1-9
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
Cisco 3600 Series Routers Voice Interface Numbering
Voice interfaces are numbered differently from WAN interfaces described in the previous section,
“
Cisco 3600 Series Router Unit Numbering
.” Voice interfaces are numbered as follows:
interface type chassis slot/voice module slot/voice interface
If you have a 4-channel voice network module installed in slot 1 of your router, the voice interfaces will
be:
•
Slot 1, voice network module slot 0, voice interface 0, referred to as voice 1/0/0 (closest to chassis
slot 0)
•
Slot 1, voice network module slot 0, voice interface 1, referred to as voice 1/0/1
•
Slot 1, voice network module slot 1, voice interface 0, referred to as voice 1/1/0
•
Slot 1, voice network module slot 1, voice interface 1, referred to as voice 1/1/1 (farthest from
chassis slot 0)
Figure 1-9
Cisco 3600 Series Unit Numbers
Cisco 3700 Series Interface Numbering
Each WAN and LAN interface on a Cisco 3700 series router is identified by a slot number and a unit
number. The Cisco 3700 series includes the Cisco 3725 and Cisco 3745.
Cisco 3725 Router Interface Numbering
The Cisco 3725 router chassis contains the following wide-area network (WAN) and local area network
(LAN) interface types:
•
Two built-in FastEthernet LAN interfaces
•
Three slots in which you can install WAN interface cards (WICs)
•
One single-width slot (slot 1) in which you can install one network module
•
One double-width slot (slot 2) in which you can install one single-width or double-width network
module
Power supply
BRI 1/0
Ethernet 1/0
Ethernet 0/1
Ethernet 0/0
Ethernet 1/1
H8604
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
AC
T
SERIAL
AC
T
SEE MANUAL BEFORE INSTALLATION
ETHERNET 1
Serial 1/0
Serial 0/1
Serial 0/0