D-Link DGS-3620-28TC-SI Product Manual - Page 156

xStack® DGS-3620 Series Managed Switch Web UI Reference Guide To view this window, click L2 Features > NLB FDB Settings, as shown below: Figure 4-117 NLB FDB Settings window The fields that can be configured are described below: Parameter Description VLAN Name Click the radio button and enter the VLAN name of the NLB multicast FDB entry to be created. VID Click the radio button and enter the VLAN by the VLAN ID. MAC Address Enter the MAC address of the NLB multicast FDB entry to be created. Unit Select the unit you wish to configure. Port Choose the forwarding ports for the specified NLB multicast FDB entry. None - The port is not the forwarding port. Click the All button to select all the ports. Egress - The port is the forwarding port. Click the All button to select all the ports. Click the Clear All button to clear out all the information entered. Click the Apply button to accept the changes made. PTP The Precision Time Protocol (PTP) system is able to synchronize the distributed clocks with an accuracy of less than 1 microsecond via Ethernet networks for the very first time. PTP is a technology that enables precise synchronization of clocks in systems. PTP is applicable to systems communicating by local area networks supporting multicast messaging including Ethernet and UDP. PTP enables heterogeneous systems that include clocks of various inherent precision, resolution and stability to synchronize to a grandmaster clock. The synchronization is divided into two processes. The Best Master Clock (BMC) algorithm determines the PTP status (master/slave) of all local ports. The synchronization algorithm computes the clock offset between the master and slave clock. There are two mechanisms, Delay Request-response Mechanism and Peer Delay Mechanism, for measuring the propagation time of an event message. The PTP system has three types of PTP devices, boundary clock, end-to-end transparent clock and peer-to-peer transparent clock. Only boundary clock can participate in the selection of the best master clock. PTP Global Settings This window is used to configure the PTP function globally. To view this window, click L2 Features > PTP > PTP Global Settings, as shown below: 146