clear all
configured servers in the list.
EXAMPLE
Console(config)#ntp server 192.168.3.20
Console(config)#ntp server 192.168.3.21
Console(config)#ntp server 192.168.5.23 key 19
Console(config)#
RELATED COMMANDS
ntp client (754)
show ntp (756)
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