Smarts IP: How does Smarts build LayeredOver/Underlying relationships for interfaces? Which MIB-2 OID is used to populate the value?

Products

• VMware Smart Assurance

Environment

VMware Smart Assurance - SMARTS

Resolution

This article explains which MIB-2 OID is used to populate the value of layered over and underlying relationships for interfaces, and the logic used to populate the attribute values.

The following OID is used for creating the layering relationship for network adapters:

ifStackOID { ".1.3.6.1.2.1.31.1.2.1.3" }

Indexes:
ifStackHigherLayer
ifStackLowerLayer

The MIB-2 OID provides information on a particular relationship between two sub-layers, specifying that one sub-layer runs on top of the other sub-layer. Each sub-layer
corresponds to a conceptual row in the ifTable.

The file ic-ifmib-stack.asl is responsible for creating the layering.