Specifications

4 Input/Output Controller Replacement Instructions
Input/Output Controller Description
• Nonvolatile random-access memory (NVRAM) for storing the system configuration and
environmental monitoring logs. When replacing the I/O controller, be sure to copy the router’s
running configuration to a Trivial File Transfer Protocol (TFTP) file server so that you can
retrieve it later; otherwise, you will have to reenter your configuration manually. NVRAM uses
lithium batteries to maintain its contents when disconnected from power.
• Two Personal Computer Memory Card International Association (PCMCIA) slots for Flash
Disks or Flash memory cards.
• Flash memory SIMM and Flash Disks or Flash memory cards for storing the boot helper image
and the default Cisco IOS software image.
• Boot ROM for storing sufficient code for booting the Cisco IOS software.
• Two environmental sensors for monitoring the cooling air as it enters and leaves the chassis.
Figure 1 Input/Output Controller—with Fast Ethernet Port (Single MII Receptacle)
Optional Fast Ethernet
port (MII receptacle)
MII
EN
RJ45
LINK
1O PWR
OK
H6000
AUX
CONSOLE
Midplane
connectors
Temperature
sensor
Flash SIMM U99
NVRAM U41
Temperature
sensor
Boot ROM U20
PC Card slots
Console
port
Captive
installation
screw
LEDs and
CPU reset
button
Auxiliary
port
ENABLED
PCMCIA
EJECT
SLOT 0
SLOT 1
FE MII
FAST ETHERNET INPUT/OUTPUT CONTROLLER
FE ENABLE
FE LINK
CPU RESET
1O PWR OK