Configuring Ipc - HP 5820X Switch Configuration Manual

Configuring IPC

IPC is a reliable communication mechanism among different nodes. The following are the basic concepts
in IPC.
Node
An IPC node is an entity supporting IPC; it is an independent processing unit. In actual application, an
IPC node corresponds to one CPU. The following guidelines apply:
One centralized device only has one CPU, corresponding to one node.
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Typically, a distributed device is available with multiple boards, each having one CPU. Some, for
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example, service CPU and OAM CPU and are available with multiple CPUs. A distributed device
corresponds to multiple nodes.
An IRF virtual device is an interconnection of several devices, with each member device
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corresponding to one or more nodes. An IRF virtual device corresponds to multiple nodes.
In actual application, IPC is mainly applied on an IRF virtual device or distributed device; it provides a
reliable transmission mechanism between different devices and boards.
Link
An IPC link is a connection between any two IPC nodes. There is one and only one link between any two
nodes for packet sending and receiving. All IPC nodes are fully connected.
IPC links are created when the system is initialized: When a node starts up, it sends handshake packets
to other nodes; a connection is established between them if the handshake succeeds.
The system identifies the link connectivity between two nodes using link status. An IPC node can have
multiple links, each having its own status.
Channel
A channel is a communication interface for an upper layer application module of a node to communicate
with an application module of a peer node. Each node assigns a locally unique channel number to each
upper layer application module to identify this module.
Data of an upper layer application module is sent to the IPC module through a channel, and the IPC
module sends the data to a peer node through the link.
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