CISCO-ETHERLIKE-EXT-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2010-06-04

Category: Cisco Devices, Network Interfaces

Description: Extends the standard EtherLike-MIB with Cisco-specific objects for additional Ethernet interface statistics and configuration.

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What Is CISCO-ETHERLIKE-EXT-MIB?

CISCO-ETHERLIKE-EXT-MIB is a Cisco extension to the standard IETF EtherLike-MIB, adding objects for Ethernet-like interfaces that are either omitted from the standard MIB or specific to Cisco hardware. It provides configuration and operational data on 802.3 flow-control (pause frames) and on Ethernet sub-interfaces, including per-interface admin/oper pause mode and sub-interface counts. From a monitoring standpoint it is primarily used to check interface-level configuration and operational health: whether flow control is administratively enabled versus actually negotiated/operating, and how many logical sub-interfaces exist on a physical Ethernet port, which can indicate misconfiguration or unexpected sub-interface proliferation. It explicitly complements the standard IETF EtherLike-MIB, depending on that MIB for baseline Ethernet statistics while adding Cisco-only detail. It is deployed on Cisco switches and routers with Ethernet interfaces where administrators need finer-grained visibility into pause-frame behavior and sub-interface structure than the standard MIB provides. Engineers can download the CISCO-ETHERLIKE-EXT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-ETHERLIKE-EXT-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Cisco switches and routers with Ethernet/Ethernet-like interfaces

Monitoring Examples

An engineer troubleshooting a duplex/flow-control mismatch would poll ceeDot3PauseExtTable/ceeDot3PauseExtEntry to compare ceeDot3PauseExtAdminMode against ceeDot3PauseExtOperMode on a given port, spotting cases where pause frames were configured but failed to negotiate with the link partner. Polling ceeSubInterfaceTable's ceeSubInterfaceCount per physical interface would reveal an unexpectedly high number of sub-interfaces on a trunk port, which could point to a scripting error or unauthorized VLAN sub-interface creation. This data is typically cross-referenced against standard IF-MIB interface counters for full-picture Ethernet link diagnostics.

What Can Be Monitored

802.3 pause (flow control) admin mode
802.3 pause operational mode
sub-interface count per physical Ethernet interface

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From EtherLike-MIB

dot3StatsIndex

OBJECT-TYPE

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoEtherExtMIB	1.3.6.1.4.1.9.9.645			The MIB module to describe generic objects for ethernet-like network interfaces. This MIB provides ethernet-like network interfaces information that are either excluded by EtherLike-MIB or specific to Cisco products.
ciscoEtherExtMIBNotifs	1.3.6.1.4.1.9.9.645.0
ciscoEtherExtMIBObjects	1.3.6.1.4.1.9.9.645.1
ceeDot3PauseExt	1.3.6.1.4.1.9.9.645.1.1
ceeDot3PauseExtTable	1.3.6.1.4.1.9.9.645.1.1.1		not-accessible	A list of additional descriptive and status information about the MAC Control PAUSE function on the ethernet-like interfaces attached to a particular system, in extension to dot3PauseTable in EtherLike-MIB. There will be one row in this table for each ethernet-like interface in the system which supports the MAC Control PAUSE function.
ceeDot3PauseExtEntry	1.3.6.1.4.1.9.9.645.1.1.1.1		not-accessible	An entry in the table, containing additional information about the MAC Control PAUSE function on a single ethernet-like interface, in extension to dot3PauseEntry in Etherlike-MIB.
BIT ceeDot3PauseExtAdminMode	1.3.6.1.4.1.9.9.645.1.1.1.1.1	Bits	read-write	Indicates preference to send or process pause frames on this interface. txDesired(0) - indicates preference to send pause frames, but autonegotiates flow control. This bit can only be turned on when the corresponding instance of dot3PauseAdminMode has the value of 'enabledXmit' or 'enabledXmitAndRcv'. rxDesired(1) - indicates preference to process pause frames, but autonegotiates flow control. This bit can only be turned on when the corresponding instance of dot3PauseAdminMode has the value of 'enabledRcv' or 'enabledXmitAndRcv'.
BIT ceeDot3PauseExtOperMode	1.3.6.1.4.1.9.9.645.1.1.1.1.2	Bits	read-only	Provides additional information about the flow control operational status on this interface. txDisagree(0) - the transmit pause function on this interface is disabled due to disagreement from the far end on negotiation. rxDisagree(1) - the receive pause function on this interface is disabled due to disagreement from the far end on negotiation. txDesired(2) - the transmit pause function on this interface is desired. rxDesired(3) - the receive pause function on this interface is desired.
ceeSubIf	1.3.6.1.4.1.9.9.645.1.2
ceeSubInterfaceTable	1.3.6.1.4.1.9.9.645.1.2.1		not-accessible	This table provides the subinterface related information associated to the Ethernet-like interfaces. The subinterface is a division of one physical interface into multiple logical interfaces. As an example of what a typical subinterface setup might look like on a device, a single Ethernet port such as GigabitEthernet0/0 would be subdivided into Gi0/0.1, Gi0/0.2, Gi0/0.3 and so on, each one performing as if it were a separate interface.
ceeSubInterfaceEntry	1.3.6.1.4.1.9.9.645.1.2.1.1		not-accessible	This table contains a row for each Ethernet-like interface by it's ifTable ifIndex in the system, which supports the sub-interface. An entry is created by an agent, when it detects a Ethernet-like interface is created in ifTable and it can support sub-interface. An entry is deleted by an agent, when the ifTable entry associated to the Ethernet-like interface is deleted. Typically, when the card is removed from the device.
U32 ceeSubInterfaceCount	1.3.6.1.4.1.9.9.645.1.2.1.1.1	Unsigned32	read-only	This object represents the number of subinterfaces created on a Ethernet-like interface.
ciscoEtherExtMIBConform	1.3.6.1.4.1.9.9.645.2
ceeEtherExtMIBCompliances	1.3.6.1.4.1.9.9.645.2.1
ceeEtherExtMIBCompliance	1.3.6.1.4.1.9.9.645.2.1.1			The compliance statement for CISCO-ETHERLIKE-EXT-MIB.
ceeEtherExtMIBComplianceR01	1.3.6.1.4.1.9.9.645.2.1.2			The compliance statement for CISCO-ETHERLIKE-EXT-MIB. This deprecates ceeEtherExtMIBCompliance.
ceeEtherExtMIBGroups	1.3.6.1.4.1.9.9.645.2.2
ciscoEtherExtPauseGroup	1.3.6.1.4.1.9.9.645.2.2.1			A collection of objects providing the additional information for the control of the MAC Control PAUSE function on ethernet-like network interfaces.
ciscoEtherExtSubIfGroup	1.3.6.1.4.1.9.9.645.2.2.2			A collection of objects providing the Ethernet-like subinterface information.

RFC description

Cisco extensions to EtherLike-MIB providing ethernet interface statistics and flow control monitoring.

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Download CISCO-ETHERLIKE-EXT-MIB

What Is CISCO-ETHERLIKE-EXT-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description