Installation guide

4-46 Cisco 4000 Series Installation Guide
Preparing to Make Connections
For information on how to remove and replace network processor modules, see the section
“Replacing Network Processor Modules” in the chapter “Configuring the Cisco 4000
Series Chassis.”
Figure 4-1 Router—Rear View Showing Slot Numbering and Interface Ports
Unit Numbering
Unit numbering allows the system to distinguish between two interfaces of the same type.
As viewed from the rear of the chassis, the unit numbering of the network processor
modules increments from zero counting from the right to left. The system assigns unit
number addresses to these network modules by starting with zero for each module interface
type and numbering from right to left and from bottom to top. The lowest unit number of
that interface type is the module closest to the power supply. For example, the unit number
addresses for the modules in Figure 4-1 are listed in Table 4-1.
Serial
module
H4596
10BASE-T
TX
RX
AUI
LNK
POL
TX
RX
AUI
LNK
POL
ETHERNET AUI
PORT-0
PORT-1
PORT-3
PORT-2
PORT-1
PORT-0
76543210
ISDN
BRI
PORT-7
PORT-6
PORT-5
PORT-4
Slot 3
10BaseT
ports
AUI
ports
Slot 2
Chassis
release screw
Ethernet module
Four port
BRI
module
Auxiliary port
Console port
BRI ports
Serial interface ports
Slot 1
Power
On/off switch
LEDs
P-3
P-1
P-2
P-0
P-3 P-2 P-1`
P-0
LP
CN
TD
TC
RD
RC
LP
CN
TD
TC
RD
RC
LP
CN
TD
TC
RD
RC
LP
CN
TD
TC
RD
RC