Tavve zoneranger User Manual page 78

If the SNMP option under Poll Interface is unavailable for the interfaces on a device (i.e. there is
no ifIndex listed), that means the device did not respond to an SNMP request when it was
discovered. If the device is configured to support SNMP, verify the settings on the Configuration >
SNMP page are correct for this device. Then use the Diagnostics > SNMP walk page to test
whether or not ZoneRanger can use SNMP to query the device. Once ZoneRanger can successfully
make SNMP requests to the device, the device needs to be rediscovered using the Configuration >
Discovery page.
When ZoneRanger determines the status of an 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.
TCP Polling
ZoneRanger uses TCP polling of TCP ports on nodes to determine the status of processes listening
on those TCP ports. By default, ZoneRanger polls TCP ports on managed devices every 5 minutes
(300 seconds). Use the Configuration > Polling page TCP Settings tab to configure different
polling rates for an individual TCP Port as well as modifying the default TCP port polling rate.
Polling for a particular TCP port may be enabled or disabled using the Polling Enabled column on
the Configuration > Polling page TCP Settings tab. When devices are discovered, the TCP ports
listed on this tab will automatically be polled. If a Polling Enabled checkbox is unchecked, polling
for the corresponding TCP port is disabled for all nodes, regardless of the per-node Poll TCP
settings.
TCP port status propagation for specific services can be enabled or disabled for all nodes. If status
propagation is enabled, TCP port status effects the overall status of nodes. Thus, if a TCP port does
not, the TCP port will be in the Down state and the node will be in the Marginal state. When
ZoneRanger determines the status of an TCP port has changed, a tscZRTcpUp, tscZRTcpBusy,
tscZRTcpRefused, or tscZRTcpTimout SNMP trap is generated as appropriate.
All of the TCP ports listed on the Configuration > Polling page TCP Settings tab, are configured
on the Configuration > Discovery page TCP Ports tab. If a TCP is added or removed on the
Configuration > Discovery page TCP Ports tab, that TCP port will be added or removed from the
Configuration > Polling page TCP Settings tab.
ZoneRanger 5.5 User's Guide 78