Enhancements in Release F.02.02

New Time Synchronization Protocol Options

Disabling the TimeP Mode. Disabling the TimeP mode means to configure it as disabled. (Disabling TimeP prevents the switch from using it as the time synchronization protocol, even if it is the selected Time Sync Method option.)

Syntax:

no ip timep

Disables TimeP by changing the TimeP mode configuration to Disabled.

For example, if the switch is running TimeP in DHCP mode, no ip timep changes the TimeP configuration as shown below, and disables time synchronization on the switch.

Even though the Time Sync Mode is set to Timep, time synchronization is disabled because no ip timep has disabled the TimeP Mode parameter.

Figure 102. Example of Disabling Time Synchronization by Disabling the TimedP Mode Parameter

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.

Address Prioritization

If you use the CLI to configure multiple SNTP servers, the switch prioritizes them according to the decimal values of their IP addresses. That is, the switch compares the decimal value of the octets in the addresses and orders them accordingly, with the lowest decimal value assigned as the primary address, the second-lowest decimal value assigned as the next address, and the third-lowest decimal value as the last address. If the first octet is the same between two of the addresses, the second octet is compared, and so on. For example:

SNTP Server

Server Ranking According to

IP Address

Decimal Value of IP Address

 

 

10.28.227.141

Primary

10.28.227.153

Secondary

10.29.227.100

Tertiary

 

 

205