Cisco Systems 3600 Interface Numbering, Cisco 3620 and Cisco 3640 Interfaces, Slot Numbering

Chapter 1 Overview of Cisco 3600 Series Routers

Interface Numbering

Interface Numbering

Cisco 3620 and Cisco 3640 Interfaces

Each individual network interface on a Cisco 3620 or Cisco 3640 router is identified by a slot number and a unit number.

Slot Numbering

The Cisco 3620 or Cisco 3640 router chassis contains two or four slots in which you can install modules. You can install any module into any available slot in the chassis. For Cisco 3620 and Cisco 3640 routers, the slots are numbered as follows:

•Slot 0 is at the bottom right (as viewed from the rear of the chassis), near the power supply.

•Slot 1 is at the bottom left.

•Slot 2 is at the top right, above slot 0.

•Slot 3 is at the top left, above slot 1.

Unit Numbering

Cisco 3600 series routers have unit numbers that identify the interfaces on the modules and WAN interface cards installed in the router. Unit numbers begin at 0 for each interface type, and continue from right to left and (if necessary) from bottom to top. Modules and WAN interface cards are identified by interface type, slot number, followed by a forward slash (/), and then the unit number; for example, Ethernet 0/0.

Figure 1-7shows a router with a 2E 2-slot module in slots 0 and 1. Two serial WAN interface cards are installed in the module in slot 0. One serial and one ISDN BRI WAN interface card are installed in the module in slot 1.

Figure 1-7 Cisco 3600 Series Unit Numbers

Serial 0/1

Serial 0/0

Serial 1/0

BRI 1/0

3

2E
2W W1							2
	B1
	B2
	SEE
	MANUAL BEFORE	INSTALLATION	BRI		W0	2E
			NT1
						2W W1
1	ETHERNET 1				SERIAL
				ETHERNET 0	AUI	SERIAL	W0
					EN
						ETHERNET 1	SERIAL
thernet 1/1						ETHERNET 0	AUI
							EN
							INPUT 100-
			Ethernet 1/0				240VAC	50/60HZ	3.0-1.5
										AMPS

Ethernet 0/1 Ethernet 0/0

Power supply

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Cisco 3600 Series Routers Hardware Installation Guide

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