Specifications

2-2
Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
Nodal Processor Module
Nodal Processor Module
The IGX nodal processor module (NPM) group consists of a front card (called NPM) and a system clock
module (SCM) back card.
The NPM performs the following major functions:
• Runs the software for controlling, configuring, diagnosing, and monitoring the IGX switch.
• Sends configuration and control commands over the control bus to other cards in the switch.
• Receives statistics, status, and alarm messages from the other cards in the switch.
• Generates all system bus control signals for directing the interpretation of address buses and
controlling data transfers.
• Communicates with other nodes and network management devices in the network.
The NPM has a 68040 microprocessor-based system controller running switch software for the IGX
chassis and communicates with other IGX cards over the control bus. In conjunction with the system
bus, the NPM is responsible for system timing, network control, and status reporting.
Figure 2-1 illustrates the relation of the NPM to other parts of the system (including attached
peripherals).
Figure 2-1 NPM in Relation to the System
Cisco
WAN Manager
SCM
Utility bus
Redundant
NPM
Corporate network
AUI
NPM
Ext clock
Ext monitor
Modem
Printer
*
*
H8313
AUI