Cisco XR 12000 Series Getting Started Guide

GL-150
Cisco IOS XR Getting Started Guide for the Cisco XR 12000 Series Router
OL-24755-01
Chapter
P
package
A group of software components installed on the router.
packet
Logical grouping of information that includes a header containing control information and (usually)
user data. Packets most often are used to refer to network layer units of data.
Packet over
SONET/SDH
POS. Packet over SONET/SDH enables core routers to send native IP packets directly over SONET or
SDH frames.
PAP
Password Authentication Protocol. Authentication protocol that allows PPP peers to authenticate one
another. The remote router attempting to connect to the local router is required to send an authentication
request. Unlike Challenge Handshake Authentication Protocol (CHAP), PAP passes the password and
the hostname or username in the clear (unencrypted). PAP does not itself prevent unauthorized access
but merely identifies the remote end. The router or access server then determines whether that user is
allowed access. PAP is supported only on PPP lines. See also PPP.
PCMCIA
Personal Computer Memory Card International Association. Standard for credit card-size memory or
I/O device.
PIE
package installation envelope. An installable software file with the suffix pie. A PIE may be a package
or a Software Maintenance Upgrade (SMU). A PIE is used to deliver Cisco IOS XR software. A PIE
may contain a single component, group of components (called a package), or set of packages. When a
PIE contains more than one component, it is called a “Composite PIE.”
PLIM
Physical layer interface module. Provides the physical interface for a line card. Also handles
media-specific functions, such as framing, clock recovery, channelization, and optical signaling for line
interfaces connecting to a Cisco CRS router.
PM
performance monitoring. Provides a variety of automatic functions to aid in the maintenance and
operation of the network. PM is continuous, in-service monitoring of transmission quality that uses
software-provisionable performance parameters. Performance parameters are measured for all four
layers of the SONET signal: physical, section, line, and STS path.
POS
Packet over SONET/SDH. POS enables core routers to send native IP packets directly over
Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) frames.
PPP
Point-to-Point Protocol. Successor to SLIP that provides router-to-router and host-to-network
connections over synchronous and asynchronous circuits. Whereas SLIP was designed to work with IP,
PPP was designed to work with several network layer protocols, such as IP, IPX, and ARA. PPP also
has built-in security mechanisms, such as CHAP and PAP. PPP relies on two protocols: LCP and NCP.
primary RP
The first route processor configured for DSC or logical router operation. If a second RP is configured
as a redundant RP, it becomes the secondary RP.
Q
QoS
quality of service. A set of parameters that describes a flow of data, such as guaranteed bandwidth,
delay, and delivery guarantee.

Cisco XR 12000 Series Specifications

General

Brand	Cisco
Model	XR 12000 Series
Category	Network Router
Language	English