ntp server
This command is used to configure the NTP servers.
Syntax
[no] ntp server
ntp server <IP-ADDR|IPv6-ADDR> [key <key-id>] [oobm] [max-poll <max-poll-val>][min-poll <min-poll-val>][burst | iburst] [version <1-4>]
Parameters/Options
[no]
Removes the unicast NTP configurations on the device.
Subcommands
IP-ADDR
Sets the IPv4 address of the NTP server.
IPV6-ADDR
Sets the IPv6 address of the NTP server.
oobm
Specifies that the NTP Unicast server is accessible over an OOBM interface.
key <key-id>
Specifies the authentication key.
max-poll <max-poll-val>
Configures the maximum time intervals in power of 2 seconds. Range is 4–17 (e.g., 5 would translate to 2 raised to 5 or 32).
min-poll <min-poll-val>
Configures the minimum time intervals in seconds. Range is 4–17.
burst
Enables burst mode.
iburst
Enables initial burst mode.
version
Sets version 1–4.
Usage
A maximum of 8 NTP servers can be configured.
Example
switch(config)# ntp
server Allow the software clock to be synchronized by an NTP
time server.
broadcast Operate in broadcast mode.
unicast Operate in unicast mode.
switch(config)# ntp server
IP-ADDR IPv4 address of the NTP server.
IPV6-ADDR IPv6 address of the NTP server.
switch(config)# ntp server <IP-ADDR>
Key Specify the authentication key.
switch(config)# ntp server <IP-ADDR> key key-id
Max-poll Configure the maximum time intervals in seconds.
switch(config)# ntp server <IP-ADDR> key key-id max-poll
<4-17> Enter an integer number.
Switch(config)# ntp server <IP-ADDR> key key-id
Min-poll Configure the minimum time intervals in seconds.
switch(config)# ntp server <IP-ADDR> key key-id min-poll
<4-17> Enter an integer number.
switch(config)# ntp server <IP-ADDR> key key-id prefer max-poll
<max-poll-val> min-poll <min-poll-val>
iburst Enable initial burst (iburst) mode.
burst Enable burst mode.
Switch(config)# ntp server IP-ADDR key key-id prefer maxpoll <number>
minpoll <number> iburst
Restrictions
Validation |
Error/Warning/Prompt |
---|---|
If authentication key-id not configured |
Authentication key-id has not been configured. |
If Key-id is not marked as trusted |
Key-id is not trusted. |
When min poll value is more than max poll value |
NTP max poll value should be more than min poll value. |