Specifications

Serial Interface Configuration Examples

IC-128

Cisco IOS Interface Configuration Guide

E1-G.703/G.704 Serial Port Adapter Example

The following example shows a conﬁguration for serial interface 9/1/3 on a E1-G.703/G.704 serial

port adapter in a Cisco 7500 series router. In this example, the interface is conﬁgured for framed

(G.704) operation, and timeslot 16 is used for data.

Router# configure terminal

Router(config)# interface serial 9/1/3

Router(config-if)# ip address 1.1.1.10 255.255.255.0

Router(config-if)# no keepalive

Router(config-if)# no fair-queue

Router(config-if)# timeslot 1-31

Router(config-if)# crc4

Router(config-if)# ts16

Router(config-if)# exit

Router(config)# exit

Router#

Low-Speed Serial Interface Examples

The following conﬁguration examples are provided for low-speed serial interfaces:

• Set Synchronous or Asynchronous Mode Examples

• Change between Controlled-Carrier and Constant-Carrier Modes Examples

• Tune Half-Duplex Timers Example

• Cisco 4000 Series Router with 2T16S Serial Network Processor Example

Set Synchronous or Asynchronous Mode Examples

The following example shows how to change a low-speed serial interface from synchronous to

asynchronous mode:

interface serial 2

physical-layer async

The following examples show how to change a low-speed serial interface from asynchronous mode

back to its default synchronous mode:

interface serial 2

physical-layer sync

interface serial 2

no physical-layer

The following example shows some typical asynchronous interface conﬁguration commands:

interface serial 2

physical-layer async

ip address 1.0.0.2 255.0.0.0

async default ip address 1.0.0.1

async mode dedicated

async default routing