1. A Broadband Network Management Practice: KT Internet
Jinhyoun Youn
KT Network Strategic Group/
Internet Department

2. 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

3. Brief History of KT Internet Service

4. 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 Various Measurements and analysis were added.

5. KT Internet Service and Mgmt
NeOSS-IP and its sub systems
CORE-NMS, Premium NMS, Multicast NMS,
Access NMS
Analysis Systems

6. 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

7. 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

8. 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

9. 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)

10. 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

11. 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

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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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.