Glossary

C

card type

CDP

The type of the card inserted in a slot.

Cisco Discovery Protocol. CDP runs on all Cisco devices so that these devices can learn about neighboring devices and exchange information. CDP uses a well-known multicast MAC address. During system initialization, the application-specific integrated circuit (ASIC) is configured to forward these packets to the Cisco IOS XR software CPU, which processes the packets.

Cisco.com

CLI

The Cisco website

command-line interface. A text-based user interface to an operating system. A command-line interface is a user interface to a computer operating system or an application in which the user responds to a visual prompt by typing a command on a specified line, receives a response from the system, and then enters another command, and so forth. Typically, most of the UNIX-based systems today offer both a command-line interface and graphical user interface (GUI). See also GUI.

committed/saved

The configuration stored in the system for a particular node. The RP loads the committed configuration

software

into memory at startup.

configuration

 

configuration

In Cisco routers, a 16-bit, user-configurable value that determines how the router functions during

register

initialization. The configuration register can be stored in hardware or software. In hardware, the bit

 

position is set using a jumper. In software, the bit position is set by specifying a hexadecimal value

 

using configuration commands. A hexadecimal or decimal value that represents the 16-bit

 

configuration register value that you want to use the next time the router is restarted. The value range

 

is from 0x0 to 0xFFFF (0 to 65535 in decimal).

control plane

The control plane oversees the operation of the data plane, allocating resources, providing information,

 

and handling errors to allow data plane operations to be continuous and efficient.

CORBA

Common Object Request Broker Architecture. Specification that provides the standard interface

 

definition between OMG-compliant objects. CORBA allows applications to communicate with one

 

another no matter where they are located or who has designed them.

CoS

class of service. An indication of how an upper-layer protocol requires a lower-layer protocol to treat

 

its messages. In SNA subarea routing, CoS definitions are used by subarea nodes to determine the

 

optimal route to establish a given session. A CoS definition comprises a virtual route number and

 

transmission priority field. Repetitive, regularly timed signals are used to control synchronous

 

processes.

CWI

Craft Works Interface. Graphical user interface (GUI) used to configure and operate a router. The CWI

 

client runs in a web browser.

D

DDTS

distributed defect tracking system. A method to track software errors and resolutions.

DHCP

Dynamic Host Configuration Protocol. Provides a mechanism for allocating IP addresses dynamically

 

so that addresses can be reused when hosts no longer need them.

 

Cisco IOS XR Getting Started Guide

GL-2

OL-10957-02

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Cisco Systems Cisco IOS XR manual Into memory at startup, Is from 0x0 to 0xFFFF 0 to 65535 in decimal, Processes, GL-2