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User’s Guide – version 1.6 NetWatch
38
The Ping Response Test service
This is one of the simplest service types NetWatch supports. On discovery a
single service is created that checks the device is responding to an ICMP echo
request. This is the same test carried out when you use the “ping” command line tool
present in virtually every operating system. The service type allows you to set the
average and maximum response time that will be set in the service when it is created;
if you change these default values at a later date they will have no effect. To change
the average or default response time for the Ping Response Test you must configure
the Ping Response Test service, not the service type.
Response Time Graphing
This can be enabled for both the Ping Response Test and the SNMP Interface
test. It is configured using the configuration screen for the Ping Response Test and
the SNMP Interface test. Once Response time graphing is selected the Response time
graph for each service can be viewed in the Reports section. It is important to note
that response time graphing does use up a lot of extra database space.
The Receive SNMP Notifications service
If a device is configured to send SNMP Notifications, or “Traps” to NetWatch, you
can choose to handle them by adding this service type to the device’s configuration.
See Appendix B for more information about SNMP notifications.
When you add the Receive SNMP Notifications service type to a device you must
specify which of the traps the device sends you wish to record. NetWatch at the
moment supports only the six standard SNMP traps. Every time a trap is received
from a device with the Receive SNMP Notifications service type selected it is
checked against the list of traps selected in the service type. If the trap is selected, it is
recorded.
When services are discovered on a device with the SNMP Notification service type
selected a service is created for each selected trap type. This allows you to alert on
some of the recorded traps. For example you may wish to record link up and link
down traps but alert on a cold start trap.
Configuring services
When you have discovered services on a device it is easy to change their settings from
the defaults provided by the service type. When you select a service or a group of
services to configure you can set most of the values you can set defaults for in the
service type. In addition you can set how often NetWatch polls each service to check
its status, and you can manage or unmanage a service.