RBN-MC-LAG-MIB

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Organization: Ericsson AB.

Last Updated: 2016-04-11

Category: Link Aggregation, Vendor: Ericsson

Description: Manages multi-chassis link aggregation group (MC-LAG) configuration and inter-chassis synchronization on Ericsson SmartEdge BRAS.

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What Is RBN-MC-LAG-MIB?

RBN-MC-LAG-MIB is an Ericsson (Redback) SmartEdge enterprise MIB, derived from RBN-LAG-MIB, that manages Multi-Chassis Link Aggregation Groups (MC-LAG) spanning two physically separate chassis for redundancy. It exposes configuration objects such as system priority, system MAC address, and revertive-mode/hold-timer settings, alongside operational status objects covering current operational state, error codes, and switchover history. This directly supports monitoring of the software/control-plane health of a redundant link-aggregation pair: administrators can detect an unplanned MC-LAG switchover, its cause, and how long it took, which are strong indicators of a peer-chassis or link failure. It builds conceptually on IEEE 802.1AX (formerly 802.3ad) link aggregation standards, adapted for a multi-chassis/cross-box topology in Ericsson's enterprise MIB tree. It is deployed in SmartEdge access/edge deployments requiring chassis-level redundancy, where RBN-MC-LAG-MIB SNMP monitoring is standard for subscriber-facing aggregated links.

IPNetwork Monitor allows you to monitor SNMP objects defined in RBN-MC-LAG-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

Ericsson/Redback SmartEdge BRAS
SmartEdge multi-chassis redundant edge router pair

Monitoring Examples

An operator polls rbnMcLagTable/rbnMcLagEntry keyed by rbnMcLagId to check rbnMcLagOperState for each rbnMcLagName, and inspects rbnMcLagOperErrorCode when a group is not fully operational. A trap-driven workflow watches rbnMcLagSwitchOverTime and rbnMcLagSwitchOverReason to alert when the active chassis fails over, and rbnMcLagRevertiveMode/rbnMcLagRevertiveHoldTimer settings determine whether traffic reverts automatically once the primary chassis recovers.

What Can Be Monitored

MC-LAG operational state
switchover time and reason
operational error code
system priority/MAC
revertive mode and hold timer

Imported Objects

From IF-MIB

InterfaceIndex

From RBN-SMI

rbnMgmt

OBJECT-IDENTITY

From RBN-TC

RbnPort
RbnSlot

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DateAndTime
MacAddress
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
rbnMcLagMIB	1.3.6.1.4.1.2352.2.102			Creating new file with same renamed contents from RBN-LAG-MIB.my. Renaming: Lag to McLag.
rbnMcLagNotifications	1.3.6.1.4.1.2352.2.102.0
NTF rbnMcLagSwitchOverEvent	1.3.6.1.4.1.2352.2.102.0.1			An MC-LAG switch-over trap indicates that a switch-over has happened and also it identifies which LAG will become active LAG.
NTF rbnMcLagOperFailed	1.3.6.1.4.1.2352.2.102.0.2			This trap indicates an MC-LAG has failed and why.
NTF rbnMcLagOperFailureCleared	1.3.6.1.4.1.2352.2.102.0.3			This trap indicates an MC-LAG has recovered from a failure.
NTF rbnMcLagConstituentPortUp	1.3.6.1.4.1.2352.2.102.0.4			This trap indicates whether LACP on a constituent link is active in a LAG of an MC-LAG.
NTF rbnMcLagConstituentPortDown	1.3.6.1.4.1.2352.2.102.0.5			This trap indicates whether LACP on a constituent link has failed in a LAG of an MC-LAG.
rbnMcLagObjects	1.3.6.1.4.1.2352.2.102.1
rbnMcLagTable	1.3.6.1.4.1.2352.2.102.1.1		not-accessible	This table consists of MC-LAG management objects.
rbnMcLagEntry	1.3.6.1.4.1.2352.2.102.1.1.1		not-accessible	Each entry contains management objects of an MC-LAG node.
STR rbnMcLagName	1.3.6.1.4.1.2352.2.102.1.1.1.1	SnmpAdminString	not-accessible	This string name uniquely identifies an MC-LAG within an MC-LAG cluster. Within an MC-LAG cluster, there could not be two LAG with the same name on the same chassis. The MC-LAGs with the same name on different chassis are peer to each other.
I32 rbnMcLagId	1.3.6.1.4.1.2352.2.102.1.1.1.2	Integer32	read-only	The identifier is assigned to a LAG on individual chassis at the time of LAG configuration. This identifier could be different between LAG in the same MC-LAG. There is no coordination between the two id manager on the two chassis in assigning the LAG ID on different chassis.
I32 rbnMcLagSystemPriority	1.3.6.1.4.1.2352.2.102.1.1.1.3	Integer32	read-only	This is a configurable value. The system priority will form part of the link-group system id. System priority priority will occupy the last 32 bit of the system-id.
MAC rbnMcLagSystemMacAddress	1.3.6.1.4.1.2352.2.102.1.1.1.4	MacAddress	read-only	The .
T/F rbnMcLagRevertiveMode	1.3.6.1.4.1.2352.2.102.1.1.1.5	TruthValue	read-only	This boolean value indicates whether revertive mode is set for an MC-LAG. If revertive mode is set, the LAG with higher priority starts the revertive process once it recovers from some failures to a state where it has regained capacity to take over as the active LAG of an MC-LAG.
I32 rbnMcLagRevertiveHoldTimer	1.3.6.1.4.1.2352.2.102.1.1.1.6	Integer32	read-only	This is a configurable value in revertive mode. If this value is configured, the LAG with higher priority will hold off for the seconds configured by the value before starting the revertive procedure.
INT rbnMcLagOperState	1.3.6.1.4.1.2352.2.102.1.1.1.7	INTEGER	read-only	The current MC-LAG state: Up - When the MC-LAG is active on one of the two chassis. In this state, the traffic are flowing through the active LAG. Down - When the MC-LAG is down, the LAG is not in a position to take over as active LAG of an MC-LAG. Standby - When the MC-LAG is standby, the LAG is ready to take over as the active LAG fails.
INT rbnMcLagOperErrorCode	1.3.6.1.4.1.2352.2.102.1.1.1.8	INTEGER	read-only	The reason that MC-LAG is Down. configMismatch - MC-LAG is down because LAG related configuration is not the same between the two LAGs in an MC-LAG. priorityError - MC-LAG is down because the configured port priority values between the two LAGs of an MC-LAG are ambiguous as to which LAG is higher in priority. downMinLink - MC-LAG is down because the LAG doesn't have enough links that are up to satisfy the configured minimum link requirement.
DAT rbnMcLagSwitchOverTime	1.3.6.1.4.1.2352.2.102.1.1.1.9	DateAndTime	read-only	This indicated the last time MC-LAG was switched-over.
STR rbnMcLagSwitchOverReason	1.3.6.1.4.1.2352.2.102.1.1.1.10	SnmpAdminString	read-only	This indicate in text the reason for MC-LAG switchover.
rbnMcLagConstituentTable	1.3.6.1.4.1.2352.2.102.1.2		not-accessible	This is a table of constituent links for a LAG
rbnMcLagConstituentEntry	1.3.6.1.4.1.2352.2.102.1.2.1		not-accessible	A constituent link of an MCLAG. A constituent link is uniquely identified by a slot, port, and port priority.
STR rbnMcLagConstituentName	1.3.6.1.4.1.2352.2.102.1.2.1.1	SnmpAdminString	not-accessible	This string name uniquely identifies an MC-LAG within an MC-LAG cluster. Within an MC-LAG cluster, there could not be two LAG with the same name on the same chassis. The MC-LAGs with the same name on different chassis are peer to each other.
RBN rbnMcLagConstituentSlot	1.3.6.1.4.1.2352.2.102.1.2.1.2	RbnSlot	not-accessible	This indicates the slot number of the constituent link.
RBN rbnMcLagConstituentPort	1.3.6.1.4.1.2352.2.102.1.2.1.3	RbnPort	not-accessible	This indicates the port number of the constituent link.
I32 rbnMcLagConstituentPortPriority	1.3.6.1.4.1.2352.2.102.1.2.1.4	Integer32	read-only	This indicates the configured priority of the constituent link.
NUM rbnMcLagConstituentPortIfIndex	1.3.6.1.4.1.2352.2.102.1.2.1.5	InterfaceIndex	read-only	The hardware interface index associated with the constituent link.
INT rbnMcLagConstituentLACPErrorCode	1.3.6.1.4.1.2352.2.102.1.2.1.6	INTEGER	read-only	The reason LACP on a constituent is down. portFailure - LACP is down because the consitutent port is down. ccmFailure - LACP is down because the ccm is down. bfdFailure - LACP is down because bfd is down.
rbnMcLagConformance	1.3.6.1.4.1.2352.2.102.2
rbnMcLagGroups	1.3.6.1.4.1.2352.2.102.2.1
rbnMcLagObjectGroup	1.3.6.1.4.1.2352.2.102.2.1.1			Collection of scalar objects required for Multi-chassis Link-group management.
rbnMcLagNotificationGroup	1.3.6.1.4.1.2352.2.102.2.1.2			Objects required for Multi-chassis Link-group notifications.
rbnMcLagCompliances	1.3.6.1.4.1.2352.2.102.2.2
rbnMcLagModuleCompliance	1.3.6.1.4.1.2352.2.102.2.2.1			Compliance statement for agents that provide support for the RBN-MC-LAG-MIB

RFC description

Multi-Chassis Link Aggregation Group (MC-LAG) management for Ericsson systems, monitoring LAG state and constituent circuit changes.

Start monitoring Ericsson (Redback) SmartEdge multi-chassis redundant edge router pair (MC-LAG) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download RBN-MC-LAG-MIB

What Is RBN-MC-LAG-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description