C H A P T E R
1-1
Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-03
1
Understanding Interface Numbering and
Cisco IOS Software Basics
This chapter provides an overview of the interface numbering in the Cisco 2600 series, Cisco 3600
series, and Cisco 3700 series routers. It also describes how to use the Cisco IOS software commands.
Understanding Interface Numbering
This section contains information with which you should be familiar before you begin to configure your
router for the first time, including interface numbering and what you should do before starting your
router.
Cisco 2600 Series Interface Numbering
Each network interface on a Cisco 2600 series router is identified by a slot number and a unit number.
Table 1-1
lists the router models and summarizes the interfaces supported on each model that are
available in the Cisco 2600 series routers.
Table 1-1
Summary of Cisco 2600 Series Router Models and Interfaces
Model
Ethernet
(10BASE-T)
Token-Ring
(RJ-45)
Fast
Ethernet
(10/100)
Network
Module Slot
WAN
Interface
Card Slots
Advanced
Integration
Module Slots
Cisco 2610
1
1
2
1
Cisco 2610XM
1
1
2
1
Cisco 2611
2
1
2
1
Cisco 2611XM
2
1
2
1
Cisco 2612
1
1
1
2
1
Cisco 2613
1
1
2
1
Cisco 2620
1
1
2
1
Cisco 2620XM
1
1
2
1
Cisco 2621
2
1
2
1
Cisco 2621XM
2
1
2
1
Cisco 2650
1
1
2
1
