Cabletron Systems 6SSRM-02, Инструкция по установке и эксплуатации, Страница: 25 / 74

Hardware Overview
Introduction 1-11
External Controls
The 6SSRM-02 has the following external controls. Where appropriate, this guide describes how
to use the controls.
• A COM port for serial connection from a management terminal. Use this port to establish a
direct CLI connection to the 6SSRM-02. The default baud rate is 9600.
• A 10Base-T/100Base-TX Data Terminal Equipment (DTE) port for network connection from
a management terminal. The port is configured as Media Data Interface (MDI). Use this port to
establish a CoreWatch management connection to the 6SSRM-02 over a local or bridged
Ethernet segment.
• A Reset switch. Use this switch to reboot the 6SSRM-02’s motherboard from the internal boot
flash in the event of a system failure. The Reset switch is recessed in the 6SSRM-02’s chassis,
so you will have to use a tool like a small allen wrench to activate the switch.
• CPU Status LED: Red Fatal System Error
Yellow Diagnostic Mode
Yellow/Flashing Boot PROM is Active
Green Functioning Normally
Motherboard Features
The internal “motherboard” performs all the 6SSRM-02’s computing and routing functions. It
contains system-wide bridging and routing tables. Traffic that does not yet have an entry in the L2
and L3/L4 lookup tables on individual line cards is handled by the motherboard. After processing
traffic, the motherboard updates the L2 and L3/L4 tables on the ports that received the traffic. The
ports thus “learn” about how to forward traffic.
Boot Flash
The motherboard has a boot flash containing the 6SSRM-02’s boot software and configuration
files. The system software image file resides on an internal flash chip and can be upgraded from a
TFTP server.
RAM Memory
The 6SSRM-02’s motherboard uses 128MB of RAM to hold routing and other tables. This RAM
is “fixed” and is not removable or upgradable.