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-To use SNTP support, add define CONFIG_CMD_SNTP to the
-configuration file of the board.
-
-The "sntp" command gets network time from NTP time server and
-syncronize RTC of the board. This command needs the command line
-parameter of server's IP address or environment variable
-"ntpserverip". The network time is sent as UTC. So if you want to
-set local time to RTC, set the offset in second from UTC to the
-environment variable "time offset".
-
-If the DHCP server provides time server's IP or time offset, you
-don't need to set the above environment variables yourself.
-
-Current limitations of SNTP support:
-1. The roundtrip time is ignored.
-2. Only the 1st NTP server IP, in the option ntp-servers of DHCP, will
- be used.