Interface Numbering - Cisco CISCO1841 - 1841 Integrated Services Router Hardware Installation Manual

Chapter 1 Overview
Figure 1-11
1
Figure 1-12
9
1
2
3
4
5
1. Inline power is a field-upgradable option only. It is not installed by default.

Interface Numbering

The WAN and LAN interfaces on a Cisco 1800 series fixed-configuration router are numbered as
follows:
•
•
•
OL-6425-03
Front Panel of Cisco 1812 Router
SYS OK POE
CompactFlash Slot
Back Panel of Cisco 1812 Router
1
2
3
ISDN BRI S/T port
USB 2.0 ports
Managed 8-port FE switch
FE WAN ports
Console and AUX ports
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.
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
SWITCH
9 8 7 6 FE1 PPP VPN
LINK B1 B2 CF
S 4 FEX 3 2 FE0
ISDN
4
5
6
7
8
9
6 POE connector
7
Power switch
8
Power connector
RP-TNC antenna connectors (wireless models
9 only)
Interface Numbering
Cisco 1800
Series
1
1
1-11