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Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01
Chapter 1 Overview of the Cisco 4451-X Integrated Services Router
About Slots and Interfaces
Figure 1-9 Ports and Slots on the Cisco ISR 4451-Xs
Slot Numbering
Slots are numbered 0, 1 and 2.
• About Slot 0
• About Slot 1 and 2
• Additional Slots
About Slot 0
The following are the main features of Slot 0:
• Slot 0 is the motherboard and not removable. It is reserved for integrated ports and NIMs.
• The front panel GE ports (or native interface ports) always reside in slot 0 and bay 0. There are four
ports, and they are called Gigabitethernet 0/0/0, Gigabitethernet 0/0/1, Gigabitethernet 0/0/2, and
Gigabitethernet 0/0/3.
• PVDM4s do not have an external slot number. Therefore, the nomenclature for PVDM4s always has
0 in the first tuple. For example, the 3-tuple for an PVDM4 might be 0/4/x.
1 Gigabit Ethernet management port 2 USB port 0
3 USB console 4 Auxiliary port
5 Gigabit Ethernet port 0 6 Small-form-factor pluggable (SFP) 0
7 SFP 2 8 Gigabit Ethernet port 2
9 Gigabit Ethernet port 3 10 SFP 3
11 SFP 1 12 Console port
13 Gigabit Ethernet port 1 14 HDD 2 LED
15 HDD 1 LED 16 USB port 1
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