Cisco Systems OL-11291-01 manual IPM-related functions, See SRB, GL-7

RTR

RTT

RTTMON MIB

RU

Glossary

See SA Agent.

round-trip time. Time required for a network packet to travel from the source to the destination and back. RTT includes the time required for the destination to process the message from the source and generate a reply. The latency measurements taken by IPM and SA Agent are round-trip time latency measurements.

round-trip time monitor management information base. Proprietary MIB created by Cisco to obtain and store round-trip time statistics. The MIB is implemented by the Cisco IOS software in the source router. The IPM application obtains the round-trip time statistics from this MIB. You can access additional information about this MIB, on the Internet at ftp://ftp.cisco.com/pub/mibs/v2/CISCO-RTTMON-MIB.my. This MIB has been extended to monitor network performance statistics in addition to round-trip time statistics.

request/response unit. Request and response messages exchanged between NAUs in an SNA network.

S

SA Agent

SA Agent Responder

Service Assurance Agent. Feature of Cisco IOS software which allows you to measure and monitor network performance between a Cisco router and a remote device.

Component embedded in a target Cisco router running version 12.1 or later of the Cisco IOS software. Its function is to respond to SA Agent request packets from a source router running the SA Agent software. The Responder can listen on any user-defined port for UDP and TCP protocols. The SA Agent Responder is required only for specific collector types, such as Enhanced UDP for monitoring jitter in Voice-over-IP networks.

server

Service Assurance Agent

Simple Network Management Protocol

SNA

Node or software program that provides services to clients. See also client.

See SA Agent.

See SNMP.

Systems Network Architecture. Large, complex, feature-rich network architecture developed in the 1970s by IBM. Similar in some respects to the OSI reference model, but with several differences. Essentially, SNA is composed of seven layers.

SNMP		Simple Network Management Protocol. Network management protocol used almost exclusively in
		TCP/IP networks. SNMP provides a means to monitor and control network devices, and to manage
		configurations, statistics collection, performance, and security.
SNMP agent		Simple Network Management Protocol agent. Resides in the source router and is provided as part of
		Cisco IOS software. The SNMP agent receives requests from the IPM SNMP server to perform all
		IPM-related functions.
source		Originating router from which IPM takes network performance measurements.
source-route bridging		See SRB.
		User Guide for Internetwork Performance Monitor
	OL-11291-01		GL-7