TP-Link TL-SL5428E manual Ntdp, Device Table, Port Displays the port number of the switch

Port:	Displays the port number of the switch.
NDP:	Displays NDP status of the current port.
Enable:	Click the Enable button to enable NDP for the port you select.
Disable:	Click the Disable button to disable NDP for the port you select.
Note:

1.NDP function is effective only when NDP function is enabled globally and for the port.

2.The aging time should be set over the hello time value, otherwise the neighbor information table of NDP ports will be unstable

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.

zNTDP hop delay: Indicates the time between the switch receiving NTDP request packets and the switch forwarding NTDP request packets for the first time.

zNTDP 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:

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