DET

AILED STEPS

Purpose

Command or Action

Enters

the

configuration

mode

for

a

Gigabit

Ethernet

W

AN

interface

on

the

router

.

interface

type

number

Example:

Router(config)#

interface

gigabitethernet

1

Step 1

Sets

the

IP

address

and

subnet

mask

for

the

specified

Gigabit

Ethernet

interface.

ip

addr

ess

ip-addr

ess

mask

Example:

Router(config-if)#

ip

address

192.168.12.2

255.255.255.0

Step 2

Enables

the

Ethernet

interface,

changing

its

state

from

administratively

down

to

administratively

up.

no

shutdown

Example:

Router(config-if)#

no

shutdown

Step 3

Exits

configuration

mode

for

the

Gigabit

Ethernet

interface

and

returns

to

global

configuration

mode.

exit

Example:

Router(config-if)#

exit

Step 4

Example:

Router(config)#

Configuring a V

.92 Modem Interface

The

Cisco

891

ISR

has

a

V

.92

modem

backup

interface.

T

o

configure

this

interface,

perform

these

steps,

beginning

in

global

configuration

mode:

SUMMAR

Y STEPS

1.

interface

type

number

2.

ip

addr

ess

ip-addr

ess

mask

3.

encapsulation

ppp

4.

dialer

in-band

5.

dialer

string

dial-string

6.

dialer-gr

oup

gr

oup-number

7.

async

mode

dedicated

8.

exit

Cisco 800 Series Integrated Services Routers Software Configuration Guide

26

OL-31704-02

Basic Router Configuration

Configuring W

AN Interfaces

DET

AILED STEPS

Purpose

Command or Action

Enters

the

configuration

mode

for

a

V

.92

W

AN

interface

(serial

interface)

on

the

router

.

interface

type

number

Example:

Step 1

Example:

Router(config)#

interface

async

1

Sets

the

IP

address

and

subnet

mask

for

the

specified

V

.92

interface.

ip

addr

ess

ip-addr

ess

mask

Example:

Step 2

Example:

Router(config-if)#

ip

address

192.168.12.2

255.255.255.0

Sets

the

encapsulation

method

to

point-to-point

protocol

(PPP)

for

the

serial

interface.

encapsulation

ppp

Example:

Step 3

Example:

Router(config-if)#

encapsulation

ppp

Specifies

that

dial-on-demand

routing

(DDR)

is

supported.

dialer

in-band

Example:

Step 4

Example:

Router(config-if)#

dialer

in-band

Specifies

the

string

(telephone

number)

to

be

used

when

placing

a

call

from

the

interface.

dialer

string

dial-string

Example:

Step 5

Example:

Router(config-if)#

dialer

string

102

Configures

the

interface

to

belong

to

a

specific

dialing

access

group.

dialer-gr

oup

gr

oup-number

Example:

Step 6

Cisco 800 Series Integrated Services Routers Software Configuration Guide

OL-31704-02

27

Basic Router Configuration

Configuring W

AN Interfaces

Purpose

Command or Action

Example:

Router(config-if)#

dialer-group

1

Places

the

line

into

dedicated

asynchronous

mode

using

Serial

Line

Internet

Protocol

(SLIP)

or

PPP

encapsulation.

async

mode

dedicated

Example:

Step 7

Example:

Router(config-if)#

async

mode

dedicated

Exits

configuration

mode

for

the

V

.92

interface

and

returns

to

global

configuration

mode.

exit

Example:

Step 8

Example:

Router(config-if)#

exit

Example:

Router(config)#