BAY-STACK-LINK-STATE-TRACKING-MIB

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Organization: Avaya

Last Updated: 2013-10-11

Category: Vendor: Avaya

Description: Manages link-state tracking groups for upstream/downstream port correlation on Avaya/Nortel ERS switches.

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What Is BAY-STACK-LINK-STATE-TRACKING-MIB?

BAY-STACK-LINK-STATE-TRACKING-MIB is a proprietary Avaya/Nortel (BayStack/Ethernet Routing Switch) extension implementing Link State Tracking (LST), a feature that binds the link state of downstream ports to upstream ports so a failure on one propagates to the others. It exposes configuration group tables (group index, enable flag, upstream/downstream port and MLT membership lists) alongside operational status objects and SNMP notifications. Its main monitoring value is tracking the real-time hardware link/port health of an LST group via the group's operational state, revealing whether an upstream link failure has correctly forced its bound downstream ports down (e.g., for server NIC teaming failover). It relies on standard interface indices from IF-MIB and sits within the Avaya/Nortel BayStack private MIB tree alongside other switch-management MIBs. It is typically deployed on Avaya/Nortel Ethernet Routing Switches in access/aggregation layers to protect server or blade-chassis uplink redundancy. Engineers can download the BAY-STACK-LINK-STATE-TRACKING-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BAY-STACK-LINK-STATE-TRACKING-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

Avaya/Nortel Ethernet Routing Switch (BayStack/ERS series)

Monitoring Examples

An admin walks bsLstGroupTable/bsLstGroupEntry, reading bsLstGroupOperState for each bsLstGroupIndex to confirm the group is Up, while bsLstGroupUpstreamPortList/bsLstGroupUpstreamMltList and bsLstGroupDownstreamPortList/bsLstGroupDownstreamMltList show which physical ports or MLTs are bound together. A change of bsLstGroupOperState to down, or a bsLstNotifications trap firing, reveals an upstream link failure that should have shut down all mapped downstream ports to trigger NIC failover on an attached server.

What Can Be Monitored

link-state tracking group operational state
upstream port/MLT membership
downstream port/MLT membership
group enable/disable state
group index configuration

Imported Objects

From IF-MIB

ifIndex

OBJECT-TYPE

From Q-BRIDGE-MIB

PortList

From RAPID-CITY

IdList

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TruthValue

From SYNOPTICS-ROOT-MIB

bayStackMibs

OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using bsLstGroupOperState OID:

Select an Avaya/Nortel BayStack Ethernet Routing Switch (ERS) (legacy) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type bsLstGroupOperState into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. This object specifies the operational status of this group instance. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is anything other than 'up', since that indicates the condition this object reports has changed to one worth investigating. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
bayStackLinkStateTrackingMib	1.3.6.1.4.1.45.5.43			This MIB module is used for Link State Tracking configuration. The purpose of Link-state tracking feature is to bind the link state of multiple interfaces, by creating link-state groups with upstream and downstream interfaces.
bsLstNotifications	1.3.6.1.4.1.45.5.43.0
NTF bsLstInterfaceStatusChanged	1.3.6.1.4.1.45.5.43.0.1			This notification is generated when a physical or logical interface changes its status in a particular link-state tracking group.
NTF bsLstGroupOperStateChanged	1.3.6.1.4.1.45.5.43.0.2			This notification is generated when the operational status of a link-state tracking group changes due to an interface status change. For example, when the last interface of an link-state tracking group becomes down, the operational status of the group changes to down.
bsLstObjects	1.3.6.1.4.1.45.5.43.1
bsLstScalars	1.3.6.1.4.1.45.5.43.1.1
bsLstGroupTable	1.3.6.1.4.1.45.5.43.1.2		not-accessible	This table is used to configure link-state tracking group settings.
bsLstGroupEntry	1.3.6.1.4.1.45.5.43.1.2.1		not-accessible	An entry for this instance of bsLstGroupTable.
U32 bsLstGroupIndex	1.3.6.1.4.1.45.5.43.1.2.1.1	Unsigned32	read-only	The link-state tracking group id.
T/F bsLstGroupEnabled	1.3.6.1.4.1.45.5.43.1.2.1.2	TruthValue	read-write	This object controls whether this link-state tracking group is enabled.
POR bsLstGroupUpstreamPortList	1.3.6.1.4.1.45.5.43.1.2.1.3	PortList	read-write	This object specifies the upstream port list for this group instance.
POR bsLstGroupDownstreamPortList	1.3.6.1.4.1.45.5.43.1.2.1.4	PortList	read-write	This object specifies the downstream port list for this group instance.
IDL bsLstGroupUpstreamMltList	1.3.6.1.4.1.45.5.43.1.2.1.5	IdList	read-write	This object specifies the upstream mlt list for this group instance. Each MLT ID is stored as a two bytes value. The first byte in the pair holds bits 15-8 of the MLT ID, while the second byte holds bits 7-0 of the MLT ID.
IDL bsLstGroupDownstreamMltList	1.3.6.1.4.1.45.5.43.1.2.1.6	IdList	read-write	This object specifies the downstream mlt list for this group instance. Each MLT ID is stored as a two bytes value. The first byte in the pair holds bits 15-8 of the MLT ID, while the second byte holds bits 7-0 of the MLT ID.
INT bsLstGroupOperStateEx	1.3.6.1.4.1.45.5.43.1.2.1.7	INTEGER	read-only	This object specifies the operational status of this group instance. When this link-state tracking group is disabled, the value of this object must be 'notConfigured(3)'.
bsLstNotifObjects	1.3.6.1.4.1.45.5.43.1.3
INT bsLstInterfaceStatus	1.3.6.1.4.1.45.5.43.1.3.1	INTEGER	accessible-for-notify	This object specifies the status of a physical or logical interface.

RFC description

Manages link state tracking groups to bind multiple interface states for network redundancy and failover on Avaya switches.

Start monitoring Avaya/Nortel BayStack Ethernet Routing Switch (ERS) (legacy) 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 BAY-STACK-LINK-STATE-TRACKING-MIB