HP Web Jetadmin - Device Information Polling and Related Features

5
DEVICE TABS POLLING
Device tabs polling is invoked when a user has
either the Troubleshoot or Status tab features
enabled with devices selected (Figure 5). Again,
the polling works independently from other
polling and has its own settings under Tools >
Options (see Figure 1 on page 3 above).
ALERTS POLLING
Alerts polling is closely related to alerts
processing and activated alerts subscriptions. Two
main alerts polling mechanisms augment SNMP
traps, which are the main triggers for general and
critical alerting. Alerts polling is adjustable
through Tools > Options > Device Management >
Device Polling (Figure 6). HP Web Jetadmin polls
each device for each alert event as configured in
alerts subscriptions. If the poll detects a device in
an alert state—such as Cover Open or Toner
Low—an alert is sent. Many of these alert events
also rely on SNMP traps as the main trigger.
Polling ensures the reliability of alerts and also
ensures that HP Web Jetadmin retains an entry in
the devices’ traps destination tables.
SUPPLIES ALERTS POLLING
Supplies alerts use a different polling that works in the background and has fixed settings. Much like
other alerts polling, its purpose is to trigger alerts for specific events. In the case of supplies alerts
polling, the events are defined by threshold levels specified within the supplies alerts subscriptions.
Supplies alerts polling gathers supply levels for devices; when a level is detected below its threshold,
an alert is sent. The alert is not sent again before the supply is replenished (defined as an increase of
30%). Supplies alerts polling also has a scalable polling rate that can change based on two factors
measured by HP Web Jetadmin:
• Supply usage rate
• Supply level proximity to the alert subscription threshold
HP Web Jetadmin matches devices to a poll rate that is appropriate for the supply level state. In this
way, the alerting system only polls frequently when needed and does not poll frequently on devices
that have full supplies or that are not depleting rapidly. The different rates at which HP Web Jetadmin
polls supply levels are:
• 1 hour
• 2 hours
• 6 hours
• 12 hours
• 24 hours
• 72 hours
• 168 hours
Figure 5—Troubleshooting tab
Figure 6—Alerts Polling rates