Software Configuration Guide for the Cisco ISR 4400 Series
Overview
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Table of Contents

Overview

Introduction

Sections in this Document

Processes

Overview

Introduction

The Cisco ISR 4451-X is a modular router with LAN and WAN connections that can be configured by means of interface modules, including Cisco Enhanced Service Modules (SM-Xs), and Network Interface Modules (NIMs). NIM slots also support removable storage for hosted applications.

The following features are provided for enterprise and service provider applications:

  • Enterprise Applications

High-end branch gateway

Regional site aggregation

Key server or PfR master controller

Device consolidation or “Rack in a Box”

  • Service Provider Applications

High-end managed services in Customer-Premises Equipment (CPE)

Services consolidation platform

Route reflector or shadow router

Flexible customer edge router

The router runs Cisco IOS XE software, and uses software components in many separate processes. This modular architecture increases network resiliency, compared to standard Cisco IOS software.

Sections in this Document

The following sections are less important for the initial setup, and contain information on handling physical slots on the router, processes that monitor the router’s health, system error messages, trace logs, and environmental monitoring:

Commands

Cisco IOS XE commands are identical in look, feel, and usage to Cisco IOS commands on most platforms. To find reference information for a specific Cisco IOS XE command, see the Cisco IOS Master Command List, All Releases .

Features

The router runs Cisco IOS XE software which is used on multiple platforms. For further information on the many available software features, see the configuration guides on the Cisco IOS XE 3S Software Documentation page. In addition to the features in the Cisco IOS XE 3S Configuration Guides there also a few separate configuration guides for: No Service Password Recovery, Multilink PPP Support, and Network Synchronization—see the Cisco ISR 4400 Series Configuration Guides .

To verify support for specific features, use the Cisco Feature Navigator tool. For more information, see the “Using Cisco Feature Navigator” section.

Processes

The list of background processes in Table 1-1 may be useful for checking router state and troubleshooting. However, you do not need to understand these processes to understand most router operations.

 

Table 1-1 Individual Processes

Process
Purpose
Affected FRUs
Sub Package Mapping

Chassis Manager

Controls chassis management functions, including management of the High Availability (HA) state, environmental monitoring, and FRU state control.

RP
ESP

RPControl

SIPBase

ESPBase

Host Manager

Provides an interface between the IOS process and many of the information gathering functions of the underlying platform kernel and operating system.

RP
ESP

RPControl

SIPBase

ESPBase

Logger

Provides IOS logging services to processes running on each FRU.

RP
ESP

RPControl

SIPBase

ESPBase

IOS

Implements all forwarding and routing features for the router.

RP

RPIOS

Forwarding Manager

Manages downloading of configuration details to each of the ESPs and the communication of forwarding plane information, such as statistics, to the IOS process.

RP
ESP

RPControl


ESPBase

Pluggable Services

Provide integration between platform policy applications, such as authentication and the IOS process.

RP

RPControl

Shell Manager

Provides user interface (UI) features relating to non-IOS components of the consolidated package. These features are also available for use in diagnostic mode when the IOS process fails.

RP

RPControl

IO Module process

Exchanges configuration and other control messages with a NIM, or Enhanced Service Module (SM-X).

IO Modules

SIPSPA

CPP driver process

Manages CPP hardware forwarding engine on the ESP.

ESP

ESPBase

CPP HA process

Manages HA state for the CPP hardware forwarding engine.

ESP

ESPBase

CPP SP process

Performs high-latency tasks for the CPP-facing functionality in the ESP instance of the Forwarding Manager process.

ESP

ESPBase

For further details of router capabilities and models, see the Hardware Installation Guide for the Cisco 4400 Series Integrated Services Routers .