3Com 3c17300 Implementation Guide - Page 56

The RMON Groups, Benefits of RMON, Alarms, Events, It improves your efficiency

Get 3Com 3c17300 PDF manuals and user guides View all 3Com 3c17300 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 56 highlights

58 CHAPTER 7: STATUS MONITORING AND STATISTICS the same network as the Switch and can manage the Switch by in-band or out-of-band connections. The RMON Groups The IETF define groups of Ethernet RMON statistics. This section describes the two groups supported by the Switch 4200 Series, and details how you can use them. Alarms The Alarms group provides a mechanism for setting thresholds and sampling intervals to generate events on any RMON variable. Alarms are used to inform you of network performance problems and they can trigger automated responses through the Events group. Events The Events group provides you with the ability to create entries in an event log and send SNMP traps to the management workstation. Events are the action that can result from an RMON alarm. In addition to the standard five traps required by SNMP (link up, link down, warm start, cold start, and authentication failure), RMON adds two more: rising threshold and falling threshold. Effective use of the Events group saves you time; rather than having to watch real-time graphs for important occurrences, you can depend on the Event group for notification. Through the SNMP traps, events can trigger other actions, therefore providing a way to automatically respond to certain occurrences. Benefits of RMON Using the RMON features of your Switch has three main advantages: ■ It improves your efficiency Using RMON allows you to remain at one workstation and collect information from widely dispersed LAN segments or VLANs. This means that the time taken to reach a problem site, set up equipment, and begin collecting information is largely eliminated. ■ It allows you to manage your network in a more proactive manner If configured correctly, RMON can deliver information before problems occur. This means that you can take action before they affect users. In

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
58
C
HAPTER
7: S
TATUS
M
ONITORING
AND
S
TATISTICS
the same network as the Switch and can manage the Switch by in-band
or out-of-band connections.
The RMON Groups
The IETF define groups of Ethernet RMON statistics. This section describes
the two groups supported by the Switch 4200 Series, and details how
you can use them.
Alarms
The Alarms group provides a mechanism for setting thresholds and
sampling intervals to generate events on any RMON variable.
Alarms are used to inform you of network performance problems and
they can trigger automated responses through the Events group.
Events
The Events group provides you with the ability to create entries in an
event log and send SNMP traps to the management workstation. Events
are the action that can result from an RMON alarm. In addition to the
standard five traps required by SNMP (link up, link down, warm start, cold
start, and authentication failure), RMON adds two more: rising threshold
and falling threshold.
Effective use of the Events group saves you time; rather than having to
watch real-time graphs for important occurrences, you can depend on
the Event group for notification. Through the SNMP traps, events can
trigger other actions, therefore providing a way to automatically respond
to certain occurrences.
Benefits of RMON
Using the RMON features of your Switch has three main advantages:
■
It improves your efficiency
Using RMON allows you to remain at one workstation and collect
information from widely dispersed LAN segments or VLANs. This
means that the time taken to reach a problem site, set up equipment,
and begin collecting information is largely eliminated.
■
It allows you to manage your network in a more proactive
manner
If configured correctly, RMON can deliver information before problems
occur. This means that you can take action before they affect users. In