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2002-03-14
Chonnam National UniversityComputer Science Network Laboratory
국장미([email protected])
Tel: +82-062-530-0898
New Design Schemes for Lightweight TMN Mediation
Device / Q3 Adapter
2Network Lab. Integrated Network Management
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Contents• Background
• Introduction
• Functional Components
• Prototype-Functional Configurations
• Lightweight MO Definitions
• Mediation for M Interface
• Adaptation for M interface
• Conclusion
3Network Lab. Integrated Network Management
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1. Background• Network management uses heavy database
• Proxy based TMN agent interprets MIB as real repository– redundant information
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2. Introduction• Proxy based management -> new design sch
eme for Q3 agent and its gateway function
• Agents focuses on the adaptation and mediation of non-standardized messages to Q3 CMIP messages (traditional: maintain repository)
• Lightweight agent– Mib of agent: only Containment, Associatioin
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2. Introduction (cont’)
• Access by managing system to the managed resources are through the adaptation and mediation of a proxy agent
• Defined restricted Qx interface and M interface
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3. Functional Components
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3. Functional components (cont’)
• Simple and component based• Sub agents are running on separate process spaces• Translating CMIP messages into DB queries
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3. Functional components• CMIP Agent X protocol
– SNMP AgentX Proposed IETF standard• Master
• Subagents
• Protocol that operate between the master and subagents
– Concept of subagent is applied to CMIP– AgentX protocol must be defined in CMIP conte
xt
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4. Prototype-Functional Configurations
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4. Prototype-Functional Configurations
• AgentCore block– Forwarding the received CMIP msg to target M
Os
• UsrHooks block– Implementation of adaptation and mediation– MO extracts a list of {type, value} – Qx M-action request to its user-defined hook fun
ction– Qx M-action reply, M-EVENT-REPORT
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4. Prototype-Functional Configurations
• Rule DB– Specification of {mo, attribute-relation, tuple}
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5. Lightweight MO Definitions
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5. Lightweight MO Definitions• Each MO may be implemented with minimal set of
in-memory attribute• Containment, Association relationship
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6. Mediation for M Interface• Prototype
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6. Mediation for M Interface• Loosely-coupled mediation architecture
– The more tightly coupled, the less modularity and reusability of agent are achived
• All of the received Q3 CMIP messages are converted into Qx M-ACTION only
• M-ACTION can be used to carry the operation
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7. Adaptation for M interface• prototype
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7. Adaptation for M interface• Adaptation
– Translating message from one to another– Three types
• String PDU: char streams
• Meta PDU: type-value sequence
• Xdr PDU:– RFC 1832,
– description and encoding of data( similar to ASN.1 )
– RPC, NFC use XDR to describe the format of data
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8. Conclusion• New design scheme for a lightweight TMN
Q3 agent and its loosely-coupled gateway function
• Remaining works– Definition of protocol-insensitive DB schema fr
om the standardized MIBs– Applying of agent extensibility– Fully implementing the lightweight MIB/MIT
