Cisco 7200 VXR router User Manual page 37

Input/Output Controller
The input/output controller shares the system memory functions and the environmental
monitoring functions for the Cisco 7200 VXR routers with the network processing engine.
Note
the configuration note Input/Output Controller Replacement Instructions. This
configuration note accompanies every I/O controller that is shipped from the factory as a
FRU. The configuration note is also available on the Documentation CD-ROM and on
CCO.
The I/O controller consists of the following components:
•
Dual EIA/TIA-232 channels for local console and auxiliary ports. The console port has
full DCE functionality and a DB-25 receptacle. The auxiliary port has full DTE
functionality and a DB-25 plug.
•
An optional Fast Ethernet port, equipped with an MII receptacle and an RJ-45
receptacle (see Figure 1-11), that is configurable for use at 100 megabits per second
(Mbps) full-duplex or half-duplex operation (half-duplex is the default). The I/O
controller without the Fast Ethernet port is shown in Figure 1-12.
The I/O controller equipped with a single MII receptacle, shown in Figure 1-13, is still
supported by Cisco Systems; however it is no longer an orderable product.
Note
RJ-45 receptacle, only one receptacle can be configured for use at a time.
•
NVRAM for storing the system configuration and environmental monitoring logs.
NVRAM uses lithium batteries to maintain its contents when disconnected from power.
•
Flash memory SIMM for storing the boot helper image.
•
Two PC Card slots for Flash Disks or Flash memory cards, which contain 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
Cisco 7206VXR chassis.
Detailed instructions for removing and replacing the I/O controller are contained in
When you use the I/O controller that is equipped with an MII receptacle and an
Input/Output Controller
Cisco 7200 VXR Product Overview 1-27