Huawei Quidway S5600 Series Operation Manual page 774

Operation Manual – Cluster
Quidway S5600 Series Ethernet Switches-Release 1510
the received NDP packets rather than forward them. The corresponding data entry in
the NDP table is updated when the received information is different from the existing
one. Otherwise, only the holdtime of the corresponding entry is updated.
1.1.3 Introduction to NTDP
NTDP is a protocol for network topology information collection. NTDP provides the
information about the devices that can be added to clusters and collects the topology
information within the specified hops for cluster management.
Based on the NDP information table created by NDP, NTDP transmits and forwards
NTDP topology collection request to collect the NDP information and neighboring
connection information of each device in a specific network range for the management
device or the network administrator to implement needed functions.
Upon detecting a change occurred on a neighbor, a member device informs the
management device of the change through handshake packets. The management
device then collects the specified topology information through NTDP. Such a
mechanism enables topology changes to be tracked in time.
Note:
As for NTDP implementing, you need to perform configurations on the management
device, the member devices, and the candidate devices as follows:
On the management device, enable NTDP both globally and for specific ports, and
configure the NTDP settings.
On each member device and candidate device, enable NTDP both globally and for
specific ports. As member devices and candidate devices adopt the NTDP settings
configured for the management device, NTDP setting configurations are not
needed.
1.1.4 Introduction to Cluster
A cluster has one (and only one) management device. Note the following when creating
a cluster:
You need to designate the management device first. The management device of a
cluster is the portal of the cluster. That is, any operations performed in external
networks and intended for the member devices of a cluster, such as accessing,
configuring, managing, and monitoring, can only be implemented through the
management device.
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Chapter 1 Cluster