# 10 Configuring Multi-Node Systems

Purpose

The CSP uses the proprietary EXNET® to connect multiple CSP chassis into a single virtual CSP. EXNET® is an open architecture, 1.3 Gbps fiber optic network that uses a packet-based protocol. When you use EXNET® to link up to seven CSP chassis into a single virtual programmable platform, the CSPs are then called nodes within the system.

In this section:

EXNET-ONE Card

EXNET-ONE Card Software Functions

EXNET® Features

Configuration

Distributed Layer 4 Call Processing

Call Flows

EXNET® Redundancy

CSP Conferencing

Host Control

In-Service Upgrades

Expanding the EXNET® Ring

Enhanced Ring Fault Tolerance

Failure Processing

Ring Controller State Machine Global States

Fault Detection and Switchover

Passive Addition Process

EXNET® Ring Timing

Frequently Asked Questions