Operation Manual

302
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 this setting will be invalid
and will not take effect.
16.2 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.
16.2.1 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 16-5 Device Table