Set Hop Number For Topology Collection; Set Hop-Delay And Port-Delay For Collected Device To Forward Topology Collection Request - Huawei Quidway S3500 Series Operation Manual

Operation Manual - Integrated Management
Quidway S3500 Series Ethernet Switches
By default, port NTDP is enabled on the ports supporting NDP. If you enable NTDP on a
port not supporting NDP, NTDP cannot be run.

2.3.4 Set Hop Number for Topology Collection

You can set a limit to the hops for topology collection, so that only the topology
information of the devices within the specified hops will be collected and infinitive
collection can be avoided. The collection scope is limited by setting hop limit for
discovery since the switch originating the collection. For example, if you set a limit of 2
to the hop number, only the switches 2 hops away from the first switch transmitting the
topology collection request will be collected.
Perform the following configuration in system view.
Table 2-8 Set hop number for topology collection.
Set hop number for topology collection.
Restore the default hop number for topology collection.
Note that the settings are only valid on the first switch transmitting the topology
collection request. The broader collection scope requires more memory of the
topology-collecting device. Normally, collection is launched by the administrator device
in cluster function.
By default, the topology information of the switches 3 hops away from the collecting
switch is collected.
2.3.5 Set hop-delay and port-delay for Collected Device to Forward Topology
Collection Request.
When the topology requests are disseminated over the network, many network devices
may receive them at the same time and send responses accordingly, which could
cause network congestion and make the topology collector too busy. To avoid such
problem, every device delays a duration (hop delay) after receiving a topology request
until forwards it via the first port. And then it delays for another duration (port delay) until
forwarding it via the next port and so on.
You can use the following commands to configure the hop delay and port delay to
forward topology collection request on the current device.
Perform the following configuration in system view.
Operation
Huawei Technologies Proprietary
2-9
Chapter 2 HGMP V2 Configuration
Command
ntdp hop hop-value
undo ntdp hop