Configuring SNTP in unicast mode

As with broadcast mode, configuring SNTP for unicast mode enables SNTP. For unicast operation, however, you must also specify the IP address of at least one SNTP server. The switch allows up to three unicast servers. You can use the Menu interface or the CLI to configure one server or to replace an existing unicast server with another. To add a second or third server, you must use the CLI.

The following is an example of a full SNTP unicast operation.

Procedure

Select the SNTP protocol:
switch(config)# timesync sntp
Set the mode to unicast:
switch(config)# sntp unicast
Specify the SNTP server and set the server priority:
switch(config)# sntp server priority 1 10.28.227.141

This specifies the SNTP server and accepts the current SNTP server version (default: 3).

switch(config)# show sntp
SNTP Configuration
SNTP Authentication : Disabled
Time Sync Mode: Timep
SNTP Mode : disabled
Poll Interval (sec) [720] : 720
Source IP Selection: Outgoing Interface
switch(config)# timesync sntp
switch(config)# sntp broadcast
switch(config)# show sntp
SNTP Configuration
SNTP Authentication : Disabled
Time Sync Mode: Sntp
SNTP Mode : Broadcast
Poll Interval (sec) [720] : 720
Source IP Selection: Outgoing Interface

If the SNTP server you specify uses SNTP v4 or later, use the sntp server command to specify the correct version number. For example, suppose you learned that SNTP v4 was in use on the server you specified above (IP address 10.28.227.141.) You would use the following commands to delete the server IP address , re-enter it with the correct version number for that server.

switch(config)# sntp server priority 1 10.28.227.141 4
switch(config)# show sntp
SNTP Configuration
SNTP Authentication : Disabled
Time Sync Mode: Sntp
SNTP Mode : Unicast
Poll Interval (sec) [720] : 720
Source IP Selection: Outgoing Interface
Priority SNTP Server Address  Version Key-id
-------- -------------------  ------- ----------
1        10.28.227.141          4       0

If the SNTP server you specify uses SNTP v4 or later, use the sntp server command to specify the correct version number. For example, suppose SNTP v4 is in use on the server you specified above (IP address 10.28.227.141.) Use the SNTP commands shown in the following figure to delete the server IP address, and then re-enter it with the correct version number for that server.