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Entity MIBS
The Entity MIB provides a mechanism for presenting hierarchies of physical entities using SNMP tables.
The Entity MIB contains the following groups, which describe the physical elements and logical elements
of a managed system The following tables are implemented for the MXL switch.
Physical Entity
A physical entity or physical component represents an identifiable physical resource within a managed
system.
Zero or more logical entities may utilize a physical resource at any given time. Determining which
physical components are represented by an agent in the EntPhysicalTable is an implementation-specific
matter. Typically, physical resources (for example, communications ports, backplanes, sensors, daughter-
cards, power supplies, and the overall chassis), which can be managed via functions associated with one
or more logical entities, are included in the MIB.
Containment Tree
Each physical component may be modeled as contained within another physical component.
A containment-tree is the conceptual sequence of entPhysicalIndex values that uniquely specifies the
exact physical location of a physical component within the managed system. It is generated by following
and recording each entPhysicalContainedIn instance up the tree towards the root, until a value of zero
indicating no further containment is found.
Example of the Entity MIBS Outputs
Dell#show inventory optional-module
Unit Slot Expected Inserted Next Boot Power
-----------------------------------------
0 0 QSFP+ QSFP+ AUTO Good
0 1 10GBASE-T 10GBASE-T AUTO Good
1 0 QSFP+ QSFP+ AUTO Good
1 1 10GBASE-T 10GBASE-T AUTO Good
2 0 QSFP+ QSFP+ AUTO Good
2 1 SFP+ SFP+ AUTO Good
The status for the MIBS is as follows:
vijayakrishnan@tapti[3:42pm] : /tftpboot > snmpwalk -c public -v 2c
10.16.130.135
1.3.6.1.2.1.47.1.1.1.1.2
SNMPv2-SMI::mib-2.47.1.1.1.1.2.1 = ""
SNMPv2-SMI::mib-2.47.1.1.1.1.2.2 = STRING: "PowerConnect MXL 10/40GbE"
SNMPv2-SMI::mib-2.47.1.1.1.1.2.3 = STRING: "Module 0"
SNMPv2-SMI::mib-2.47.1.1.1.1.2.4 = STRING: "Unit: 0 Port 1 10G Level"
SNMPv2-SMI::mib-2.47.1.1.1.1.2.5 = STRING: "Unit: 0 Port 2 10G Level"
SNMPv2-SMI::mib-2.47.1.1.1.1.2.6 = STRING: "Unit: 0 Port 3 10G Level"
SNMPv2-SMI::mib-2.47.1.1.1.1.2.7 = STRING: "Unit: 0 Port 4 10G Level"
880
Simple Network Management Protocol (SNMP)