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Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Chapter 1 Product Overview
Route Processors
•
2 Ethernet port selection LEDs (labeled PRIMARY), when lit these LEDs
identify which of the two Ethernet connections is selected. Because both
ports are supported on the PRP, the LED on port ETH0 is always on. The
ETH1 LED goes on when it is selected.
Alphanumeric displays are organized as two rows of four characters each. The
content of the display is controlled by the MBus module software. The
alphanumeric displays provide information about the system status during the
boot process where the alphanumeric LED displays are controlled directly by the
MBus.
After the boot process, the LEDs are controlled by the Cisco IOS software through
the MBus and display messages are designated by the Cisco IOS software.
The display LEDs indicate the following:
•
Status of the PRP
•
System error messages
•
User-defined status and error messages
Note
A complete, descriptive list of all system and error messages is located in the
Cisco IOS System Error Messages
publications.
Asynchronous Serial Ports
The PRP has two asynchronous serial ports: the console and auxiliary ports. These
allow you to connect external serial devices to monitor and manage the system.
Both ports use RJ-45 receptacles.
The console port provides a data circuit-terminating equipment (DCE) interface
for connecting a console terminal. The auxiliary port provides a data terminal
equipment (DTE) interface and supports flow control. It is often used to connect
a modem, a channel service unit (CSU), or other optional equipment for Telnet
management.
todd.book Page 17 Tuesday, November 27, 2007 6:02 PM
