| Preface |
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Preface
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Preface
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| Chapter 1 |
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1
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Troubleshooting Techniques and Tools
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1.1
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Using Symptoms to Identify a Problem
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1.2
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Isolating Problems
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1.2.1
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Testing Connectivity Between Network Hosts
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1.2.1.1
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Using ping on a Multihomed Host
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1.2.2
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Checking the Network Interface Parameters
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1.2.3
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Displaying and Modifying the Internet-to-Ethernet Translation Tables
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1.2.4
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Examining Network Statistics
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1.2.5
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Monitoring Network Traffic
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1.2.5.1
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Using TCPTRACE
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1.2.5.2
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Using TCPDUMP
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1.2.5.2.1
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Building Expressions
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1.2.5.2.2
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Keywords for Filtering Traces from non-OpenVMS Systems
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1.2.5.2.3
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Primitive Keywords
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1.2.5.2.4
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Primitive Expressions
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1.2.5.2.5
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Accessing Data Inside Packets
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1.2.5.2.6
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Combining Keywords
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1.2.5.3
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Analyzing Output
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1.2.5.3.1
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Link Level Headers
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1.2.5.3.2
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ARP Packets
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1.2.5.3.3
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TCP Packets
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1.2.5.3.4
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UDP Packets
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1.2.5.3.5
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UDP Name Server Requests
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1.2.5.3.6
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UDP Name Server Responses
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1.2.5.3.7
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Sun RPC Requests and Replies
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1.2.5.3.8
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IP Fragmentation
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1.2.5.3.9
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Timestamps
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1.2.5.4
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Restrictions
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1.2.5.5
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Reducing Discarded Packets
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1.2.6
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Monitoring Socket Activity
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1.2.7
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Checking Name Server Operation
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1.2.8
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Checking the Route to a Remote Host
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1.2.9
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Checking the Routes Known to a Gateway
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1.2.10
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Determine Whether Network Services Are Available
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1.2.10.1
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Displaying the Service Database
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1.2.10.2
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Displaying Service Attributes
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1.2.10.3
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Verifying Process Privileges
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1.2.10.4
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Verifying Account Privileges
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1.2.10.5
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Looking for OPCOM Messages
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1.3
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Using Online Help
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1.4
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Using OpenVMS ANALYZE Extensions
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| Chapter 2 |
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2
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Tuning Techniques
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2.1
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Subsystem Attributes
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2.1.1
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Displaying Subsystems and Attributes
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2.1.1.1
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Static and Dynamic Subsystems
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2.1.1.2
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Displaying the Attribute Values for a Subsystem
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2.1.2
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Modifying Subsystem Attribute Values
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2.1.2.1
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Reconfiguring Attributes
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2.1.3
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Configuring Attributes
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2.1.3.1
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Format of the SYSCONFIGTAB File
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2.1.3.2
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Stanza File Format
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2.1.4
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Modifying Kernel Subsystems
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2.1.5
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Modifying Socket Subsystem Attributes
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2.1.5.1
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Increasing the Maximum Number of Pending TCP Connections
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2.1.5.2
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Increasing the Minimum Number of Pending TCP Connections
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2.1.5.3
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Increasing the Maximum Size of a Socket Buffer
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2.1.6
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Modifying Internet Subsystem Attributes
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2.1.6.1
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Increasing the Size of a TCP Hash Table
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2.1.6.2
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Increasing the Number of TCP Hash Tables
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2.1.6.3
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Increasing the Size of the Kernel Interface Alias Table
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2.1.6.4
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Increasing the TCP Partial Connection Timeout Rate
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2.1.6.5
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Slowing TCP Retransmission Rate
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2.1.6.6
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Enabling the TCP Keepalive Function
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2.1.6.7
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Increasing the Timeout Rate for TCP Connection Context
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2.1.6.8
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Disabling Delayed Acknowledgment
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2.1.6.9
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Modifying the Range of Outgoing Connection Ports
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2.1.6.10
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Disabling Use of the PMTU Protocol
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2.1.7
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Displaying Socket Statistics
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2.2
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Tuning Server Applications
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2.2.1
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Configuring Memory for High Performance
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2.2.2
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Logging IP Addresses
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2.2.3
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Increasing the Auxiliary Server Connection Limit
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2.2.4
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Increasing the Maximum Number of BG Devices
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2.3
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Solving Performance Problems
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2.3.1
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Tuning Recommendations for a Primary Server
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2.3.2
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Improving Gigabit Ethernet Performance
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