Command or Action Purpose, HC-122 | Cisco Systems XR 12000 SIP-401

Configuring Serial Interfaces on Cisco IOS XR Software

How to Configure Serial Interfaces

13.end or commit

14.show interfaces serial instance

	Command or Action		Purpose
Step 1
	configure		Enters global configuration mode.
	Example:
	RP/0/0/CPU0:router# configure
Step 2
	interface serial instance		Specifies the serial interface name and enters interface
			configuration mode. Naming notation for T3/E3 interfaces
	Example:		is rack/slot/module/port and for T1/E1/DS0 interfaces is
			rack/slot/module/port/t1-num:channel-group-number.
	RP/0/0/CPU0:router(config)# interface serial

	0/1/0/0/10:15
Step 3
	ipv4 address ip-address		Assigns an IP address and subnet mask to the interface.
	Example:
	RP/0/0/CPU0:router(config-if)# ipv4 address
	10.1.2.1	255.255.255.224
Step 4
	encapsulation [hdlc ppp]		(Optional) Configures the interface encapsulation
			parameters and details such as HDLC or PPP.
	Example:		Note	The default encapsulation is hdlc.
	RP/0/0/CPU0:router(config-if)# encapsulation
	hdlc
Step 5
	keepalive {seconds disable}		(Optional) Configures the HDLC keepalive value.
			Note	The default value for the keepalive timer is 10
	Example:			seconds.
	RP/0/R0/CPU0:router(config-if)# keepalive 10
Step 6
	serial		(Optional) Enters serial submode to configure the serial
			parameters.
	Example:
	RP/0/0/CPU0:router(config-if)# serial
	RP/0/0/CPU0:ios(config-if-serial)#
Step 7
	crc length		(Optional) Specifies the length of the cyclic redundancy
			check (CRC) on the interface.
	Example:		Note	The default is CRC length is 16.
	RP/0/0/CPU0:ios(config-if-serial)# crc 32
Step 8
	invert		(Optional) Inverts the data stream.
	Example:
	RP/0/0/CPU0:ios(config-if-serial)# inverts

Cisco IOS XR Interface and Hardware Component Configuration Guide

Command or Action