Note:
NTP client to server polling is unicast so relies on the NTP client port's IP address being in the same
subnet as the NTP server's IP address. Review the network settings of the port under configuration to ensure
this is the case.
Tip:
If the NTP client should not poll an NTP server and instead synchronize only to broadcasts/
multicasts from an NTP server, this setting should be configured as '0' in all fields, meaning that the
port will never send unicast requests to a server.
4.
Accept or Decline Broadcast Messages
Select whether the NTP client will accept or ignore broadcast messages from an NTP server using the
'CLIENT BROADCAST MESSAGES' radio buttons.
If 'ACCEPT' is selected, the NTP client will synchronize to broadcast messages it receives, if 'DECLINE' is
selected broadcasts will be ignored.
5.
Enter NTP Server IP Address
Enter the IP address of the NTP server that unicast NTP requests will be sent to.
6.
Advanced Settings
Click the 'ADVANCED SETTINGS' dropdown to reveal the advanced NTP settings.
7.
Enable MD5 Authentication
If the NTP server on the network is using MD5 authenticated NTP communication, select 'ENABLE' from the
'ENABLE MD5 AUTHENTICATION' radio buttons. This will reveal the MD5 Authentication Key textboxes and
will authenticate the incoming NTP packets. To set the hash key change one or more of the 'KEY' textboxes
and change the 'NTP DEFAULT PASSKEY INDEX' to the index of the 'KEY' you have changed.
In the below example setting 'NTP DEFAULT PASSKEY INDEX' is set to '1' and will enable the use of the
'key0' as the hashkey.
Provisioning
©
2022 Microchip Technology Inc.
and its subsidiaries
Manual
DS00004572A-page 87
