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play_arrow Overview
- play_arrow Introduction
  - Junos Space Platform Workspaces Overview
  - Viewing the Junos Space Platform Dashboard
play_arrow Devices
- play_arrow Device Management
- play_arrow Systems of Record
  - Systems of Record in Junos Space Overview
  - Understanding How Junos Space Automatically Resynchronizes Managed Devices
- play_arrow Device Discovery Profiles
- play_arrow Modeling Devices
- play_arrow Device Authentication in Junos Space
- play_arrow Viewing Device Inventory
- play_arrow Exporting Device Inventory
- play_arrow Configuring Juniper Networks Devices
- play_arrow Device Adapter
- play_arrow Device Configuration Management
- play_arrow Adding and Managing Non Juniper Networks Devices
  - Adding Unmanaged Devices
  - Modifying Unmanaged Device Configuration
- play_arrow Accessing Devices
- play_arrow Logical Systems (LSYS)
- play_arrow Tenant System (TSYS)
- play_arrow Device Partitions
- play_arrow Custom Labels
- play_arrow Verifying Template, Image Deployment, Script Execution, and Staged Images on Devices
- play_arrow Device Monitoring
  - Viewing Alarms from a Managed Device
  - Viewing the Performance Graphs of a Managed Device
- play_arrow Device Maintenance
play_arrow Device Templates
- play_arrow Overview
  - Device Templates Overview
- play_arrow Template Definitions
- play_arrow Configuring Devices using Device Templates
- play_arrow Configuring Devices using Quick Templates
- play_arrow Device Template Administration
play_arrow CLI Configlets
- play_arrow Overview
- play_arrow CLI Configlets
- play_arrow Configuration Views
- play_arrow XPath and Regular Expressions
- play_arrow Configuration Filters
play_arrow Images and Scripts
play_arrow Reports
- play_arrow Reports Overview
  - Reports Overview
- play_arrow Report Definitions
- play_arrow Reports
play_arrow Network Monitoring
- play_arrow Overview
  - Network Monitoring Workspace Overview
  - Working with the Network Monitoring Home Page
- play_arrow Managing Nodes
- play_arrow Searching for Nodes and Assets
  - Searching for Nodes or Nodes with Asset Information
  - Working with Node Assets
- play_arrow Managing Outages
  - Viewing and Tracking Outages
  - Configuring Scheduled Outages
- play_arrow Using the Network Monitoring Dashboard
  - Viewing the Network Monitoring Dashboard
- play_arrow Managing and Configuring Events
- play_arrow Managing and Configuring Alarms
- play_arrow Managing and Configuring Notifications
  - Viewing, Configuring, and Searching for Notifications
  - Configuring Event Notifications, Path Outages, and Destination Paths
- play_arrow Managing Reports and Charts
- play_arrow Network Monitoring Topology
- play_arrow Network Monitoring Administration
play_arrow Configuration Files
- play_arrow Overview
  - Managing Configuration Files Overview
  - Viewing Configuration File Statistics
- play_arrow Managing Configuration Files
play_arrow Jobs
- play_arrow Overview
  - Jobs Overview
- play_arrow Managing Jobs
play_arrow Role-Based Access Control
- play_arrow Overview
  - Role-Based Access Control Overview
- play_arrow Roles
- play_arrow User Accounts
- play_arrow User Groups
- play_arrow Domains
- play_arrow Remote Profiles
- play_arrow API Access Profiles
- play_arrow User Sessions
play_arrow Audit Logs
- play_arrow Overview
  - Junos Space Audit Logs Overview
- play_arrow Managing Audit Logs
play_arrow Administration
play_arrow Troubleshooting
- play_arrow Knowledge Base
  - Juniper Knowledge Base

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Network Monitoring Topology Overview

Release: Junos Space 22.3

date_range 10-Jan-23

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On the Topology page in the Network Monitoring workspace, you can view Junos Space nodes, Fault Monitoring and Performance Monitoring (FMPM) nodes, and devices that were discovered by Junos Space Network Management Platform, as well as node links and the alarm state of the services links.

Note:

On the Topology page, the term node refers to Junos Space nodes, FMPM nodes, or devices discovered by Junos Space Network Management Platform. The term node link refers to the link between the nodes.

The EnhancedLinkd network topology discovery daemon is used to discover the network topology. Five physical link discovery methods—Bridge Discovery Protocol, Cisco Discovery Protocol (CDP), IS-IS, Link Layer Discovery Protocol (LLDP), and OSPF—are supported and enabled by default. After the SNMP interface is discovered, the availability of links in the topology depends on the following:

Note:

Junos Space Platform currently supports only OSPF version 2 for topology discovery.

The time that the EnhancedLinkd daemon waits after a node has been provisioned; the default is 60 seconds
The time taken for the EnhancedLinkd deamon to scan the node
The time after which the node links are refreshed automatically; the default is 60 seconds

After the topology is discovered by Junos Space Platform, any changes to the topology are automatically detected. This includes changes in logical entities, such as Ethernet services and VPNs, that are discovered by Junos Space Platform. The EnhancedLinkd daemon updates only the topology changes in the database and does not rescan the entire network. This incremental link discovery ensures that data related to topology changes is updated dynamically. In addition, the dynamic update ensures that only the node or the node link that was updated is redrawn and not the entire topology.

Note:

From Junos Space Network Management Platform Release 14.1R1 onward, the SNMP polling time for discovering links between devices is set using the rescan_interval parameter in the enlinkd-configuration.xml file. In prior releases, this SNMP polling time for discovering links between devices was set using the snmp_polling parameter in the linkd.xml file. The default value for the rescan_interval parameter is 86,400,000 milliseconds

A sample of the /opt/opennms/etc/enlinkd-configuration.xml is as follows:

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<?xml version="1.0" encoding="ISO-8859-1"?>
<linkd-configuration threads="5"
                     initial_sleep_time="60000"
                     rescan_interval="86400000"
                     use-cdp-discovery="true"
                     use-bridge-discovery="true"
                     use-lldp-discovery="true"
                     use-ospf-discovery="true"
                     use-isis-discovery="true"
                     />

For more information about the parameters in the enlinkd-configuration.xml file, see http://www.opennms.org/wiki/Linkd .

The node link status is color-coded—a green link indicates that the link is up and a red link indicates that a link is down. In addition, if an SNMP trap is received indicating that the node link status has changed, then the EnhancedLinkd daemon updates the node link in the topology to indicate the current status of the node link.

The alarm state of services links is also color-coded—a green line indicates that no service-impacted alarms are present and that the service status is up; a red line indicates that at least one service-impacted alarm is present and that the service status is down.

Note:

The color-coding of the link status is displayed only if the option to display the link status is selected; this option is not selected by default.
Similarly, the color-coding of the alarm state for services links is displayed only if the option to display the alarm state for services links and link status are selected; these options are not selected by default.
The node link data and alarm states for services links are automatically refreshed in the network monitoring topology only if the options to automatically refresh the topology is selected; this option is not selected by default.

The links on a node can also be rediscovered on demand manually by requesting for a rescan of a node.

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