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C
HAPTER
15
| Basic Administration Protocols
Remote Monitoring
– 413 –
The switch supports mini-RMON, which consists of the Statistics, History,
Event and Alarm groups. When RMON is enabled, the system gradually
builds up information about its physical interfaces, storing this information
in the relevant RMON database group. A management agent then
periodically communicates with the switch using the SNMP protocol.
However, if the switch encounters a critical event, it can automatically send
a trap message to the management agent which can then respond to the
event if so configured.
C
ONFIGURING
RMON
A
LARMS
Use the Administration > RMON (Configure Global - Add - Alarm) page to
define specific criteria that will generate response events. Alarms can be
set to test data over any specified time interval, and can monitor absolute
or changing values (such as a statistical counter reaching a specific value,
or a statistic changing by a certain amount over the set interval). Alarms
can be set to respond to rising or falling thresholds. (However, note that
after an alarm is triggered it will not be triggered again until the statistical
value crosses the opposite bounding threshold and then back across the
trigger threshold.
CLI R
EFERENCES
"Remote Monitoring Commands" on page 653
C
OMMAND
U
SAGE
If an alarm is already defined for an index, the entry must be deleted
before any changes can be made.
P
ARAMETERS
These parameters are displayed:
Index
– Index to this entry. (Range: 1-65535)
Variable
– The object identifier of the MIB variable to be sampled.
Only variables of the type etherStatsEntry.n.n may be sampled.
Note that etherStatsEntry.n uniquely defines the MIB variable, and
etherStatsEntry.n.n defines the MIB variable, plus the etherStatsIndex.
For example, 1.3.6.1.2.1.16.1.1.1.6.1 denotes
etherStatsBroadcastPkts, plus the etherStatsIndex of 1.
Interval
– The polling interval. (Range: 1-31622400 seconds)
Sample Type
– Tests for absolute or relative changes in the specified
variable.
Absolute
– The variable is compared directly to the thresholds at
the end of the sampling period.
Delta
– The last sample is subtracted from the current value and
the difference is then compared to the thresholds.
Rising Threshold
– If the current value is greater than or equal to the
rising threshold, and the last sample value was less than this threshold,
then an alarm will be generated. After a rising event has been
Содержание DG-FS4526E
Страница 4: ...ABOUT THIS GUIDE 4...
Страница 34: ...CONTENTS 34...
Страница 50: ...TABLES 50...
Страница 52: ...SECTION I Getting Started 52...
Страница 62: ...CHAPTER 1 Introduction System Defaults 62...
Страница 80: ...CHAPTER 2 Initial Switch Configuration Managing System Files 80...
Страница 82: ...SECTION II Web Configuration 82...
Страница 100: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 100...
Страница 128: ...CHAPTER 4 Basic Management Tasks Resetting the System 128...
Страница 166: ...CHAPTER 5 Interface Configuration VLAN Trunking 166...
Страница 198: ...CHAPTER 6 VLAN Configuration Configuring VLAN Mirroring 198...
Страница 516: ...CHAPTER 17 IP Services Displaying the DNS Cache 516...
Страница 562: ...CHAPTER 19 Using the Command Line Interface CLI Command Groups 562...
Страница 652: ...CHAPTER 22 SNMP Commands 652...
Страница 660: ...CHAPTER 23 Remote Monitoring Commands 660...
Страница 714: ...CHAPTER 24 Authentication Commands Management IP Filter 714...
Страница 802: ...CHAPTER 27 Interface Commands 802...
Страница 824: ...CHAPTER 29 Port Mirroring Commands RSPAN Mirroring Commands 824...
Страница 846: ...CHAPTER 32 Address Table Commands 846...
Страница 874: ...CHAPTER 33 Spanning Tree Commands 874...
Страница 886: ...CHAPTER 34 ERPS Commands 886...
Страница 928: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 928...
Страница 942: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 942...
Страница 998: ...CHAPTER 38 Multicast Filtering Commands Multicast VLAN Registration 998...
Страница 1022: ...CHAPTER 39 LLDP Commands 1022...
Страница 1064: ...CHAPTER 40 CFM Commands 1064...
Страница 1084: ...CHAPTER 42 Domain Name Service Commands 1084...
Страница 1090: ...CHAPTER 43 DHCP Commands DHCP Client 1090...
Страница 1122: ...CHAPTER 44 IP Interface Commands IPv6 Interface 1122...
Страница 1124: ...SECTION IV Appendices 1124...
Страница 1129: ...APPENDIX A Software Specifications Management Information Bases 1129 Trap RFC 1215 UDP MIB RFC 2013...
Страница 1130: ...APPENDIX A Software Specifications Management Information Bases 1130...
Страница 1152: ...COMMAND LIST 1152...
Страница 1161: ......
Страница 1162: ...DG FS4526E 042012 HW R01...