Avaya Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services Manual de usuario Pagina 47
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SNMP, RMON, BOOTP, DHCP, and RARP Concepts
114070 Rev. B 2-15
Capture Group
The Capture group enables the capture of packets that satisfy the Filter group
control parameters for a particular channel. Control parameters in the
bufferControlTable specify how to transfer data from the channelTable to the
captureBufferTable. For example, you can specify the maximum number of octets
from each packet that the group should store in the captureBufferTable. To use the
Capture group, you must set up the Filter group.
Alarm Group
The Alarm group allows you to set an alarm threshold and a sampling interval to
enable the RMON agent to generate alarms on any network segment it monitors.
Alarm thresholds can be based on absolute or delta values so that you can be
notified of rapid spikes or drops in a monitored value.
Each alarm is linked to an event in the event group. An event defines an action that
will be triggered when the alarm threshold is exceeded.
The alarm group periodically takes statistical samples from variables in the
Ethernet DCM and compares them to previously configured thresholds. The
Alarm Table stores configuration entries that define a variable, a polling period,
and threshold parameters. If the RMON agents determines that a sample crosses
the threshold values, it generates an event. The RMON agent monitors any
variables that resolve to an ASN.1 primitive type of integer (integer, counter,
gauge, or TimeTick) in this way.
You can specify rising or falling thresholds, indicating network faults such as slow
throughput or other network-related performance problems. You specify rising
thresholds when you want to be notified that an alarm has risen above the
threshold you specified. You specify falling thresholds when you want to be
notified that the network is behaving normally again. For example, you might
specify a falling threshold of 30 collisions per second to indicate a return to
acceptable behavior.
When you configure an alarm condition, you must define the following values:
• The monitoring interval over which data is sampled
• The variable to be sampled
• Rising and falling thresholds used to detect when network trouble starts and
when it ends
- Configuring SNMP 1
- RMON, BOOTP, DHCP 1
- Bay Networks Software License 3
- Contents 5
- 114070 Rev. B 10
- About This Guide 15
- Before You Begin 16
- Conventions 16
- Acronyms 17
- World Wide Web 21
- Customer Service FTP 21
- Support Source CD 22
- CompuServe 22
- How to Get Help 23
- Chapter 1 25
- Starting SNMP, RMON, BOOTP 25
- DHCP, and RARP Services 25
- Starting SNMP Services 26
- Starting RMON 27
- Enabling the Ethernet DCM 28
- Customizing the Ethernet DCM 28
- Starting BOOTP Services 29
- Starting DHCP 30
- Starting RARP Services 31
- Chapter 2 33
- SNMP, RMON, BOOTP 33
- DHCP, and RARP Concepts 33
- SNMP Messages 34
- Figure 2-1. Role of SNMP 35
- SNMP Implementation Notes 36
- Internet Protocol (IP) 37
- Events and Traps 37
- 2-6 114070 Rev. B 38
- Table 2-1. Severity Levels 38
- Thresholds 39
- Threshold Example 40
- RMON Overview 42
- SNM0011A 43
- RMON Architecture 44
- RMON MIB Groups 45
- 2-14 114070 Rev. B 46
- 114070 Rev. B 2-15 47
- 2-16 114070 Rev. B 48
- RMON Interoperability Issues 49
- RMON Applications 50
- RMON Memory Use 50
- 114070 Rev. B 2-19 51
- 2-20 114070 Rev. B 52
- 2-22 114070 Rev. B 54
- BOOTP Relay Agent Overview 56
- SNM0002A 57
- 2-26 114070 Rev. B 58
- SNM0001A 59
- 2-28 114070 Rev. B 60
- DHCP Overview 61
- 2-30 114070 Rev. B 62
- SNM0005A 63
- 2-32 114070 Rev. B 64
- SNM0006A 65
- 2-34 114070 Rev. B 66
- RARP Overview 67
- 2-36 114070 Rev. B 68
- Chapter 3 69
- Customizing SNMP 69
- Adding an SNMP Community 71
- Deleting an SNMP Community 72
- Adding a Manager 73
- 3-6 114070 Rev. B 74
- Deleting a Manager 75
- 3-8 114070 Rev. B 76
- Configuring Trap Exceptions 77
- Configuring Thresholds 78
- Adding a Threshold 79
- 3-12 114070 Rev. B 80
- Specifying Threshold Units 81
- 3-14 114070 Rev. B 82
- Chapter 4 83
- Customizing a DCM for RMON 83
- 4-2 114070 Rev. B 84
- Specifying the Boot Option 85
- Saving the Boot Image File 85
- 4-4 114070 Rev. B 86
- Rebooting the Ethernet DCM 87
- 4-8 114070 Rev. B 90
- Using Optivity LAN with RMON 92
- Chapter 5 95
- 5-2 114070 Rev. B 96
- Enable BOOTP on 98
- Corporate backbone 98
- Booting routers 98
- BOOTP server 98
- Customizing BOOTP 101
- 5-8 114070 Rev. B 102
- Deleting BOOTP Globally 104
- Chapter 6 105
- Customizing DHCP 105
- Deleting DHCP Globally 106
- Chapter 7 107
- Customizing RARP 107
- 7-2 114070 Rev. B 108
- Disabling RARP Globally 109
- Deleting RARP Globally 109
- Appendix A 111
- Parameter Descriptions 111
- SNMP Global Parameters 112
- 113
- SNMP Community Parameters 114
- SNMP Manager Parameters 115
- A-6 114070 Rev. B 116
- 119
- 122
- 122
- 114070 Rev. B A-13 123
- DCM Global Parameters 124
- 1:dcm_image 125
- 126
- 126
- BOOTP and DHCP Parameters 129
- 130
- BOOTP Address Parameters 131
- 114070 Rev. B A-23 133
- A-24 114070 Rev. B 134
- RARP Interface Parameters 136
- RARP Address Parameters 136
- 114070 Rev. B A-27 137
- Appendix B 139
- Default Parameter Settings 139
- (continued) 140
- RARP Parameters 143
- 114070 Rev. B Index-1 145
- 114070 Rev. B Index-3 147
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