Cisco Systems Cisco IOS XR manual Cisco Technical Assistance Center, GL-11

Glossary

SNMP

SNMPv3

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.

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.

software	A list of packages activated for a particular node. A software configuration consists of a boot package
configuration	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.
SSH	Secure Shell. A protocol that provides a secure remote connection to a router through a Transmission
	Control Protocol (TCP) application.
SSL	secure socket layer. A secure socket between two entities with authentication.
standby	Denotes an inactive card or process that waits to become active; standby cards or processes are also
	sometimes denoted as backup.
startup	The router configuration designated to be applied on the next router startup.
configuration
subinterface	Virtual interfaces created on a hardware interface. These software-defined interfaces allow for
	segregation of traffic into separate logical channels on a single hardware interface and better utilization
	of the available bandwidth on the physical interface.

switchover

system reload

system restart

A switch between the active and standby cards. The switchover can be initiated by command, or it can occur automatically when the active card fails.

Reload of a router node.

Soft reset of a router node. This involves restarting all processes running on that node.

T

TAC		Cisco Technical Assistance Center.
		Cisco IOS XR Getting Started Guide
	OL-10957-02		GL-11