Table 6
Interface Numbering on Cisco 2801 Series Routers
Slot Number
Onboard ports
0
1
2
3
1. A VWIC in slots 1, 2, and 3 can operate in both data and voice mode; in slot 0, a VWIC can operate only in voice mode.
Note
On the Cisco 2801 router, the numbering format for configuring an asynchronous interface is 0/slot/port
line associated with an asynchronous interface, simply use the interface number to specify the asynchronous 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.
Table 7
Interface Numbering on Cisco 2811, Cisco 2821, and Cisco 2851 Series Integrated Services Routers
Port Location
Built into the chassis front panel
Built into the chassis rear panel
In an interface card (HWIC,
HWIC-D, WIC, VWIC, VIC)
plugged directly into an HWIC slot
in a chassis
In an interface card (WIC, VWIC,
VIC) plugged into a slot in a network
module
Built into a 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 (EVM)
Slot Type
Fast Ethernet
VIC/VWIC (voice only—no PRI support)
1
HWIC/WIC/VIC/VWIC
1
WIC/VIC/VWIC
1
HWIC/WIC/VIC/VWIC
Interface Numbering Scheme
Interface-type port
Interface-type 0 / port
Interface-type 0 / interface-card-slot
Note
Interface card slots built into the chassis are labeled
HWIC slot-number on Cisco 2800 series routers .
5
Interface-type 1
5
Interface-type 1
6
Interface-type 2
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.
6
Interface-type 2
Port numbers are 8 to 11 in expansion module 0.
Port numbers are 16 to 19 in expansion module 1.
6
Interface-type 2
Port numbers are 0 to 3 if one expansion module is installed.
Port numbers are 0 to 7 if two expansion modules are installed.
Interface Numbering Range
0/0 and 0/1
0/0/0 to 0/0/3
0/1/0 to 0/1/3 (single-wide HWIC)
0/1/0 to 0/1/8 (double-wide HWIC)
0/2/0 to 0/2/3
0/3/0 to 0/3/3 (single-wide HWIC)
0/3/0 to 0/3/8 (double-wide HWIC)
3
/ port
/ interface-card-slot / port
/ port
7
/ 0
/ port
7
/ 0
/ port
/ port
.
To configure the
1, 2
Examples
usb 0
usb 1
interface fa 0/x
interface gi 0/x
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
31
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