4.SNTP Sever URL: set the SNTP server IP address.
5.Daylight Saving Period Start: set up the Daylight Saving beginning time. Daylight Saving benign time will be different in every year.
6.Daylight Saving Period End: set up the Daylight Saving ending time. Daylight Saving ending time will different in every year.
7.Daylight Saving Offset (mins): set up the offset time.
8.Switch Timer: display the switch current time.
9.Click
Apply 
.
SNTP Configuration interface
IGMP Configuration
The Internet Group Management Protocol (IGMP) is an internal protocol of the Internet Protocol (IP) suite. IP manages multicast traffic by using switches, routers, and hosts that support IGMP. Enabling IGMP allows the ports to detect IGMP queries and report packets and manage IP multicast traffic through the switch. IGMP have three fundamental types of message as follows:
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