Adding addresses
As mentioned earlier, you can configure one SNTP server address using either the Menu interface or the CLI. To configure a second and third address, you must use the CLI. To configure the remaining two addresses, you would do the following:
Creating additional SNTP server addresses with the CLI
switch(config)# sntp server priority <1-3> 2001:db8::215:60ff:fe79:8980 switch(config)# sntp server 10.255.5.24
NOTE:
If there are already three SNTP server addresses configured on the switch, and you want to use the CLI to replace one of the existing addresses with a new one, you must delete the unwanted address before you configure the new one.