Cisco Systems 2800 manual Slot Type Interface Numbering Range

Table 6	Interface Numbering on Cisco 2801 Series Routers
Slot Number		Slot Type	Interface Numbering Range
Onboard ports		Fast Ethernet	0/0 and 0/1
0		VIC/VWIC (voice only—no PRI support)	0/0/0 to 0/0/3
1		HWIC/WIC/VIC/VWIC1	0/1/0 to 0/1/3 (single-wide HWIC)
			0/1/0 to 0/1/8 (double-wide HWIC)
2		WIC/VIC/VWIC1	0/2/0 to 0/2/3
3		HWIC/WIC/VIC/VWIC1	0/3/0 to 0/3/3 (single-wide HWIC)
			0/3/0 to 0/3/8 (double-wide HWIC)

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.

On the Cisco 2801 router, the numbering format for configuring an asynchronous interface is 0/slot/port. To configure the 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		Interface Numbering Scheme	Examples1, 2
Built into the chassis front panel		Interface-type port	usb 0
			usb 1
Built into the chassis rear panel		Interface-type 0 / port	interface fa 0/x
			interface gi 0/x
In an interface card (HWIC,		Interface-type 0 / interface-card-slot3 /port	interface serial 0/x/y
HWIC-D, WIC, VWIC, VIC)		Note Interface card slots built into the chassis are labeled	interface async 0/x/y
plugged directly into an HWIC slot			line 0/x/y4
		HWIC slot-numberon Cisco 2800 series routers.
in a chassis			interface fa 0/x/y
			voice-port 0/x/y
In an interface card (WIC, VWIC,		Interface-type 15 / interface-card-slot /port	controller t1 1/x/y
VIC) plugged into a slot in a network			voice-port 1/x/y
module			interface serial 1/x/y
			interface async 1/x/y
			line 1/x/y4
Built into a network module (NME,		Interface-type 15 / port	interface gi 1/x
NME-X, NMD, NME-XD)			interface serial 1/x
			interface async 1/x
			line 1/x4
FXS or FXO port in an extension		Interface-type 26 / 07 / port	voice-port 2/0/x
voice module (EVM)		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 in a BRI expansion		Interface-type 26 / 07 / port	voice-port 2/0/x
module (internal slot) in an		Port numbers are 8 to 11 in expansion module 0.
extension voice module (EVM)
		Port numbers are 16 to 19 in expansion module 1.
BRI interface in a BRI expansion		Interface-type 26 / port	interface bri 2/x
module (internal slot) in an		Port numbers are 0 to 3 if one expansion module is installed.
extension voice module (EVM)
		Port numbers are 0 to 7 if two expansion modules are installed.

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