Ntdp; Device Table - TP-Link JetStream T2700G-28TQ User Manual

The following entries are displayed on this screen:
Global Config

NDP:
Aging Time:
Hello Time:
Port Config

UNIT:
Selected Port(s):
Unselected Port(s):
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 this setting will be invalid
and will not take effect.

17.2 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.
NTDP hop delay: Indicates the time between the switch receiving NTDP request packets and

the switch forwarding NTDP request packets for the first time.
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 Config
pages.

17.2.1 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.
Select Enable/Disable NDP function globally.
Enter the period for the neighbor switch to keep the NDP packets
from this switch.
Enter the interval to send NDP packets.
Select the unit ID of the desired member in the stack.
Select a port will enable NDP function of the port.
Unselect a port will disable NDP function of the port.
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