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

Glossary
GL-15
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
SCRP
shelf controller/Route Processor. See also SC.
SCTP
Stream Control Transmission Protocol. An alternative protocol to TCP. SCTP contains multiple
transmission paths and is designed to facilitate SS7 signaling over TCP/IP, supporting multiple IP
addresses from the same host and treating the data streams from these addresses as one session. It does
not require a strict order of delivery like TCP. If one data stream fails, the other streams are allowed to
continue.
SDH
Synchronous Digital Hierarchy. European standard that defines a set of rate and format standards that
are sent using optical signals over fiber. SDH is similar to SONET, with a basic SDH rate of
155.52 Mbps, designated at STM-1.
SDRAM
synchronous dynamic random access memory. A form of dynamic RAM that adds a separate clock
signal to the control signals.
shelf controller
See system controller.
shelf manager
The shelf manager process runs on a router or switch, doing platform-dependent functions, including
handling OIR events. Shelf manager is formerly called platform manager.
SM
switch module.
SMU
Software Maintenance Upgrade. A “point fix” for a critical problem. SMUs are delivered as PIE files
and are used to update software packages.
SNMP
Simple Network Management Protocol. SNMP is the protocol governing network management and the
monitoring of network devices and their functions. It is not necessarily limited to TCP/IP networks.
SNMPv3
Simple Network Management Protocol Version 3. An interoperable standards-based protocol for
network management. SNMPv3 provides secure access to devices by a combination of authenticating
and encrypting packets over the network.
snoop
A function of the fabric that copies all traffic entering the fabric from an interface to another interface.
software
configuration
A list of packages activated for a particular node. A software configuration consists of a boot package
and additional feature packages.
SONET
Synchronous Optical Network. A standard format for transporting a wide range of digital
telecommunications services over optical fiber. SONET is characterized by standard line rates, optical
interfaces, and signal formats. See also SDH.
SP
service processor. An SP on each card maintains an internal management connection to the shelf
controller for the rack. The SP is referred to in CLI commands to identify the nodeID for fabric, alarm
and fan controller cards.
Example:
RP/0/RPO/CPU:router# admin show controllers fabric connectivity location 0/SM0/SP
SPE
Synchronous Payload Envelope. Portion of the SONET frame containing overhead information (POH
and user data).
SPF
shortest path first. Routing algorithm that iterates on length of path to determine a shortest-path
spanning tree. Commonly used in link-state routing algorithms. Sometimes called Dijkstra's algorithm.

Cisco CRS-1 - Carrier Routing System Router Specifications

General

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