Cisco 2900 Series Installation Manual page 48

Slot, Port, and Interface Information
Table 1-12 Interface Numbering on Cisco 2911, 2921, 2951 ISRs and Cisco 3900 ISRs
Port Location
Interface card (DW-EHWIC,
EHWIC,HWIC, HWIC-D, WIC,
VWIC, VIC) plugged directly
into an EHWIC slot
Interface card (WIC, VWIC,
VIC) plugged into a service or
network module
Built into a service or network
module (NME, NME-X, NMD,
NME-XD)
FXS or FXO port in an extension
voice module (EVM)
Voice port in a BRI expansion
module (internal slot) in an
extension voice module (EVM)
BRI interface in a BRI expansion
module (internal slot) in an
extension voice module
1. Interface abbreviations: fa = Fast Ethernet; gi = Gigabit Ethernet; USB = universal serial bus; BRI = ISDN basic rate interface.
2. The interfaces listed are examples only; other possible interface types are not listed.
3. Only interface card slot numbers 1 and 3 are used for double-width (HWIC-D).
4. Specify the line number in the Cisco IOS command-line interface (CLI) by using the interface number for the associated asynchronous serial
interface.
5. The network module slot number is 1 for all Cisco 2900 series routers.
On the Cisco 2911, 2921, 2951 routers and Cisco 3900 series routers the interface numbering scheme is
Note
the same for asynchronous interfaces as for other types of interfaces. To configure the line associated
with an async interface, use the interface number to specify the async line. For example, line 0/3/0
specifies the line associated with interface serial 0/3/0 on an WIC-2A/S in slot 3. Similarly, line 1/22
specifies the line associated with interface async 1/22 on an NM-32A in network module slot 1.
Cisco 2900 Series and 3900 Series Hardware Installation Guide
1-30
IOS Command Line Interface
Interface-type 0 / interface-card-slot
5
Interface-type 1 / interface-card-slot / port
5
Interface-type 1 / port
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.
Interface-type 2 / 0 / port
Port numbers are 8 to 11 in expansion module 0.
Port numbers are 16 to 19 in expansion module 1.
Interface-type 2 / port
Port numbers are 0 to 3 if one expansion module is installed.
Port numbers are 0 to 7 if two expansion modules are installed.
Chapter 1
3
/ port
Overview of the Routers
1, 2
Examples
interface serial 0/x/y
interface async 0/x/y
4
line 0/x/y
interface fa 0/x/y
voice-port 0/x/y
controller t1 1/x/y
voice-port 1/x/y
interface serial 1/x/y
interface async 1/x/y
4
line 1/x/y
interface gi 1/x
interface serial 1/x
interface async 1/x
4
line 1/x
voice-port 2/0/x
voice-port 2/0/x
interface bri 2/x