Table Of Contents
Using the IEEE 802.3ad Link Aggregation MIB
First Published: April 21, 2008Last Updated: February 6, 2011
The IEEE 802.3ad Link Aggregation Control Protocol (LACP) enables the bundling of physical interfaces on a physical device to achieve more bandwidth than is available using a single interface. This feature introduces IEEE 802.3ad Link Aggregation (LAG) MIB support in Cisco IOS software. The LAG MIB both supports the management of interfaces and ports that are part of an LACP port channel and is accessed by a Simple Network Manager Protocol (SNMP) manager application.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for Using the IEEE 802.3ad Link Aggregation MIB" section.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Prerequisites for Using the IEEE 802.3ad Link Aggregation MIB
•Link aggregation must be configured using the LACP command-line interface (CLI) commands before the MIB tables can be accessed.
•LACP must be supported in the Cisco IOS image.
Information About Using the IEEE 802.3ad Link Aggregation MIB
IEEE 802.3ad LAG MIB
The IEEE 802.3ad LAG MIB supports the management of interfaces and ports that are part of an LACP port channel. No specific commands are used to enable the MIB; access is through an SNMP manager application. For information about using SNMP in Cisco IOS software, see the "Configuring SNMP Support" chapter of the Cisco IOS Network Management Configuration Guide.
Configuration and Management of LACP bundles
To use the LAG MIB, it is important to know how LACP bundles are configured and managed. For more information about LACP bundles, see the "Configuring IEEE 802.3ad Link Bundling and Load Balancing" chapter of the Cisco IOS Carrier Ethernet Configuration Guide.
LAG MIB Table Object Definitions
This section lists the MIB objects and tables that are supported as part of this feature.
The dot3adTablesLastChanged object indicates the time of the most recent change to the dot3adAggTable, dot3adAggPortListTable, or dot3adAggPortTable.
The dot3adAggTable (Aggregator Configuration table) contains information about every aggregator that is associated with a system. Each LACP channel in a device occupies an entry in the dot3adAggTable. Some objects in the table have restrictions, which are described with the object. The objects are described in Table 1.
The dot3adAggPortListTable (Aggregation Port List table) contains a list of all the ports associated with each aggregator. Each LACP channel in a device occupies an entry in the table. The objects are described in Table 2.
Table 2 Aggregation Port List Table Objects
Object Maximum Access/Description
Write access not supported.
The dot3adAggPortTable (Aggregation Port table) contains LACP configuration information about every aggregation port associated with a device. Each physical port in a device occupies an entry in the dot3adAggPortTable. The objects are described in Table 3.
The dot3adAggPortStatsTable (LACP Statistics table) contains link aggregation information about every port that is associated with a device. Each physical port occupies a row in the table. The objects are described in Table 4.
Related Topic Document Title
Link aggregation configuration tasks
"Configuring IEEE 802.3ad Link Bundling and Load Balancing" chapter of the Cisco IOS Carrier Ethernet Configuration Guide
Cisco IOS LACP commands
"Configuring SNMP Support" chapter of the Cisco IOS Network Management Configuration Guide
Cisco IOS SNMP commands
Cisco IOS commands: master list of commands with complete command syntax, command mode, command history, defaults, usage guidelines, and examples
MIB MIBs Link
•IEEE 802.3ad MIB
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature
Feature Information for Using the IEEE 802.3ad Link Aggregation MIB
Table 5 lists the release history for this feature.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note Table 5 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
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