Tavve zoneranger User Manual page 139

Figure 34-26. Configuration > Discovery page Options tab
Configuring Discovery Options
The Periodic discovery interval checkbox enables ZoneRanger to run discovery on a periodic
basis. The value in the Periodic discovery interval field specifies the periodic discovery
interval in days, hours, and minutes. The default interval is 7 days. If you change the interval,
discovery runs again after the interval you specified passes. The interval begins when you save
the discovery configuration.
When Search for additional nodes is checked, discovery can use several methods to find nodes
that are not specifically configured using seed nodes and ping ranges. Minimally, discovery
examines the network connectivity of nodes specified by the seed list and ping ranges to find
intermediate nodes. When Search for additional nodes is unchecked, no extra searching is
performed, and only those nodes specified by the seed list and ping ranges are discovered.
Note: To use root cause correlation, you must check Search for Additional Nodes. This
examination of network connectivity is required to build the root cause correlation rules.
Using additional advanced methods, discovery can search for nodes that fall outside of the seed
node list, ping ranges and connectivity constraints. The following methods are available:
Option
Read IP route
table
Read ARP Cache
Broadcast ping
enabled
The Auto enable polling for newly discovered nodes checkbox enables polling of newly
discovered nodes, using parameters set on the Configuration > Polling page. Unchecking this
box disables polling of newly discovered nodes. You can use the Configuration > Polling page
to enable polling manually. In order for a node to be polled, it must also be managed be the
ZoneRanger.
ZoneRanger 5.5 User's Guide
Description
This method uses SNMP to examine IP
routing tables on discovered nodes to
discover additional IP addresses
This method uses SNMP to examine ARP
caches on discovered nodes to discover
additional IP addresses
This method sends a broadcast ping to
discovered subnets, to discover
additional IP addresses
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