management of converging networks · why network management? ... tmn - telecommunications...
TRANSCRIPT
Greater ChicagoChapter
Thursday, 9-21-00
Management ofManagement ofConverging NetworksConverging Networks
Paul T. Schauer, PELucent Technologies
2
Agenda
✰ Converging Networks
✰ Why Network Management?
✰ What Is Network Management?
✰ Network Management for CATV
3
Converging Networks
SwitchedTelecomDomain
DataNetworking
Domain
Video Domain
ASPs
MSOs
4
Converging Networks
Video -Analog and
Digital
High SpeedOnline
Telephony -Primary andSecondary
IP Telephony
LAN / WAN
5
Why Network Management?
New Service Demands on HFC Networks :
▲ Transmission quality▲ Effective bandwidth▲ Service reliability (the probability that a
system will survive without interruptionfor a defined period)
▲ Outage Rate (the average rate at whichservice interruptions occur)
▲ Availability (the percentage of time thatservice is available)
6
Telephone Industry ! Availability objective 99.99% (53 min / yr).! Applies to network between local switch and
network interface.! Excludes local switch, customer premise equipment,
in-home wiring and loss of primary and backup power.! Clock starts when outage reported, not when it begins.
CATV Industry ! Availability objective 99.7% (26.3 hr / yr).! 2 outages within 3 months for single customer.! CableLabs “goal” based on outages exceeding these
rates becoming a major factor in customersperception of service quality.
! “Outage” is 2 or more customers losing 1 or morechannels. “Loss” is interruption not degradation.
! Includes power outages!
Why Network Management?
Different industries use different measures of service integrity:
7
Why Network Management?
0
10
20
30
40
50
60
TA S O 1958 C B S , NA S A1983
C ab leLab s1991
Pe rc e p tib le /A n n o y in g
Pe rc e p tib le /S lig h tlyA n n o y in gPe rc e p tib le /No tA n n o y in gIm p e rc e p tib le
C/N(dB)
Customer Expectations are continually increasing
8
Why Network Management?
Causes of CATV Service Interruptions
Signal Quality
CommercialPower Problems
Equipment Failures
Interfering Signals
Network Capacity
Customer Misuse
9
Why Network Management?
Causes of Service Interruptions … Equipment Failures*
⇒ Power Supplies 3%⇒ Amplifiers .15% to 10%
⇒ Optical Transmitters 2.3%
⇒ Optical Receivers .7% to 1.7%
⇒ Passive Devices .07% to 1%⇒ Coaxial Connectors .01% to .25%⇒ Fiber Optic Cable .3% to 3%⇒ Coaxial Cable .23% to 3%
⇒ Customer Premises 7%
⇒ Network Interfaces 5.4%
⇒ Headend Equipment 5% to 30%
* Regional differences such as lightning strikes and underground construction laws have major effect on outages. Sources: Network Reliability Council, Werner & Gatseos, Merk and Strode, Hamilton-Piercy and Balsdon, Bellcore.
OE
26
32
HE
NID
Modem
Set-top
10
Why Network Management?
Weapons against Service Interruptions ... Equipment Failures
♠ Start with high quality, reliable equipment.
♠ Network Architecture minimizing number of HPaffected by single point of failure.
♠ Redundant hardware / spares.
♠ Fiber Optic transport … self healing rings.
♠ Monitoring equipment to isolate failure,decreasing repair time.
NetworkManagement!
11
What Is Network Management?
TMN
FCAPS
SNMP
HMS
12
What Is Network Management?
ManagedNetworks
Network Management
Element Management
ServiceManagement
Business Mgmt
ManagedServices
ManagedApplications
Network Elements
TMN - Telecommunications Management Network (ITU Recommendation M.3010)
13
What Is Network Management?
FCAPS - 5 major functional areas defined by ISO,worldwide standard.
FF Fault Management
CC Configuration Management
AA Accounting Management
PP Performance Management
SS Security Management
14
What Is Network Management?
FCAPS Model
FaultManagement
ConfigurationManagement
AccountingManagement
PerformanceManagement
SecurityManagement
AlarmSurveillance
FaultCorrelation
TroubleAdmin
Testing
Planning
Engineering
Installation
Provisioning
Control
UsageMeasure
Pricing /Tariffs
CustomerAccounts
Monitoring
Analysis
Reporting
QualityAssurance
Prevention
Detection
Containment
Recovery
15
What Is Network Management?
SNMP - Simple Network Management ProtocolITU RFC 1155 / 1157 / 1448
SNMP Model of a managed network consists of four components:
➨ Management Station - manager controls number of nodes on a network,each equipped with a management agent.
➨ Management Agent - communications intelligence.
➨ Management Information Base (MIB) - collection of information or objectsabout the node where agent resides. Messages from manager to agent results in reading or configuring an object in the MIB.
➨ Network management protocol - manager and agent communicate through anetwork management protocol, enabling the manager to access objects in the agent’s MIBs. In TCP/IP networks, SNMP is an application level protocol using UDP as its underlying transport.)
16
What Is Network Management?
The data message containing the SNMP operation iscalled the Protocol Data Unit (PDU).
SNMP - Three basic sets of messages
“GET”
“SET”
“TRAP”
Retrieves the value of an object from an agentMIB (sent by manager).
Configures the value of an object in an agentMIB (sent by manager).
Enables the agent to alert a manger of anevent (sent by agent).
17
What Is Network Management?
✻ SCTE Standards Department subcommittee (1 of 7).✻ Official standards body for ANSI in North America.✻ Developing Network Management Interface standards
for the CATV industry in North America.✻ Chairman is Esteban Sandino (AT&T Broadband).✻ All work is SNMP based.✻ PHY layer - MAC layer - MIBs - Traps - Alarm handling.✻ Participants are vendors and CATV operators.
HMS - Hybrid ManagementSubcommittee
18
Inter-DomainFault
Management
Network Management For CATV
Electronic Gateways
Call Agents
Policy Server
DHCP/ DNS
Server
Call AgentEMS
Optical EMS
CDR Collection
Billing Platform
TNAdmin
Order Entry Trouble Reporting
OrderManagement
Trouble Management
NetworkInventorySystem
CustomerRecordsDatabase
CableConfig
Manager
CircuitConfig
Dispatch/WorkForceMgmt
OpticalConfigMgmt
RegistrationServer (Web)
IVR System(Voice)
Circuit Switches
ChurnManagement
Billing Inquiries(Web Based)
IDCM
CSR
OneLink
7R/E
CircuitFM
ATM EMS
ATMSwitches
Futu
re D
evel
opm
ent
DB
DB
OpticalFaultMgmt
CMTS / NIU EMS
Optical Network ElementsCable Network Elements
CableFault
Manager
DB
19
Inter-DomainFault
Management
Network Management For CATV
Electronic Gateways
Call Agents
Policy Server
DHCP/ DNS
Server
Call AgentEMS
Optical EMS
CDR Collection
Billing Platform
TNAdmin
Order Entry Trouble Reporting
OrderManagement
Trouble Management
NetworkInventorySystem
CustomerRecordsDatabase
CableConfig
Manager
CircuitConfig
Dispatch/WorkForceMgmt
OpticalConfigMgmt
RegistrationServer (Web)
IVR System(Voice)
Circuit Switches
ChurnManagement
Billing Inquiries(Web Based)
IDCM
CSR
OneLink
7R/E
CircuitFM
ATM EMS
ATMSwitches
Futu
re D
evel
opm
ent
DB
DB
OpticalFaultMgmt
CMTS / NIU EMS
Optical Network ElementsCable Network Elements
CableFault
Manager
DB
Focus on -✔ Fault Management✔ Performance Mgmt
20
Network Management For CATV
OE
26
32
NID
PS
WW
OE
OE
DistributionHub(s)
FiberTransport &Distribution
High SpeedData CMTS
ChannelInsertion
TelephonyTermination
Opt
ical
Tra
nspo
rt
VideoChannel
Equipmentand Ad
Insertion
TelephonySwitch /Trunks
High SpeedData
Routers,Servers,
and CMTS
Telephonyover
Internet(Pathstar /
7RE)
Headend
Facility, Powering, and Environment
HFC Plant andEnd-userTerminals
EM
EM
EM
EM
EM
EM
EM
EM
Modem
Set-top
VoIP
Cab
le F
ault
Man
agem
ent
Syst
em
21
Inter-Domain ManagementSeparates Services from Networks
Business Management
Service Management
Element Management
Standard Interface (HMS)
Network Management:Inter - Domain
Network Management:Domain Specific
Multi-Vendor Support
Inter - Domain Management:• High-speed Data• Switched Access• Video Entertainment• Transport• Control Systems
Standard Interface (SNMP)
Network Elements Support NewNetwork Elements
Network Management For CATV
22
Network Management For CATV
Difficulties for CATV companies toinitiate Inter-Domain Management …
New technologies and platforms.
High capital cost for equipment andhardened facility.
Technical staff with unique skill sets,difficult to find, and expensive to hire.
23
Network Management For CATV
Network Manager Layer:• Fault Manager• Performance Manager
ElementManager Layer
Element Layer
Fault Manager PerformanceManager
TroubleTicketingSystem
DatabaseTerminalServers
ClientManagement
Stations
ElementManagers (n)
Leased Data Circuits
Elements (n)
BroadbandNOC
Local Networks
ElementManager (1)
Element 1
Element 1
Element 1
ElementManager (2)
Element 2
Element 2
Element 2
24
Network Management For CATV
Let’s bring this all together -
✔ Deploy Fault Management andPerformance Management (initially).
✔ Interface existing ElementManagers and new IDFM.
✔ Consider deployment costs …Remote Network ManagementServices?
Thank You!