1-5
Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-03
Chapter 1
Understanding Interface Numbering and Cisco IOS Software Basics
Understanding Interface Numbering
Figure 1-3
Cisco 3660 Router Rear View
Figure 1-4
Cisco 3640 Router Rear View
Figure 1-5
Cisco 3620 Router Rear View
18030
VCC OK
SYSTEM
FDX
LINK
100Mbps
FDX
1
0
LINK
100Mbps
ETH 0
ETH 3
ETHERNET
4E
ETH 2
ETH 1
1
2
3
ACT
LINK
0
CN/LP RXC
SERIAL 3
SERIAL 2
SERIAL 1
SERIAL 0
RXD
TXC
TXD
CN/LP RXC RXD TXC TXD
CN/LP RXC RXD TXC TXD
CN/LP RXC RXD TXC TXD
EN
SERIAL
4T
VOICE
2V
V0
V1
EN
HIGH SPEED SERIAL
1HSSI
H
TD
TC
RD
RC
LB/CN
Slot 5
Slot 3
Slot 1
Slot 6
Slot 4
Slot 2
SEE MANUAL BEFORE INSTALLATION
VIC
FXS
IN USE
IN USE
1
0
Slot 0
Slot 0
Slot 1
Power supply
Slot 3
H6551
INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS
2E
2W
W1
ETHERNET 1
ETHERNET 0
EN
AUI
WO
ACT
LNK
ACT
LNK
AC
T
SERIAL
BRI
NT1
B1
B2
NT1
2
3
1
2E
2W
W1
STP
ETHERNET 0
AUI
EN
ACT
LNK
ACT
LNK
DO NOT INSTALL WAN INTERFACE
CARDS WITH POWER APPLIED
Slot 2
AC
T
SERIAL
SEE MANUAL BEFORE INSTALLATION
ETHERNET 1
2E
2W
W1
1
ETHERNET 1
ETH 1
ETHERNET 0
EN
AUI
WO
ACT
LNK
ACT
LNK
AC
T
SERIAL
BRI
NT1
B1
B2
NT1
2E
2W
W1
ETHERNET 0
AUI
EN
ACT
LNK
ACT
LNK
DO NOT INSTALL WAN INTERFACE
CARDS WITH POWER APPLIED
AC
T
SERIAL
SEE MANUAL BEFORE INSTALLATIO
N
Slot 0
H7238
Slot 1
0
ETHERNET 1