SNTP unicast time polling with multiple SNTP servers

When running SNTP unicast time polling as the time synchronization method, the switch requests a time update from the server you configured with either the Server Address parameter in the menu interface, or the primary server in a list of up to three SNTP servers configured using the CLI. If the switch does not receive a response from the primary server after three consecutive polling intervals, the switch tries the next server (if any) in the list. If the switch tries all servers in the list without success, it sends an error message to the Event Log and reschedules to try the address list again after the configured Poll Interval time has expired.

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.

HP Switch(config)# show management
 
 Status and Counters - Management Address Information

  Time Server Address : fe80::215:60ff:fe7a:adc0%vlan10

  Priority SNTP Server Address                            Protocol Version
  -------- ---------------------------------------------- ----------------
  1 2001:db8::215:60ff:fe79:8980                          7
  2 10.255.5.24                                           3
  3 fe80::123%vlan10                                      3


  Default Gateway : 10.0.9.80

  VLAN Name    MAC Address         | IP Address
  ------------ ------------------- + -------------------
  DEFAULT_VLAN 001279-88a100       | Disabled
  VLAN10       001279-88a100       | 10.0.10.17

Adding and deleting SNTP server addresses

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

HP Switch(config)# sntp server 2001:db8::215:60ff:fe79:8980
HP 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.

Deleting addresses

Syntax:

no sntp server <ip-addr>

Deletes a server address. If there are multiple addresses and you delete one of them, the switch re-orders the address priority.

Example:

To delete the primary address in the above Example: and automatically convert the secondary address to primary:

HP Switch(config)# no sntp server 10.28.227.141