Cisco 10000 Series Configuration Manual page 357

Packet Over SONET. A high-speed means of transmitting data over a SONET fiber-optic transmission
POS
system through a direct fiber connection to a data switch or router. POS is a point-to-point dedicated
leased-line approach intended purely for high-speed data applications. POS allows a user organization
to pass data in its native format, without the addition of any significant level of overhead in the form
of signaling and control information.
Point-to-Point Protocol. Provides router-to-router and host-to-network connections over synchronous
PPP
and asynchronous circuits.
Performance routing engine. The central routing unit for the Cisco 10000 series ESR. The PRE
PRE
performs all Layer 2 and Layer 3 packet manipulation related to routing and forwarding through the
Cisco 10000 ESR. Dual PREs can be configured in a single chassis for redundancy.
Q
Quality of service. A measure of performance for a transmission system that reflects its transmission
QoS
quality and service availability.
See QPPB.
QoS Policy
Propagation on BGP
QoS Policy Propagation on BGP. A feature involving the classification of packets by IP precedence
QPPB
based on BGP community lists, BGP autonomous system paths, and access lists. After a packet is
classified, other quality of service features such as committed access rate (CAR) and weighted random
early detection (WRED) can specify and enforce policies to fit a business model.
See QoS.
Quality of Service
R
Random-access memory. Volatile memory that can be read and written by a microprocessor.
RAM
See RAM.
Random Access
Memory
In internetworking, the duplication of devices, services, or connections so that, in the event of a failure,
Redundancy
the redundant devices, services, or connections can perform the work of those that failed.
Remote Monitoring. MIB agent specification described in RFC 1271 that defines functions for the
RMON
remote monitoring of networked devices. The RMON specification provides numerous monitoring,
problem detection, and reporting capabilities.
Read only memory. Nonvolatile memory that can be read, but not written, by the microprocessor.
ROM
OL-8834-04
Cisco 10000 Series Router Line Card Configuration Guide
Glossary
GL-7