WUGS-20 Graphical Monitor Wei Deng Applied Research Laboratory - - PDF document

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WASHINGTON UNIVERSITY IN ST LOUIS

WUGS-20 Graphical Monitor

Wei Deng Applied Research Laboratory Washington University, St. Louis

wdeng@arl.wustl.edu

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Introduction

• Course project of CS577
• Software project: Visualize information for

WUGS-20 Gigabit switching system

• Software Architecture
• Design Issues
• Implementation
• Future Extension
• Demo slides

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Software Architecture

Distributed structure Prober Switch Controller

Switch

retriever memory parser GUI

Switch side User side

TCP Socket request data

ATM socket AAL0

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Design Issues

• ATM Socket (16 bytes data)
• User Interactive Response Time
• Data Structures
• Keep the whole VXT and maintenance registers

for each port in local memory

• For multicast calcualtion, need additional VXI
• Multipoint connection calculation algorithm
• Get information RC, CYC1,2, EADR, VXI1,2 from

memory

• Using a recursive function

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Multicast connection calculation

• Routing Control (000 010 001 011 111)
• External Routing Address
• Recycling flags
• Virtual Path / Circuit Identifier
• Input (a item of in_port)
• Output (array of (out_port, vxi) tuples)

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Implementation

• GUI Implementation ( J

ava / Swing )

• Retriever ( thread, TCP socket)
• Parser (passive module, initiated by user

interaction)

• Prober (ATM socket, TCP socket)

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GUI Layout

Switch Maintenance Registers Virtual Path/ Circuit Table

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User Interaction

• Mouse actions (currently only supported mode)
• Clickable area : port, table entries

Information on GUI

• Virtual Path / Circuit Table
• Maintenance Registers
• Link / Port Status
• Statistical Information

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Retriever Implementation

• Using J

ava Thread, works asynchronously with GUI

• Retrieved data stored in memory, share data
• 2 threads, with different interval time between two

retrieve operations

• Communicate with remote prober using TCP socket

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Parser Implementation

• Working in passive mode, works like a filter
• Transfer byte array data stored in meory to text

information which will be presented in GUI

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Prober Implementation

• Working in daemon mode, always listen to TCP

socket connections on designated TCP port

• Can accept several connections simultaneously,

but can only execute one probe a time, because

• f the restrictions in ATM socket
• Acceptable commands
• REG PORT FIELDNUM
• TBL PORT

Return table entries whose Busy/ Idle bit = 1 every entry 18 bytes (16 + VXI) First VPT, then VCT, ends with VPTEND / VCTEND

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Extension and Enhancement

• User modifiable graphical component (Table,

writable maintenance register fields) ⇒Graphical controller

• Better representation of link load information for

each port

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Snapshot 1

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Snapshot 2

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Snapshot 3

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Snapshot 4

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Snapshot 5