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296
C
HAPTER
7: M
ONITORING
THE
N
ETWORK
Controlling
Monitoring Type and
Polling Rates
Depending upon the topology and geographical distribution of your
network, regular polling of some segments of your network may cause
more network traffic than is desirable.In order to address this, 3Com
Network Director allows you to control the amount of traffic generated
on your network by the monitors.There is a three level hierarchy in this
mechanism:
■
Whole Map
:
The
Monitoring
tab in the
Tools > Options
dialog box
allows you to control the traffic generated by monitoring for the
whole map.Unless you explicitly override the settings at the subnet or
device level, devices will use the settings you specify here.
■
Subnet
: The
Monitoring
tab in the
Properties
dialog box for a subnet
allows you to override the whole map settings for a particular subnet
and so control the traffic generated by the monitoring of devices
within that subnet.Unless you explicitly override the settings at the
device level, devices within the subnet will use the settings you specify
here.
■
Device
: The
Monitoring
tab in the
Properties
dialog box for a device
allows you to override the whole map and, if applicable, subnet
settings for a particular device, and so control the traffic generated by
the monitoring of that device.
Unless explicitly overridden at the device level, devices that appear in
more than one subnet, such as routers and layer-3 switches, inherit the
whole map settings directly rather than inheriting them from one of their
subnets.
The mechanism allows you to control two sets of parameters at each
level: the monitoring mode and the monitor poll rate.
Monitoring Mode
There are various ways in which 3Com Network Director can monitor
your network, each of which generates a different amount of network
traffic.By selecting different monitoring modes you can control the
amount of generated traffic.There are four basic monitoring modes that
are supported:
Full Monitoring:
When a device is monitored using full monitoring
mode all of the monitors for the device are enabled.This monitoring
mode provides the most monitoring information for a device and allows
you to monitor links using that device, but generates the most traffic.
Summary of Contents for 3C15500 - Network Director - PC
Page 4: ......
Page 34: ......
Page 38: ...34 ABOUT THIS GUIDE ...
Page 50: ...46 CHAPTER 1 GETTING STARTED ...
Page 64: ...60 CHAPTER 2 PRODUCT ACTIVATION ...
Page 213: ...Components 209 Figure 75 Export to Visio Dialog Box ...
Page 220: ...216 CHAPTER 5 WORKING WITH THE MAP Figure 84 Double Clicking on a Router in the Tree ...
Page 264: ...260 CHAPTER 6 VIEWING DEVICE DETAILS Figure 117 Security Tab for a Device ...
Page 276: ...272 CHAPTER 6 VIEWING DEVICE DETAILS ...
Page 322: ...318 CHAPTER 7 MONITORING THE NETWORK ...
Page 385: ...Examples 381 Figure 189 Attach Alerts Dialog Box ...
Page 406: ...402 CHAPTER 9 PERFORMANCE REPORTING ...
Page 431: ...Components 427 History View dialog box Figure 210 History View Dialog Box ...
Page 440: ...436 CHAPTER 10 RMON Host View dialog box Figure 219 Host View Dialog Box ...
Page 476: ...472 CHAPTER 11 CREATING REPORTS ...
Page 502: ...498 CHAPTER 12 CONFIGURING SINGLE DEVICES ...
Page 526: ...522 CHAPTER 13 VLAN MANAGEMENT Figure 272 Options Dialog Box VLANs Tab ...
Page 567: ...Components 563 Figure 305 Selecting the Link to the End Station on the Map ...
Page 626: ...622 CHAPTER 14 BULK CONFIGURATION ...
Page 684: ...680 CHAPTER 16 UPGRADING DEVICE SOFTWARE ...
Page 814: ...810 CHAPTER 19 BACKING UP DEVICE CONFIGURATIONS ...
Page 838: ...834 CHAPTER 20 LIVE UPDATE ...
Page 894: ...890 APPENDIX G ADDING MAC ADDRESS VENDOR TRANSLATIONS ...