Users Guide

Configuring IT Assistant to Monitor Your Systems 47
IP Subnet Ranges for Servers
Tom’s first decision is to determine which of the 1,000 servers he wants to monitor with IT Assistant.
Tom may want to record the IP subnet range of each subnet he wants to include in his discovery, any
systems or ranges he wants to exclude from discovery, corresponding community names used on each
subnet, and any other data he determines is relevant to his network. An example of a form that captures
this data appears in Table 4-2. Note that Tom may monitor systems based on subnet range, host name, or
IP address. Although it is advisable to limit the number of community names used in a network, Tom
may also define multiple public and private community names in his network environment. For example,
Tom may decide that he wants a common Get community name for all systems on this network but
unique private community names for certain data centers.
NOTE: IT Assistant offers a troubleshooting tool that can be useful in gathering system information and subnet
ranges. Access the tool by selecting Tools
→ Troubleshooting Tool from the menu bar. For more information, open
the Troubleshooting Tool dialog box and click Help.
Configuring SNMP on Each Managed System
Before configuring discovery, Tom needs to determine the Get and Set community names he wants to
use for his network, and install and configure the SNMP agent and operating system SNMP service of
each server he wants to manage. See "Configuring SNMP for Server Manageability (Both Scenarios)."
Table 4-2 provides information about the remote systems that Tom is monitoring.
Table 4-2. Example Subnet Ranges, IP Addresses, or Host Names and Corresponding Information for Data Center and
Remote Servers
System
Group Name
Include Subnet
Range
Exclude Hosts or
Subnet Range
Public/Private
Community Names
Number of
Servers on
Subnet
Longest Ping
Response Time
Observed on
Subnet
Data Center
Servers 1
192.166.153.* 192.166.153.2 dcp123/dcsecure01 100 64
Data Center
Servers 2
192.166.154.* examplehost dcp123/dcsecure02 100 128
Data Center
Servers 3
192.166.155.* 192.166.155.10-25 dcp123/dcxprivall 100 78
Data Center
Servers 4
192.166.156.* dcp123/dcxprivall 100 32
Data Center
Servers 5
192.166.157.* dcp123/dcxprivall 100 146
Data Center
Servers 6
192.166.158.* dcp123/dcxprivall 100 148
Data Center
Servers 7
192.166.159.* dcp123/dcxprivall 100 132