Chapter 25: Polling - Tavve zoneranger User Manual

Chapter 25: Polling

ZoneRanger has the capability to monitor managed devices for status changes. ZoneRanger supports the
following types of polling:
•
ICMP polling (often called "ping") to determine the status of IP interfaces
•
SNMP querying of
determine the status of individual interfaces
•
TCP polling of TCP ports on nodes to determine the status of processes listening on the ports
The Configuration > Polling page on the ZoneRanger provides the interface for polling configuration.
By default, when a device is discovered, it is automatically configured to be polled for status changes.
This behavior may be changed on the Configuration > Discovery page Options tab by unchecking
Auto managing newly discovered nodes.
ICMP Polling
ZoneRanger uses ICMP polling to monitor the status of IP interfaces. By default, ZoneRanger polls
interfaces on managed devices every 5 minutes (300 seconds). Using the Configuration > Polling
page Interface Settings tab, different polling rates as well as ICMP timeouts and retries may be
configured for nodes, specific IP interfaces, or groups of IP interfaces.
Whether or not ICMP polling is enabled or disabled for a particular IP interface may be configured
on the Configuration > Polling page Enable/Disable tab. By choosing the appropriate device in
the list, ICMP polling for each IP interface may be disabled by setting Poll Interface to None.
When ZoneRanger determines the status of an IP interface has changed, a tscZRIfUp or
tscZRIfDown SNMP trap is generated as appropriate. If a device is determined to have changed
state, a tscZRNodeUp or tscZRNodeDown trap will be generated. If at least one interface of a
device whose previous status was Up is determined to be Down, a tscZRNodeMarginal trap will be
generated.
ICMP Latency
As the ZoneRanger ICMP polls IP interfaces, the polling service caches the last ICMP round-trip
time for each IP interface. This value may be retrieved for all IP addresses or specific IP addresses
using the
viewIcmpLatency
retains the last ICMP latency measurement for each polled IP interface.
SNMP Polling
For those interfaces which do not have an IP address, ZoneRanger can be configured to use SNMP
polling to monitor the status. The SNMP status of an interface is determined by the SNMP querying
of
ifTable
does NOT automatically configure any interfaces to use SNMP polling. When SNMP polling is
configured, ZoneRanger polls those interfaces on managed devices every 5 minutes (300 seconds).
Using the Configuration > Polling page Interface Settings tab, different polling rates for nodes,
specific interfaces, or groups of interfaces may be configured. If the interface is an SNMP interface
without an IP address, the node name in the database should be used as the pattern.
Whether or not SNMP polling is enabled or disabled for a particular interface may be configured on
the Configuration > Polling page Enable/Disable tab. By choosing the appropriate device in the
list, SNMP polling for each interface may be enabled by setting Poll Interface to SNMP.
ZoneRanger 5.5 User's Guide
information (
ifTable
command from a joined Ranger Gateway. The polling service only
information (
ifOperStatus
) of SNMP enabled nodes to
ifOperStatus
) of SNMP enabled nodes. By default, ZoneRanger
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