A%20Broadband%20Network%20Management%20Practice:%20KT%20Internet

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A Broadband Network Management Practice KT
Internet

• 2006.9.28
• Jinhyoun Youn (jyoun_at_kt.co.kr)
• KT Network Strategic Group/
• Internet Department

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Contents

• Brief History of KT Internet Service and NMS
• KT Internet Management Systems Experiences
• NeOSS-IP Core NMS
• Performance Measurements
• Traffic Analysis
• Routing Information Management
• New Features for Premium Networks
• Future Directions

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Brief History of KT Internet Service
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Brief History of KT Internet NMSs

• At the initial stage(1996), primitive monitoring
  and fault management functions based on the
  production systems like Openview or CiscoWorks
  were the main usage of Internet NMS
• As the network grew, in-house software were much
  more preferred and KOSMOS(Kornet Service
  Managements and Operation Support systems,1996)
  was the first integrated style Internet NMS for
  KT. Simple monitoring functions were expanded to
  reacheability and availability management
• As the portion of the Internet (and data
  networks) grew in the revenue, the
  interoperability with other infrastructure
  (espeially the main telco infrastructure) got
  much more important, and NEOSS-IP was confronted
  in 2002. Various Measurements and analysis were
  added.

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KT Internet Service and Mgmt

• NeOSS-IP and its sub systems
• CORE-NMS, Premium NMS, Multicast NMS,
• Access NMS
• Analysis Systems

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NeOSS-IP and its Subsystems

• NeOSS-IP is an NMS system for IP networks in KT
  NeOSS systems
• NeOSS-IP includes subsystems for operation tools
  like
• Traffic, Performance, RIB analysis systems
• Configurations, Remote Operations support tools

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Performance Measurements

• IPAS(Internet Performance Analysis System)
• As a start point of service level (quality)
  managements
• Like sorts of network weather systems
• UDP/TCP active measurements over thousands of
  paths per minutes using probes (special-purposed
  routers)
• Focus on UDP and jitter delay and loss rather
  than simple ICMP stuffs

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Performance Measurements(2)

• What we can learn from IPAS
• General Packet Transmission or IP Service Quality
  Levels over the backbone networks
• Abrupt packet transmission delays due to events
  on the backbone networks

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Traffic Analysis

• Three ways of Traffic Understanding
• General traffic volume analysis using CORE-NMS
• Traffic flow analysis using routers and IP-FLOW
  system
• Traffic Packet Analysis using PACAS(Packet
  Characteristics Analysis system)

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Traffic Analysis (2)

• What we can learn from CORE-NMS
• The total traffic volumes over KT backbone,
  overseas, IX networks
• The link utilizations
• What we can learn from IP-FLOW
• The general trend of the traffic usage
• ex. per applications(ports), per ASN, per
  POPs/Access services and so on

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Traffic Analysis (3)

• What we can learn from PACAS
• The analysis results can be used directly for
  engineering
• Illegal packets with wrong IPs
• DDOS packets
• Out-of-Sequence/Order ratio and so on
• Packet Level Characteristics
• PDF of Packet Arrivals
• Traffic volumes at tiny time units(micorseconds
  units)
• Microscopic version of data which we can get from
  IP-Flows i.e. per ports/IP Addrs/ASN traffic
  distribution and so on

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Routing Information Management

• IRIMS(IP Routing Information Managements System)
• Routes(Prefixes) changes archives
• Realtime change monitoring supported
• Routing Daemons and SNMP are used together

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Routing Information Management(2)

• What we can learn from IRIMS
• Real time routing information change monitoring
• BGP Session and prefix changes monitoring
• ISIS links changes monitoring
• FLAPS and routing process overloads
• Inconsistent AS

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New Features for Premium Networks

• MPLS managements
• New elements for MPLS LDP, LSP, LIB, MPLS IFs
  and Tunnels
• Dynamic LSP managements
• MPLS-TE Prototypes
• QoS Managements
• New elements for QoS(DIFF_SERV) Queues and
  policies
• DIFF_SERV management with backbone policy server
• Per class Traffic, Delay, Jitter, Loss
• Per Tunnel Traffic
• Multicast Managements
• New elements for Multicasts Multicast tunnels,
  RPs, Ifs,
• IGMP, PIM_SM, MSDP Management

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Near Future Beyond Broadband

• Service Needs
• More bandwidths
• Various access technology
• Personalization
• Convergences in services
• BCN Service Concepts
• Broadband Convergence Network
• high-quality broadband multimedia services
  Integrating telecom, broadcasting, and Internet
  seamlessly at anywhere, anytime, and using any
  devices
• KEYWORDS QoS, IPv6, MPLS, IMS, Convergence

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BCN at the moment

• BcN(backbone network-the premium network) has
  been deploying since 2005
• DIFFSERV for the basic backbone CoS
• MPLS for the enhanced availability
• Packetized Voice, IP-TV, and Wibro on the
  premium network
• CoS applied for service classes
• BcN Service Infrastructure including various
  control mechanisms will be implemented soon
• IMS based service control systems Resources and
  Services(Session)
• Large-scale user(subscribers) handling features

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NMS Expectations
AS IS

• BROADBAND and its components have been the main
  NMS objects so far
• Mainly networks, elements, and facilities are
  main concerns for NMS

To Be

• Ubiquitous service and convergence might be
  regarded as the next theme
• End-to-end application/service supports will be
  the next concerns

• The volumes, numbers, core-technologies of the
  networks will be continuously increasing
• The underlying network functions and the
  services will be tightly coupled and the layering
  conventions will be ambiguous

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Concluding Remarks What we will do

• Even though the underlying technologies or
  networks is expected to be more complex, the NMS
  and its view for operators should be simpler
  Integrated but selectable(and flexible) user
  interfaces
• On the shared platforms, the interoperability
  between NMS systems for various networks/services
  should be achieved.
• To support convergence trends, the unified
  platform for supporting customers will be more
  important.