Cisco Systems Cisco IOS XR manual Selecting and Identifying the Designated Shelf Controller

Chapter 1 Introduction to Cisco IOS XR Software

Selecting and Identifying the Designated Shelf Controller

sends the response to the client in the form of encoded XML API tags. The XML API supports readily available transport layers, including Telnet, Secure Shell (SSH), and Common Object Request Broker Architecture (CORBA). The Secure Socket Layer (SSL) transport is also supported by the XML API.

For more information, see the Cisco IOS XR software documents listed in the “Related Documents” section on page x.

Simple Network Management Protocol

Simple Network Management Protocol (SNMP) is an application-layer protocol designed to facilitate the exchange of management information between network devices. By using SNMP-transported data (such as packets per second and network error rates), network administrators can more easily manage network performance, find and solve network problems, and plan for network growth.

The Cisco IOS XR software supports SNMP v1, v2c, and v3. SNMP is part of a larger architecture called the Internet Network Management Framework (NMF), which is defined in Internet documents called RFCs. The SNMPv1 NMF is defined by RFCs 1155, 1157, and 1212, and the SNMPv2 NMF is defined by RFCs 1441 through 1452.

SNMP is a popular protocol for managing diverse commercial internetworks and those used in universities and research organizations. SNMP-related standardization activity continues even as vendors develop and release state-of-the-art, SNMP-based management applications. SNMP is a relatively simple protocol, yet its feature set is sufficiently powerful to handle the difficult problems presented in trying to manage the heterogeneous networks of today.

For more information, see the Cisco IOS XR software documents listed in the “Related Documents” section on page x.

Selecting and Identifying the Designated Shelf Controller

The designated shelf controller (DSC) controls a standalone router or a multishelf System. A DSC is a role that is assigned to one route processor (RP) card or performance route processor (PRP) card in each router or multishelf system. RP cards operate in Cisco CRS-1 routers, and PRP cards operate in Cisco XR 12000 and 12000 Series routers.

Note Throughout this guide, the term RP is used to refer to the RP cards supported on Cisco CRS-1 routers and the PRP cards supported on Cisco XR 12000 Series Routers. If a feature or an issue applies to only one platform, the accompanying text specifies the platform.

Although each router or multishelf system can have multiple RP cards, only one can serve as the DSC and control the router or multishelf system. The DSC provides system-wide administrative functions, including:

•User configuration using a terminal connection or network connection

•Distribution of software to each node in the router or system

•Coordination of software versioning and configurations for all nodes in the router or system

•Hardware inventory and environmental monitoring

The first step in setting up a new router is to select or identify the DSC because the initial router configuration takes place through the DSC. The following sections describe how to select and identify the DSC on different routers and the multishelf system:

Cisco IOS XR Getting Started Guide

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