Cisco Systems 78-13983-04 manual Interface type Slot number/Interface number

Chapter 2 First-Time Configuration

Before You Begin

Figure 2-1 Front of the MWR 1900

	VWIC LEDs:
Fast	Alarm (A)
	Loopback (A)
ethernet	Carrier detect (G)		VWIC LEDs:
LEDs:	VWIC	VWIC
Activity (G)			Alarm (A)
Speed (G)	position 2	position 0	Loopback (A)
Link (G)	(future)	2 ports	Carrier detect (G)

	SEE
	MANUAL		DSU
	BEFORE	INSTALLATION
			56K
				SEE	MANUAL
						BEFORE
						INSTALLATION
Network module				CONSOLE		AUXILIARY
								Air vent (both sides)
slot (future)	Compact		Console
2 FE
ports	flash slot VWIC			port				Power (G)
							Auxiliary
	position 1							Status (G)	Chassis LEDs	65783
	2 ports						port	Activity (G)

The Cisco MWR 1900 router chassis contains the following LAN and WAN interface types:

•Two built-in Fast Ethernet LAN interfaces

•Two slots in which you can install Voice/WAN interface cards (VWICs) The slot numbers are as follows:

•0 for all built-in interfaces

•0 for all VWIC interfaces

The numbering format is:

Interface type Slot number/Interface number

Interface (port) numbers begin at 0 for each interface type, and continue from right to left.

The two built-in Ethernet 10/100 interfaces are Fast Ethernet 0/0 and Fast Ethernet 0/1.

The slot number for all VWIC interfaces is always 0. (The W0 and W1 slot designations are for physical slot identification only.) Interfaces in the VWICs are numbered from right to left, starting with 0/0 for each interface type, regardless of the physical slot in which the VWICs are installed.

For example, if you have a VWIC in each VWIC slot, then the interfaces are Serial 0/0 and Serial 0/1 in physical slot W0 and Serial 0/2 and Serial 0/3 in physical slot W1. However, if you install a VWIC in physical slot W1 (leaving slot W0 empty), the interfaces in slot W1 are Serial 0/0 and Serial 0/1. If you then add a VWIC to slot W0, the interface numbering will shift. The configuration that you created for interfaces Serial 0/0 and Serial 0/1 will now be applied to the VWIC in slot W0 and you will need to create a new configuration for the interfaces that you previously configured on W1 (which will now be Serial 0/2 and Serial 0/3).

Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide

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