Cisco Systems XR 12000 SIP-401, XR 12000 SIP-501, XR 12000 SIP-601 User Manual

Configuring Serial Interfaces on Cisco IOS XR
Software

This module describes the serial interfaces on routers supporting Cisco IOS XR software. Before you
configure a serial interface, you must configure the clear channel T3/E3 controller or channelized
T1/E1controller (DS0 channel) that is associated with that interface.

Feature History for Configuring Serial Controller Interfaces

Release Modification

Release 3.3.0 This feature was introduced on the Cisco XR 12000 Series Router.

Support was added on the Cisco XR 12000 Series Router for the following
hardware:

• Cisco XR 12000 SIP-401

• Cisco XR 12000 SIP-501

• Cisco XR 12000 SIP-601

Support was added on the Cisco XR 12000 Series Router for the following
SPAs:

• 2-Port and 4-Port Channelized T3 Serial SPA

• 2-Port and 4-Port T3/E3 Serial SPA

Contents

• Prerequisites for Configuring Serial Interfaces, page HC-116

• Information About Serial Interfaces, page HC-116

• How to Configure Serial Interfaces, page HC-121

• Additional References, page HC-124

Cisco IOS XR Interface and Hardware Component Configuration Guide

HC-115

Configuring Serial Interfaces on Cisco IOSXR Software

Prerequisites for Configuring Serial Interfaces

Prerequisites for Configuring Serial Interfaces

Before configuring serial interfaces, be sure that the following tasks and conditions are met:

• You must be in a user group associated with a task group that includes th e proper task IDs for serial

Interface commands. Task IDs for commands are listed in Cisco IOS XR Interface and Hardware
Component Command Reference.

• Your hardware must support T3/E3 controllers and serial interfaces. The following hardware

supports T3/E3 controllers and serial inte rfaces in Cisco IOS XR Software Release 3.3:

–

2-Port and 4-Port Clear Channel T3/E3 SPAs

–

2-Port and 4-Port Channelized T3 SPAs

Note The 2-Port and 4-Port Channelized T3 SPAs support T1/E1 controllers and DS0 channels.

• You have already configured the clear channel T3/E3 controller or channelized

T3-to-T1/E1controller that is associated with the serial interface y ou want to conf igure, as described
in the Configuring Clear Channel T3/E3 Controllers and Channelized T3 Controllers on

Cisco IOS X R Software module earlier in this document.

Information About Serial Interfaces

Serial interfaces are supported on the following Cisco XR 12000 Series Router shared port adapter
(SPA) cards:

• 2-Port and 4-Port Clear Channel T3/E3 SPAs

• 2-Port and 4-Port Channelized T3 SPAs

Note The 2-Port and 4-Port Channelized T3 SPAs can run in clear channel mode, or they can be

channelized into 28 T1 or 21 E1 controllers.

T3/E3 serial interfaces are automatically created on clear channel T3/E3 controllers. On channelized
T3-to-T1/E1 controllers, serial interfaces are automatically created when users conf igure indi vidual DS0
channel groups the T1/E1 controll ers.

To configure serial interfaces, you must understand the following concepts:

• High Level Over-View: Serial Interface Configuration on Clear-Channel SPAs, page HC-117

• High Level Over-View: Serial Interface Configuration on Channelized SPAs, page HC-118

• Default Settings for Serial Interface Configurations, page HC-119

• Serial Interface Naming Notation, page HC-119

• Cisco IOS XR PPP Encapsulation, page HC-120

• Cisco IOS XR HDLC Encapsulation, page HC-120

• Keepalive Timer, page HC-120

HC-116

Cisco IOS XR Interface and Hardware Component Configuration Guide

Configuring Serial Interfaces on Cisco IOS XR Software

Information About Serial Interfaces

High Level Over-View: Serial Interface Configuration on Clear-Channel SPAs

Table 10 provides a high-level overview of the tasks required to configure a T3 serial interface on a

2-Port and 4-Port Clear Channel T3/E3 SPA.

Table 10 Overview: Configuring a T3 Serial Interface on a Clear Channel SPA

Step Task Module Section

1. Use the hw-module subslot
command to set serial mode for the
SPA to be T 3, if necessary.

Note By default, the 2-Port and

“Configuring Clear Channel T3/E3
Controllers and Channelized T3
Controllers on Cisco IOS XR
Software”

4-Port Clear Channel
T3/E3 SPA is set to run in
T3 mode.

2. Configure the T3 controller “Configuring Clear Channel T3/E3

Controllers and Channelized T3
Controllers on Cisco IOS XR
Software”

3. Configure the serial interface that is
associated with the T3 controller

“Configuring Serial Interfaces on
Cisco IOS XR Software”

you configured in Step 2.

“Setting the Card Type for the Clear
Channel SPAs”

“Setting the Card Type for the Clear
Channel SPAs”

“Configuring the Serial Interfaces”

Table 11 provides a high-level overview of the tasks required to configure an E3 serial interface on a

2-Port and 4-Port Clear Channel T3/E3 SPA.

Table 11 Overview: Configuring an E3 Serial Interface on a Clear Channel SPA

Step Task Module Section

1. Use the hw-module subslot
command to set serial mode for the
SPA to be E 3.

2. Configure the E3 controller Configuring Clear Channel T3/E3

Configuring Clear Channel T3/E3
Controllers and Channelized T3
Controllers on Cisco IOS XR Software

Controllers and Channelized T3

Setting the Card Type for the Clear
Channel SPAs

Setting the Card Type for the Clear
Channel SPAs

Controllers on Cisco IOS XR Software

3. Configure the serial interface that is
associated with the E3 controller

Configuring Serial Interfaces on
Cisco IOS XR Software

Configuring the Serial Interfaces

you configured in Step 2.

Cisco IOS XR Interface and Hardware Component Configuration Guid e

HC-117

Configuring Serial Interfaces on Cisco IOS XR Software

Information About Serial Interfaces

High Level Over-View: Serial Interface Configuration on Channelized SPAs

Table 12 provides a high-level overview of the tasks required to configure a T1 serial interface on the

2-Port and 4-Port Channelized T3 SPA.

Table 12 Overview: Configuring a Serial Interface on a T1 DS0 Channel

Step Task Module Section

1. Configure the T3 controller

parameters and set the SP A mode to
be T3.

28 T1 controllers are automat ically
created.

2. Create and configure DS0 channel

groups on the T1 controllers you
created in Step 1.

3. Configure the Serial interfaces that

are associated channel groups you
created in Step 2.

“Configuring Clear Channel
T3/E3 Controllers and
Channelized T3 Controllers on
Cisco IOS XR Software”

“Configuring Clear Channel
T3/E3 Controllers and
Channelized T3 Controllers on
Cisco IOS XR Software”

“Configuring Serial Interfaces on
Cisco IOS XR Software”

“Configuring a Channelized T3-to-T1
Controller”

“Configuring a Channelized T3-to-T1
Controller”

“Configuring the Serial Interfaces”

Table 13 provides a high-level overview of the tasks required to configure an E1 serial interface on the

2-Port and 4-Port Channelized T3 SPA.

Table 13 Overview: Configuring a Serial Interface on an E1 DS0 Channel

Step Task Module Section

1. Configure the T3 controller

parameters and set the SP A mode to
be E3.

21 E1 controllers are automat ically

Configuring Clear Channel T3/E3
Controllers and Channelized T3
Controllers on Cisco IOS XR
Software

Configuring a Channelized T3-to-T1
Controller

created.

2. Create and configure DS0 channel

groups on the E1 controllers you
created in Step 1.

Configuring Clear Channel T3/E3
Controllers and Channelized T3
Controllers on Cisco IOS XR

Configuring a Channelized T3-to-E1
Controller

Software

3. Configure the Serial interfaces that

are associated channel groups you

Configuring Serial Interfaces on
Cisco IOS XR Software

Configuring the Serial Interfaces

created in Step 2.

HC-118

Cisco IOS XR Interface and Hardware Component Configuration Guide