TP-Link TL-SG3216 TL-SG3216 V1 User Guide - Page 192
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13.2 NTDP NTDP (Neighbor Topology Discovery Protocol)is used for the commander switch to collect NDP information. NTDP transmits and forwards NTDP topology collection request based on NDP neighbor information table, and collects the NDP information and neighboring connection information of each device in a specific network range. The commander switch can collects the specified topology in the network regularly and you can also enable topology collection manually on the commander switch. After the commander switch sends out NTDP request packets, lots of switches receive the request packets and send out response packets at the same time, which may result in network congestion and the commander switch overload. To avoid the above problem, two time parameters are designed to control the spread speed of NTDP request packets. z NTDP hop delay: Indicates the time between the switch receiving NTDP request packets and the switch forwarding NTDP request packets for the first time. z NTDP port delay: Indicates the time between the port forwarding NTDP request packets and its adjacent port forwarding NTDP request packets over. The NTDP function can be implemented on Device Table, NTDP Summary and NTDP Comfit pages. 13.2.1 Device Table On this page you can view the information of the devices collected by NTDP. Meanwhile, no matter whether a cluster is established, on this page you can manually collect NTDP information at any time to manage and control devices. Choose the menu Cluster→NTDP→Device Table to load the following page. Figure 13-5 Device Table The following entries are displayed on this screen: ¾ Device Table Device Type: Displays the device description collected through NTDP. Device MAC: Displays the MAC address of this device. Cluster Name: Displays the cluster name of this device. Role: Displays the role this device plays in the cluster. z Commander: Indicates the device that can configure and manage all the devices in a cluster. z Member: Indicates the device that is managed in a cluster. z Candidate: Indicates the device that does not belong to any cluster though it can be added to a cluster. z Individual: Indicates the device with cluster feature disabled. 185