Cisco Cisco IOS Software Release 12.2(33)SRE

The interrelation of entries in the ifTable is defined by the interfaces stack group of the Interfaces Group 
MIB. 

 shows how the stack table might appear for MPLS interfaces. The underlying layer refers 

to any interface that is defined for MPLS internetworking, for example, ATM, Frame Relay, or Ethernet. 

Tunnel interfaces are included in the MPLS list for the current implementation. 

MIB structure is represented by a tree hierarchy. Branches along the tree have short text strings and 
integers to identify them. Text strings describe object names, and integers allow computer software to 
encode compact representations of the names. 

The MPLS-LSR-STD-MIB falls on the branch of the Internet MIB hierarchy represented by the object 
identifier 1.3.6.1.2.1.10.166. This branch can also be represented by its object name 
iso.org.dod.internet.mgmt.mib-2.transmission.mplsStdMIB. The MPLS-LSR-STD-MIB is identified by 
the object name mplsLsrStdMIB, which is denoted by the number 2. Therefore, objects in the 
MPLS-LSR-MIB can be identified in either of the following ways:

The object identifier—1.3.6.1.2.1.10.166.2.[MIB-variable]

The object name— 
iso.org.dod.internet.mgmt.mib-2.transmission.mplsStdMIB.mplsLsrStdMIB.[MIB-variable]

To display a MIB-variable, you enter an SNMP get command with an object identifier. Object identifiers 
are defined by the MPLS-LSR-STD-MIB.

 shows the position of the MPLS-LSR-STD-MIB in the Internet MIB hierarchy.

MPLS-interface ifType = mpls(166)

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Underlying Layer . . .