Emerson Avocent Universal Management Gateway Podręcznik Użytkownika Strona 135
- Strona / 146
- Spis treści
- BOOKMARKI
Oceniono. / 5. Na podstawie oceny klientów
Appendices.....129
Appendix H:Troubleshooting From the Appliance Shell
The appliance shell is a powerful tool for advanced troubleshooting and debugging. The following
commands are examples of various ways to troubleshoot for performance and potential network-
related issues.
Network related
Example 1:Network related issues can sometimes be difficult to diagnose and troubleshoot. An
appliance that seems to communicate on the network without issue yet provides slow performing
sessions (KVM)could be suffering from a half-duplex issue.
ethtool
To troubleshoot speed and duplex negotiation issues, the ethtool command may be useful.
ethtool <interface>
netstat
Use the netstat command to identify where network traffic is flowing.
netstat -in
iostat
Use the iostat command to show CPUload, hdd and memory load. This is useful to help identify if a
bad memory module or hard drive is affecting performance.
iostat
To perform in-depth network traffic analysis, the tcpdump command can be used to capture traffic
to a file which can be imported into third-party tools.
tcpdump -w networkcapture.cap
It's possible to create elaborate scripts which can significantly aid in the troubleshooting process.
One example script is provided below, which uses the netstat command to display established
network connections sortable by activity. The script can be created using VI and saved to the
/download directory. The syntax for running the script is
./<script_name><refresh_interval> <rows_displayed><s | r> (sent | received).
#!/bin/sh
# -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
# monitorNETSTAT.sh
# Use netstat to display tcp network usage by process
# -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
- Installer/User Guide 1
- TABLE OF CONTENTS 3
- Table of Contents.....iii 5
- Product Overview 7
- Network and serial mode 8
- Web user interface (UI) 9
- VGA and USB connections 9
- CLI setup port 9
- IPv4 and IPv6 support 10
- Security 10
- Power management 10
- Auto discovery 10
- Flexible users and groups 11
- Installation 13
- Wall mounting 14
- Installation.....9 15
- Connecting the Hardware 17
- Connecting targets 18
- Installation.....13 19
- Turning On the Appliance 20
- Verifying the Connections 20
- Configuring the Appliance 21
- Configuration Example 22
- Descriptions 23
- Installation.....19 25
- Initial Appliance Setup 27
- Setting Up Your Network 28
- Firewall 29
- Port requirements 30
- Trellis™ 32
- Trellis™ platform 32
- Web User Interface 33
- Using the Sidebar 34
- Admin role 35
- Operator role 35
- User role 35
- Administration 36
- Defaults 38
- Network Settings 39
- Bridge Group Configuration 40
- OSPF and BGP 43
- Network Share 45
- User role group 45
- Password Policy 46
- Preemption Levels 46
- Adding a user 47
- Authentication 48
- Administration.....43 49
- User Target Access 50
- User Target Rights 50
- Managing user groups 51
- Appliance Administrator group 51
- Power User group 52
- User group 52
- Group Target Access 52
- Group Target Rights 53
- Manage Target Settings 54
- View Logs 54
- Administration.....49 55
- Licenses 56
- Port configuration 56
- Port assignment 57
- Serial Settings 58
- DHCP Settings 59
- Advanced settings 60
- Discovery 60
- Physical discovery 60
- Logical discovery 62
- Administration.....57 63
- Generic service processors 64
- Discovery log 65
- SPmanagement 66
- Default Users 67
- Access settings 67
- Serial management 68
- Serial console ports 69
- Data Buffering 70
- 0 with severity info 70
- Data logging 71
- Serial PDUports 71
- Serial rack PDU 71
- PDUmanagement 72
- Network PDU 73
- SNMPSettings 73
- Serial PDUs 74
- Asset Location 75
- UMIQ module 76
- Module settings 79
- Active sessions 80
- Default settings 80
- Administration.....75 81
- • AES - AES encryption 82
- Default Settings 83
- Target groups 85
- Firmware 86
- Backing up firmware 87
- USBDevices 88
- Com Digital Input 89
- Digital inputs 90
- Environment 90
- RS-485environment sensor 91
- PDU Temperature Sensors Delta 91
- Monitoring 92
- Digital Output 93
- Firewall and NAT 96
- Administration - Targets 97
- Defined networks 98
- Administration.....93 99
- Network - Hosts 101
- Add to add a new host 101
- Firewall and NAT - Hosts 101
- Services 102
- Administration.....97 103
- NATflow 105
- Firewall flow 106
- Firewall and NATflow 106
- NATsetup 108
- Firewall setup 109
- Number Description 111
- 1 Sidebar 111
- 2 Targets Table 111
- Service Processors 112
- Sessions 113
- Appliance 114
- Sessions tab 114
- Power capping 115
- UMIQ Modules 116
- KVM session optimization 116
- Targets.....111 117
- Serial Console 118
- Overview 119
- Settings 119
- Power Outlet 121
- Sensors and Events 123
- CPU and disk usage 124
- Appendices 125
- Appendices.....123 129
- Netboot Recovery 130
- #as the 131
- 0 for this parameter 131
- LAN performance 133
- WAN performance 133
- Bridge groups 134
- Hardware 134
- Network related 135
- Firewall and NAT on page 90 137
- Firewall and NAT 138
- Appendices.....133 139
- Apply when done 140
- /usr/bin/restartsnmpsvr 141
- Appendix L:Video Resolution 142
- Appendices.....137 143
- Technical Support Site 145
- About Emerson Network Power 146
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