H3C Technologies H3C S3100 Series Switches - Manual (Page 425)

Operation Manual – Cluster
H3C S3100-52P Ethernet Switch Chapter 1 Cluster
1-2
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It provides the topology discovery and display function, which assists in monitoring
and maintaining the network.
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It allows you to configure and upgrade multiple switches at the same time.
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It enables you to manage your remotely devices conveniently regardless of
network topology and physical distance.
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It saves IP address resource.
HGMP V2 comprises the following three protocols:
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Neighbor discovery protocol (NDP): This protocol is able to discover directly
connected neighbor devices and provide information about those devices,
including device type, software/hardware version, connecting port, and some
other information such as device ID, port full/half duplex mode, product version,
and Boot ROM version.
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Neighbor topology discovery protocol (NTDP): This protocol is able to discover
network topology and provide network topology information. It collects device and
device connection information in your network and allows you to adjust the range
of topology discovery.
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Cluster management protocol: This protocol provides the member recognition and
member management functions. It works in conjunction with the network
management software to implement large-scale network management. Member
recognition means that the management device locates and recognizes each
member in the cluster so that it can redirects configuration and management
commands to the its members. Member management means that the
management device manages such events as adding a member and removing a
member, and such cluster parameter settings as handshake interval, cluster
management VLAN and shared FTP server settings.
Cluster-related configurations will be described in later sections.
1.1.2 Introduction to NDP
NDP is a protocol used to discover adjacent nodes and provide information about them.
NDP operates at the data link layer, and therefore it supports different network layer
protocols.
NDP is able to discover directly connected neighbors and provide the following
neighbor information: device type, software/hardware version, and connecting port. In
addition, it may provide the following neighbor information: device ID, port full/half
duplex mode, product version, Boot ROM version and so on.
An NDP-enabled device maintains an NDP neighbor table. Each entry in the NDP table
can automatically ages out. You can also clear the current NDP information manually to
have neighbor information collected again.
An NDP-enabled device regularly broadcasts NDP packet through all its active ports.
An NDP packet carries a holdtime field, which indicates how long the receiving devices