Cisco 2620

Contents
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Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Understanding Cisco IOS Software Basics 1-13
Getting Help 1-13
Understanding Command Modes 1-13
Undoing a Command or Feature 1-14
Saving Configuration Changes 1-15
Upgrading to a New Cisco IOS Release 1-15
Where to Go Next 1-15
CHAP T ER 2 Using the Setup Command Facility 2-1
Before Starting Your Router 2-1
Using the setup Command Facility 2-2
Configuring Global Parameters 2-2
Configuring Interface Parameters 2-5
Ethernet Interface Configuration 2-6
FastEthernet Interface Configuration 2-6
Token Ring Interface Configuration 2-7
Serial Interface Configuration 2-7
Frame Relay Encapsulation 2-8
LAPB Encapsulation 2-8
X.25 Encapsulation 2-8
ATM-DXI Encapsulation 2-9
SMDS Encapsulation 2-9
Serial Cisco IOS Commands Generated 2-9
Asynchronous/Synchronous Serial Interface Configuration 2-9
Synchronous Configuration 2-9
Asynchronous Configuration 2-11
ISDN BRI Interface Configuration 2-12
ISDN BRI Line Configuration 2-15
ISDNBRI Provisioning by Switch Type 2-15
Defining ISDN Service Profile Identifiers 2-17
E1/T1 ISDN PRI Configuration 2-17
E1/T1 PRI Mode 2-17
E1 Channelized Mode 2-18
T1 Channelized Mode 2-20
1-Port, 4-Wire 56-kbps DSU/CSU Configuration Setup 2-22
Choosing Circuit-Switched or Dedicated-Line Service 2-22
Switched Mode 2-22
Dedicated Mode 2-23
Completing the Configuration 2-23