AndmesideIRT 0030

loeng 7 19. okt. 2005

Avo Ots

telekommunikatsiooni õppetoolraadio- ja sidetehnika instituut

avots@lr.ttu.ee

Üldine võrgu infrastruktuurInternet

Teenuse-pakkujate

võrgud

Regionaalnetuumik-

võrk Kliendikodu-

võrgud

Juurde-pääsu-võrk

SideTeenuse kvaliteet (Q-o-S)

• Kättesaadav

• Vastuvõetava suurusega viide • Privaatne• Ainukordne/mitmene

• Hallatav

VõrguhaldusConfiguration Management - inventory, configuration, provisioning

Fault Management - reactive and proactive network fault management

Performance Management - # of packets dropped, timeouts, collisions, CRC errors

Security Management - SNMP doesn’t provide much here

Accounting Management - cost management and chargeback assessment

Asset Management - statistics of equipment, facility, and administration personnel

Planning Management - analysis of trends to help justify a network upgrade or bandwidth increase

Service Level Agreement (SLA)

Legal relationship with the Network Service Provider

• Clear expectations

• Measurable

• Redress

12 TTFTD

• T1– Time in milliseconds when a frame left the source

• T2– Time in milliseconds when a frame arrived at the

destination

Service Level Definitions

Frame Transfer Delay

SLA Verification Techniques

R

WAN Access

WAN CloudSwitch Switch

LANCPE

LANCPE

CLIENTSERVER

NIU NIU

Traditional service scope

What is Quality of Service?(QoS)

• Definition:– Requirements for service delivery quality

• Includes:– Bandwidth– Burst capability– Loss tolerance– Delay

Q-o-s

QoSPoliitika

QoS

Paketikäsitlus

Järjekord

QoS

QoS “end to end”

What is Class of Service? (CoS)

• Assign a connection to a group of similar connections

• Forward frames with priority based on the group

POLICE

Mida nõuda võrgult...

Töökindel,avardatav,paljutarbeline

Eluiga

Main-frame

CablingSoftware

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Years

LAN

Work-station

Kes pakuvad lahendusi•http://www.hp.com/go/openview/ HP OpenView

•http://www.tivoli.com/ IBM NetView

•http://www.novell.com/products/managewise/ Novell ManageWise

•http://www.sun.com/solstice/ Sun MicroSystems Solstice

•http://www.microsoft.com/smsmgmt/ Microsoft SMS Server

•http://www.compaq.com/products/servers/management/ Compaq Insight Manger

•http://www.redpt.com/ SnmpQL - ODBC Compliant

•http://www.empiretech.com/ Empire Technologies

•ftp://ftp.cinco.com/users/cinco/demo/ Cinco Networks NetXray

•http://www.netinst.com/html/snmp.html SNMP Collector (Win9X/NT)

•http://www.netinst.com/html/Observer.html Observer

•http://www.gordian.com/products_technologies/snmp.html Gordian’s SNMP Agent

•http://www.castlerock.com/ Castle Rock Computing

•http://www.adventnet.com/ Advent Network Management

•http://www.smplsft.com/ SimpleAgent, SimpleTester

Lõpulingid (loeng 8)• http://www.wtcs.org/snmp4tpc/FILES/

Reference/Francois/snmp.ppt

• http://www2.rad.com/networks/1998/snmp/overview.html

• http://www.tmdd.org/NEMATestingSummit/6-Testing-Tools-Session/ SimpleSoft/SNMPTools-NTCIP.ppt

• http://www.netlab.hut.fi/opetus/s38151/Luentomatsku/snmp.ppt