MIBs accessed for IS-IS discovery

sends SNMP requests to Juniper devices to discover routing topology objects and their relationships. It supports SNMPv1, v2c, and v3 access to the IS-IS MIB objects that are defined in RFC 1195.
Because the IS-IS MIB is used by Juniper devices but not by Cisco devices,
uses SNMP discovery and SNMP polling to discover and monitor the IS-IS topology for Juniper devices, and uses CLI discovery and CLI polling to discover and monitor the IS-IS topology for Cisco devices. The CLI commands that are invoked for IS-IS discovery are identified in “CLI commands for IS-IS discovery” on page 111, and the CLI commands that are invoked for IS-IS monitoring are identified in the
.
For Juniper devices,
reads the IS-IS MIB objects that are identified in this section to discover the following routing topology objects and their relationships:
  • IS-IS areas
  • IS-IS services
  • IS-IS networks
  • IS-IS interfaces
  • IS-IS neighbor endpoints
  • IS-IS adjacencies
    After discovering and creating the IS-IS topology objects in its repository,
    monitors the status of the IS-IS objects by periodically establishing SNMP sessions to the managed devices and polling the IS-IS MIB objects that are identified in the
    .
    MIB objects accessed for IS-IS discovery lists the discovery IS-IS MIB objects that are accessed by
    .
MIB objects accessed for IS-IS discovery
MIB object
OID
Description
Module
isisISAdjIPAddress
.1.3.6.1.3.37.1.5.3.1.3
One IP Address as reported in IS-IS Hello (IIH) protocol data units (PDUs) that are received from the neighbor.
IS-IS MIB
isisISAdjAreaAddress
.1.3.6.1.3.37.1.5.2.1.2
One Area Address as reported in IIH PDUs that are received from the neighbor.
IS-IS MIB
isisISAdjNeighSysID
.1.3.6.1.3.37.1.5.1.1.5
System ID and 4-byte circuit ID of the neighboring Intermediate System set from the source ID field of the Three-Way-Handshake information from the neighbor’s IIH PDUs.
IS-IS MIB
isisISAdjNeighSysType
.1.3.6.1.3.37.1.5.1.1.4
Type of the neighboring system:
1 (l1IntermediateSystem)
2 (l2IntermediateSystem)
3 (l1l2IntermediateSystem)
4 (Unknown)
IS-IS MIB
isisISAdjNeighPriority
.1.3.6.1.3.37.1.5.1.1.8
Priority of the neighboring Intermediate System for becoming the:
  • LAN Level-1 (L1) Designated Intermediate System (DIS) if the value of isisISAdjNeighSysType is l1IntermediateSystem.
  • LAN Level-2 (L2) DIS if the value of isisISAdjNeighSysType is l2IntermediateSystem.
  • LAN L1L2 DIS if the value of isisISAdjNeighSysType is l1l2IntermediateSystem.
IS-IS MIB
IS-IS object creation shows the mapping between the discovery MIB objects and the creation of the IS-IS objects.
  1. Discovered MIB Objects
  2. isisISAdjIPAddress
  3. Created IS-IS Objects
  4. ISISArea
  5. Created IS-IS Objects
  6. ISISService
  7. isisISAdjAreaAddress
  8. ISISInterface
  9. ISISNeighborEndpoint
  10. isisISAdjNeighSysID
  11. ISISAdjacency
  12. ISISNetwork
  13. (Created from AM-created IPNetwork object)
IS-IS object creation