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Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
OL-6425-03
Chapter 1 Overview
Interface Numbering
Figure 1-11
Front Panel of Cisco 1812 Router
Figure 1-12
Back Panel of Cisco 1812 Router
Interface Numbering
The WAN and LAN interfaces on a Cisco 1800 series fixed-configuration router are numbered as
follows:
•
On the Cisco 1811 and Cisco 1812 routers, the Fast Ethernet 10/100 WAN ports are numbered FE
0 and FE 1; the lower of the two ports is FE 0.
•
On the Cisco 1801, Cisco 1802, and Cisco 1803 routers, the Fast Ethernet 10/100 WAN port is
numbered FE 0.
•
On the Cisco 1811 and Cisco 1812 routers, the Fast Ethernet LAN switch ports are numbered FE 2
through FE 9. The FE 2 port is the lower port, farthest on the right (as viewed from the rear of the
router), and switch ports are numbered incrementally, FE 2 through FE 5, to the left along the
bottom row, and then incrementally, FE 6 through FE 9, to the left along the top row.
1
CompactFlash Slot
SYS OK POE
S
4 FEX 3
2
FE0
LINK
B1
ISDN
B2
CF
9
8
7
SWITCH
6
FE1
PPP
VPN
Cisco 1800
Series
127167
1
1
ISDN BRI S/T port
6
POE connector
1
1.
Inline power is a field-upgradable option only. It is not installed by default.
2
USB 2.0 ports
7
Power switch
3
Managed 8-port FE switch
8
Power connector
4
FE WAN ports
9
RP-TNC
antenna connectors (wireless models
only)
5
Console and AUX ports
127161
1
2
3
4
5
6
7
8
9
9