1-28
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1 Overview of the Routers
Slot, Port, and Interface Information
SM interface not supported interface1/port interface1-2/port
2
interface1-4/port
3
interface1-2/port
interface1-4/port
Double-Wide
SM interface
not supported interface1/port
4
interface2/port
5
interface4/port
6
interface2/port
interface4/port
HWIC on SM interfaces
VWIC on SM interfaces
not supported interface1wic-slot/port interface1-2/wic-
slot/port
7
interface1-4/wic-
slot/port
8
interface1-2/wic-
slot/port
interface1-4/wic-
slot/port
1. On the Cisco 2901 router, the numbering format for configuring an asynchronous interface is 0/slot/port. To configure the line associated with an
asynchronous interface, use the interface number to specify the async line. For example, line 0/1/0 specifies the line associated with interface serial 0/1/0
on a WIC-2A/S in slot 1. Similarly, line 0/2/1 specifies the line associated with interface async 0/2/1 on a WIC-2AM in slot 2.
2. Applies only to Cisco 2951, Cisco 3925, and Cisco 3925E routers.
3. Applies only to Cisco 3945 and Cisco 3945E routers.
4. Applies only to Cisco 2921 router.
5. Applies only to Cisco 2951, Cisco 3925, and Cisco 3925E routers.
6. Applies only to Cisco 3945 and Cisco 3945E routers.
7. Applies only to Cisco 2951, Cisco 3925, and Cisco 3925E routers.
8. Applies only to Cisco 3945 and 3945E routers.
Table 1-11 Slot, Port, and Interfaces (continued)
Slots, Ports, Interface 2901
1
2911 & 2921 2951 & 3925 & 3945 3925E & 3945E
Ta b l e 1-12 Interface Numbering on Cisco 2911, 2921, 2951 ISRs and Cisco 3900 ISRs
Port Location IOS Command Line Interface Examples
1,
2
Interface card (DW-EHWIC,
EHWIC,HWIC, HWIC-D, WIC,
VWIC, VIC) plugged directly
into an EHWIC slot
Interface-type 0 / interface-card-slot
3
/ port interface serial 0/x/y
interface async 0/x/y
line 0/x/y
4
interface fa 0/x/y
voice-port 0/x/y
Interface card (WIC, VWIC,
VIC) plugged into a service or
network module
Interface-type 1
5
/ interface-card-slot / port controller t1 1/x/y
voice-port 1/x/y
interface serial 1/x/y
interface async 1/x/y
line 1/x/y
4
Built into a service or network
module (NME, NME-X, NMD,
NME-XD)
Interface-type 1
5
/ port interface gi 1/x
interface serial 1/x
interface async 1/x
line 1/x
4
FXS or FXO port in an extension
voice module (EVM)
Interface-type 2 / 0 / port
FXS/DID port numbers 0 to 7 are built into the EVM.
FXS/FXO port numbers 8 to 15 are in expansion module 0.
FXS/FXO port numbers 16 to 23 are in expansion module 1.
voice-port 2/0/x
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