Expand Configuration and Management Manual (G06.24+)

Subsystem Description

Expand Configuration and Management Manual—523347-008

18-38

Message Handling and Buffer Allocation

This subsection presents a high-level overview of how data is sent and received over

an Expand network and how incoming and outgoing data is buffered. It is necessary to

understand this information to effectively configure, manage, and troubleshoot an

Expand network.

This subsection describes the following topics:

•

Outgoing Traffic Flow on page 18-38

•

Incoming Traffic Flow on page 18-42

Outgoing Traffic Flow

Outgoing traffic is data that is sent from the local node to another node in the network.

Outgoing traffic includes

•

Locally originated traffic (requests and replies created by a process at the local

node that are destined for a remote node).

•

$NCP traffic (messages created by the local $NCP that are destined for the $NCP

at a neighboring node).

•

Passthrough traffic (requests or replies created at a remote node that are being

forwarded to another node).

Note. This subsection refers to modifiers that allow you to control message handling and

buffer allocation. For detailed information about these modifiers, refer to Section 17, Expand

Modifiers.