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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 configura-
tion as shown below, and disables time synchronization on the switch.
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
IP Address
Server Ranking According to
Decimal Value of IP Address
10.28.227.141 Primary
10.28.227.153 Secondary
10.29.227.100 Tertiary
Even though the Time Sync Mode is set to Timep,
time synchronization is disabled because no ip
timep has disabled the TimeP Mode parameter.