3Com 3C15500 - Network Director - PC, User Manual, Page: 137 / 924

Components 133
Note that the analysis is always performed on the whole of your map, not
just the recent additions. You can force a new version of the report to be
generated from the
Tools > Reports dialog box, although generally there
should be little need to do this since it should be the same as the one
from the most recent discovery, unless you have manually changed the
map.
See “Report Examples” on page 861 for a full list of the
misconfigurations that may be detected, and possible suggested
optimizations.
The Changes Report When a rediscovery is performed on a map that already contains some
devices, 3Com Network Director compares the contents of the current
map with the newly acquired information. Any differences it finds are
used to populate the
Changes report. Typical changes are, a device has
changed configuration (e.g. a new unit has been added), or a device has
been moved and as a result its link properties have changed.
The Changes report will not produce information on IP address changes
to avoid large reports being generated on networks using DHCP. For a
similar reason, the Changes report will not produce information on
devices that appear between network discoveries as users log in and log
out due to the Network Login support. See
“Network Login” on
page 227 .
Also see “Report Examples” on page 861 for a full list of the changes
that may be detected.
The Displayed Map After a discovery operation has completed and you have dismissed the
Network Discovery Summary dialog box, the map and tree views will be
updated to reflect the new information.
Initial Map Creation
After the first discovery on a new map, 3Com Network Director simply
adds all the new devices to the map as it feels appropriate. The map is
initially shown at the top-level map of the
Grouped Network View . This
map shows all the subnets it has detected and any routers it discovered
on those subnets. It also includes the additional subnets that were
detected, when communicating with the routers, that weren’t part of the
list of subnets to discover. These are shown as undiscovered subnets.
3Com Network Director attempts to arrange (layout) the devices and
subnets so that they do not overlap. For information on using the map,