System Module Overview; Management Cpu Module - 3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual

System Module
Overview
Management CPU
Module
The PathBuilder S700 includes the following two system modules:
Management Central Processing Unit (MCPU) module
n
STX Module
n
The MCPU module, located in slot 1 of the PathBuilder S700 shelf, performs all
configuration, monitoring and user interface functions. It features the following:
Management processor
n
Two RS-232 interfaces (one for terminal interface and one for SLIP/PPP
n
interface)
Ethernet port (for management of the PathBuilder S700 via the network)
n
CPU memory consisting of a real time clock, dynamic RAM, and dual FLASH.
n
The dual FLASH is used so that the code can be upgraded and two copies of
the code can be stored at one time. The CPU can run either copy of the code
under user control and the CPU code can be upgraded on-line.
Two sets of three relay contacts for critical, major, and minor visual and audible
n
alarms, located on the rear of the unit. The alarm relays are normally open.
They trigger the audible and visual alarms whenever the CPU determines there
is a critical, major, or minor alarm. You can cut off the audible alarm (open the
relay) by pressing the ACO button.
Relay contacts for up to three external alarms from outside equipment for
n
which the alarm indication is activated when the input pins are shorted. You
can set these alarms to be either normally open or normally closed. For details
about setting the state of the external alarms, see "Configuring the Shelf" in
Chapter 5.
A SAR interfacing an ATM bus. The SAR is used for communication and
n
signaling. It can send and receive packets from the ATM network under CPU
control. The user interface allows you to enter management VCs in the same
way any other VC is entered. Management VCs terminate on the CPU SAR.
User interface software that allows you to interface to the system in multiple
n
ways:
Through an RS-232 port for direct VT100 Connection. The CPU contains the
n
VT100 drivers to control the management and user interface screens.
Through a second RS-232 port to run SLIP/PPP. This port can connect via a
n
modem to the user management network. You can then run a Telnet
session to access the NMS screens.
Through the direct Ethernet connection. You can then run a Telnet session
n
to access the NMS screens.
SNMP support via the RS232 SLIP/PPP and the Ethernet connection. The
n
PathBuilder S700 supports multiple standard MIBs for the bridge, Ethernet,
DS1, DS3, and ATM Forum compliant IMA functions. It also supports an
Enterprise MIB that allows you to configure and monitor the unit using an
SNMP-based Enterprise management system such as 3Com's Transcend.
The CPU stores all the code that runs on the system and runs diagnostics at
bootup to check the integrity of the system.

System Module Overview

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