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Verify the Hardware Configuration
Verify the router hardware configuration by entering the following commands:
• show version—Displays the system hardware version; the installed software version; the names and sources of configuration
files; the boot images; and the amount of installed DRAM, NVRAM, and flash memory.
• show diag—Lists and displays diagnostic information about the installed controllers, interface processors, and port
adapters. Typical examples are network modules, interface cards (WICs, VWICs, HWICs) and advanced integration
modules (AIMs).
7 Interface Numbering
Each individual interface (port) on a Cisco 1841 router is identified by a number. A Cisco 1841 router contains the following
wide-area network (WAN) and local-area network (LAN) interface types:
• Two onboard Fast Ethernet LAN interfaces
• Two slots in which you can install WICs, VWICs (data only), and HWICs
The numbering format for the slots is
interface-type 0/slot-number/port-number. Table 4 summarizes the interface numbering.
CF Green On when compact flash memory is busy. Do not remove CompactFlash memory card
when this light is on.
Back
FDX (FE 0) Green On indicates full-duplex operation. Off indicates half-duplex operation. Back
100 (FE 0) Green On indicates a 100-Mbps link. Off indicates a 10-Mbps link. Back
Link (FE 0) Green On when the router is correctly connected to a local Ethernet LAN through Ethernet
port 0.
Back
FDX (FE 1) Green On indicates full-duplex operation. Off indicates half-duplex operation. Back
100 (FE 1) Green On indicates a 100-Mbps link. Off indicates a 10-Mbps link. Back
Link (FE 1) Green On when the router is correctly connected to a local Ethernet LAN through Ethernet
port 1.
Back
AIM Green On indicates presence of an AIM in the internal AIM slot. Back
Table 4 Interface Numbering
Slot Number Slot Type Slot Numbering Range Example
1
1. The interfaces listed are examples only; other possible interface types are not listed.
Onboard Ports Fast Ethernet 0/0 and 0/1 interface fastethernet 0/0
Slot 0 HWIC/WIC/VWIC
2
2. VWICs are data-only in Cisco 1841 routers.
0/0/0 to 0/0/3 interface serial 0/0/0
line async 0/0/0
Slot 1 HWIC/WIC/VWIC
2
0/1/0 to 0/1/3 interface serial 0/1/0
line async 0/1/0
Table 3 LED Indicators (continued)
LED Color Description Location