Cisco Cisco IOS Software Release 12.0(16)S

The MPLS Traffic Engineering MIB provides the following benefits:

Provides a standards-based SNMP interface for retrieving information about MPLS traffic 
engineering.

Provides information about the traffic flows on MPLS traffic engineering tunnels.

Presents MPLS traffic engineering tunnel routes, including the configured route, the IGP calculated 
route, and the actual route traversed.

Provides information, in conjunction with the Interfaces MIB (ifMIB), about how a tunnel was 
rerouted in the event of a link failure.

Provides information about the configured resources used for an MPLS traffic engineering tunnel.

The SNMP agent code supporting the MPLS TE MIB follows the existing model for such code in 
Cisco IOS and is, in part, generated by the Cisco IOS tool set, based on the MIB source code.

The SNMP agent code, which has a layered structure similar to that of the MIB support code in 
Cisco IOS, consists of four layers:

Platform independent layer—This layer is generated primarily by the IOS MIB development tool set 
and incorporates platform and implementation independent functions. The IOS MIB development 
tool set creates a standard set of files associated with a MIB.

Application interface layer—The functions, names, and template code for MIB objects in this layer 
are also generated by the IOS MIB development tool set.

Application specific layer—This layer provides an interface between the application interface layer 
and the API and data structures layer below and performs tasks needed to retrieve required 
information from Cisco IOS, such as searching through data structures. 

API and data structures layer—This layer contains the data structures or APIs within Cisco IOS that 
are retrieved or called in order to set or retrieve SNMP management information.

The following restrictions apply to the MPLS TE MIB for Cisco IOS Release 12.0(16)S:

Supports read-only (RO) permission for MIB objects.

Contains no configuration support by means of SET functions; only SNMP GET, GETNEXT, and 
GETBULK retrieval functions are supported in this release.

Contains no support for TE MIB notifications; Interfaces MIB (ifMIB) notifications are sent when 
tunnel interfaces go up or down.

Contains no support for Guaranteed Bandwidth Traffic Engineering (GBTE) or Auto Bandwidth 
features.

The MPLS TE MIB feature is used in conjunction with the following: