Cisco CRS-1 - Carrier Routing System Router Getting Started Guide

Glossary
GL-13
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
RCP
remote copy protocol. A protocol that allows users to copy files to and from a file system residing on
a remote host or server on the network. The RCP protocol uses TCP to ensure the reliable delivery of
data.
RIB
Routing Information Base. This is the set of all available routes to choose the FIB from. The RIB
essentially contains all routes available for selection. Essentially it is the sum of all routes learned via
dynamic routing protocols, all directly attached networks (that is. networks that a given router has
interfaces connected to), and any additional configured routes such as static routes.
RIP
Routing Information Protocol. A simple routing protocol that is part of the TCP/IP protocol suite and
the most common IGP in the Internet. RIP determines a route based on the smallest hop count between
source and destination. It is a distance vector protocol that broadcasts routing information to
neighboring routers. It is known to use excessive bandwidth. See also hop count and IGP.
rlogin
remote monitoring. Used to log in to a UNIX host.
ROMMON
ROM monitor program. ROMMON is executed from ROM and is a single threaded program that
initializes a board and loads a higher level operating system. ROMMON is for debugging or to
manually boot the system.
router
Network layer device that uses one or more routing metrics to determine the optimal path along which
network traffic should be forwarded. Routers forward packets from one network to another based on
network layer information.
routing
Process of finding a path to a destination host. Routing is very complex in large networks because of
the many potential intermediate destinations a packet might traverse before reaching its destination
host.
routing domain
Group of end systems and intermediate systems operating under the same set of administrative rules.
Within each routing domain is one or more areas, each uniquely identified by an area address.
routing metric
A routing algorithm determines that one route is better than another. This information is stored in
routing tables. Metrics include bandwidth, communication cost, delay, hop count, load, MTU, path
cost, and reliability. Sometimes referred to simply as a metric. See also algorithm.
routing protocol
Protocol that accomplishes routing through the implementation of a specific routing algorithm.
Examples of routing protocols include BGP, OSPF, and IS-IS.
routing table
Table stored in a router or some other internetworking device that keeps track of routes to particular
network destinations and, in some cases, metrics associated with those routes.
RP
1. Route Processor. Cards that contain run control software on the Cisco CRS-1 Series routing system.
Two RPs are installed as a redundant pair in dedicated slots in the front of each line card chassis. See
also distributed Route Processor (DRP).
2. A rendezvous point (RP) is a single common root placed at a chosen point of a shared distribution
tree. When Protocol Independent Multicast (PIM) is configured in sparse mode, you must choose one
or more routers to operate as an RP. See also PIM, PIM-SM, and PIM-SSM.

Cisco CRS-1 - Carrier Routing System Router Specifications

General

Brand	Cisco
Model	CRS-1 - Carrier Routing System Router
Category	Network Router
Language	English