Understanding SNMP
polling, CLI polling, and thresholds
As indicated in
SNMP-polling and
CLI-polling configuration and operation,
uses SNMP polling and CLI polling to monitor the managed
network. The monitoring is controlled by polling-related and threshold-related
objects that are created for
through the Polling and Thresholds Console.
SNMP-polling and
CLI-polling configuration and operation

monitors the health of the network by periodically
sending SNMP polls or CLI polls to the routing-enabled devices to gather status
information. The polled status information, in addition to the received BGP and
OSPF trap messages, received BGP and OSPF syslog messages, and received
IP Availability Manager
status updates, serves as input to the correlation
analysis function of
.
Appendix E, SNMP Poller,
describes SNMP polling for correlation analysis.
The execution of SNMP polling
requires SNMP read credentials, and the execution of CLI polling requires CLI
login credentials. The SNMPv1, v2c, or v3 read credentials for a discovered
device are stored in the attributes of the SNMPAgent object that is created for
the device’s SNMP agent. The CLI login credentials for a discovered device are
stored in a CLI device-access object.
imports SNMPAgent and CLI device-access objects from
IP Availability Manager
.