Download Internet Dept/Network Strategic Group Routing

A Broadband Network Management Practice:
KT Internet
2006.9.28
Jinhyoun Youn ([email protected])
KT Network Strategic Group/
Internet Department
네트워크부문 인터넷담당
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
Internet Dept/Network Strategic Group
Brief History of KT Internet Service
Internet Dept/Network Strategic Group
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.
Internet Dept/Network Strategic Group
KT Internet Service and Mgmt
NeOSS-IP and its sub systems
- CORE-NMS, Premium NMS, Multicast NMS,
- Access NMS
- Analysis Systems
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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)
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
Traffic Analysis (3)
What we can learn from PACAS
- The analysis results can be used directly for engineering
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Illegal packets with wrong IPs
DDOS packets
Out-of-Sequence/Order ratio and so on
- Packet Level Characteristics
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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
Internet Dept/Network Strategic Group
Routing Information Management
IRIMS(IP Routing Information Managements System)
- Routes(Prefixes) changes archives
- Realtime change monitoring supported
Routing Daemons and SNMP are used together
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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
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Per class Traffic, Delay, Jitter, Loss
Per Tunnel Traffic
Multicast Managements
- New elements for Multicasts: Multicast tunnels, RPs, Ifs,
- IGMP, PIM_SM, MSDP Management
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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
Internet Dept/Network Strategic Group
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.
Internet Dept/Network Strategic Group