Network Discovery and Monitoring

DX NetOps Performance Management
discovers your network and uses SNMP to collect performance data using Internet Control Message Protocol (ICMP) and Simple Network Management Protocol (SNMP).
DX NetOps Performance Management
discovers your network and uses SNMP to collect performance data using Internet Control Message Protocol (ICMP) and Simple Network Management Protocol (SNMP).
For more information about how to configure monitoring, see Configure Monitoring in a New Environment.
The following are the items that control discovery and monitoring and that you can configure:
  • Collections
    are groups of devices that share monitoring behavior through association with monitoring profiles.
  • Discovery profiles
    attempt to discover devices by identifying Internet Protocol (IP) address ranges for the data collectors. Discovery profiles define which SNMP profiles to use to contact devices in the defined IP ranges.
  • Metric families
    are related sets of metrics that are collected across several technologies. The metric definitions determine how to report the values for the metrics. Metric families normalize performance data from different devices and device types.
  • Monitoring profiles
    define the monitoring behavior, poll cycle duration and which metrics to collect, for the associated device collections.
  • SNMP profiles
    include access credentials to use for discovery and monitoring.
  • Vendor certifications
    map the MIB attributes for a particular vendor device to the metrics in supported metric families.
Discovery
During discovery,
DX NetOps Performance Management
identifies devices in your network:
  1. The
    data aggregator
    assigns IP addresses in the discovery profile IP ranges to Data Collectors.
  2. The
    data collectors
    determine whether devices respond to ICMP or SNMP.
  3. For devices that respond to SNMP, the data collector associates the device with a vendor certification and determines configuration data, which includes the following information:
    • The classification of the device, such as router or switch.
    • The device vendor, such as Cisco or Juniper.
    • The device type, such as 7700 or 8200.
  4. Group rules
    add the devices to collections.
  5. The data collector identifies components for each device using the information in the vendor certifications.
Monitoring
During operation, the data collectors query devices using SNMP MIB requests:
  1. For each device, the data collector consolidates information from each monitoring profile that is associated with each collection to which the device belongs.
  2. The data collector:
    1. Requests the supported metrics in the monitoring profiles at the fastest rate among all monitoring profiles for the device.
    2. Staggers SNMP requests within the time of the poll cycle.
    3. Batches poll responses and sends the messages to the data aggregator.
  3. The data aggregator loads the performance data to the data repository.
Non-SNMP Inventory and Performance Data
DX NetOps Mediation Manager
and
DX NetOps Virtual Network Assurance
collect inventory and performance data and load that data to
DX NetOps Performance Management
through the data collectors. If
DX NetOps Performance Management
discovers and monitors the same devices through SNMP, the data aggregator deduplicates devices with the inventory collected from
DX NetOps Mediation Manager
and
DX NetOps Virtual Network Assurance
.
DX NetOps Mediation Manager
is the standard non-SNMP data collection tool.
For more information, see the
DX NetOps Mediation Manager
documentation
.
DX NetOps Virtual Network Assurance
is the data collection and normalization tool for SDN and NFV controllers and orchestrators. For more information, see the
DX NetOps Virtual Network Assurance
documentation
.