EQLISCSI-MIB

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Organization: EqualLogic Inc.

Last Updated: 2014-03-12

Category: Domain: Storage, Protocol: iSCSI, Vendor: Dell/DNOS, Vendor: EqualLogic/Dell

Description: Dell EqualLogic iSCSI MIB (EQLVOLUME-MIB) providing comprehensive volume, target, and initiator management for iSCSI storage arrays.

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What Is EQLISCSI-MIB?

EQLISCSI-MIB is a Dell EqualLogic proprietary augmentation of the standard iSCSI MIB, purpose-built to manage iSCSI session, connection, and initiator/target relationships on EqualLogic PS Series storage arrays. It exposes data about active iSCSI sessions, per-session error counters, throughput totals, and multipathing/load balancing state across the storage array's network interfaces. This makes it a key MIB for monitoring the software status of the storage array's iSCSI target stack, revealing session uptime, error accumulation, and per-session data volumes that indicate degraded connectivity or an overloaded array controller. It explicitly augments the standard ISCSI-MIB, layering EqualLogic-specific counters on top of the IETF iSCSI object model. It is used in SAN deployments to track initiator-to-target session health across hosts connected to EqualLogic arrays. Engineers can download the EQLISCSI-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in EQLISCSI-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

Dell EqualLogic PS Series iSCSI storage array

Monitoring Examples

An operator would poll eqliscsiSessionStatsTable/eqliscsiSessionStatsEntry for eqliscsiSsnErrorCount and eqliscsiSsnTimeUp to spot a session that keeps resetting (high error count with low uptime), which usually points to a flaky NIC or a storage network problem. eqliscsiSsnTotalDataTrnsfrd and eqliscsiSsnTotalDataTrnsfrd64 give cumulative bytes transferred per session to identify which initiators are driving the heaviest load. eqliscsiSsnLoadValue is checked to see if EqualLogic's load-balancing has skewed sessions onto one array member, and eqliscsiSessionAttributesTable is consulted alongside eqliscsiNodeUuid to map a session back to its initiator.

What Can Be Monitored

iSCSI session uptime
session error counts
cumulative data transferred per session
session load balancing value
initiator/target session attributes

Imported Objects

From EQUALLOGIC-SMI

equalLogic

MODULE-IDENTITY

From ISCSI-MIB

iscsiSessionAttributesEntry	OBJECT-TYPE
iscsiSessionStatsEntry	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-IDENTITY
OBJECT-TYPE
Opaque
TimeTicks
Unsigned32
enterprises
experimental

From SNMPv2-TC

DisplayString
TruthValue

How to Use in IPNetwork Monitor

Example using eqliscsiSsnErrorCount OID:

Select a Dell EqualLogic iSCSI storage array 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 eqliscsiSsnErrorCount 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. The number of errors encountered since this session was established. 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 a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
eqliscsiExtModule	1.3.6.1.4.1.12740.11			Equallogic Inc augmented ISCSI MIB module.
eqliscsiExtObjects	1.3.6.1.4.1.12740.11.1
eqliscsiSessionStatsTable	1.3.6.1.4.1.12740.11.1.1		not-accessible	A Dynamic list of general iSCSI traffic counters for each of the sessions present on the system.
eqliscsiSessionStatsEntry	1.3.6.1.4.1.12740.11.1.1.1		not-accessible	An entry (row) containing general iSCSI traffic counters for a particular session.
C32 eqliscsiSsnErrorCountEx	1.3.6.1.4.1.12740.11.1.1.1.1	Counter32	read-only	The number of errors encountered since this session was established
C32 eqliscsiSsnTimeUp	1.3.6.1.4.1.12740.11.1.1.1.2	Counter32	read-only	The time in ticks that has elapsed since this session was first established with the iSCSI target
C32 eqliscsiSsnTotalDataTrnsfrd	1.3.6.1.4.1.12740.11.1.1.1.3	Counter32	read-only	The amount of data transfered for this session in Kilobytes. This number is determined by the sum of the inbound and outbound traffic counters.
OCT eqliscsiNodeUuid	1.3.6.1.4.1.12740.11.1.1.1.4	OCTET STRING	read-only	The UUID of the iscs
C64 eqliscsiSsnTotalDataTrnsfrd64	1.3.6.1.4.1.12740.11.1.1.1.5	Counter64	read-only	The amount of data transfered for this session in Kilobytes. This number is determined by the sum of the inbound and outbound traffic counters.
OPA eqliscsiSsnMembers	1.3.6.1.4.1.12740.11.1.1.1.6	Opaque	read-only	List of eligible member id's. This is sizeof(uint32_t) * pss_max_num_grp_members defined in pss_constants.h
OPA eqliscsiSsnRouteStats	1.3.6.1.4.1.12740.11.1.1.1.7	Opaque	read-only	Array of the percentage of traffic being routed to each member. This is a 1 to 1 relationship to the Members array. This is sizeof(uint32_t) * pss_max_num_grp_members defined in pss_constants.h
U32 eqliscsiSsnLoadValue	1.3.6.1.4.1.12740.11.1.1.1.8	Unsigned32	read-only	Calculated value of how busy this connection is. 0 is 100% busy, 100 is 0% busy
eqliscsiSessionAttributesTable	1.3.6.1.4.1.12740.11.1.2		not-accessible	EqualLogic-Dynamic A Dynamic list of general iSCSI connection attributes for connections present on the system.
eqliscsiSessionAttributesEntry	1.3.6.1.4.1.12740.11.1.2.1		not-accessible	An entry (row) containing general iSCSI connection attributes.
INT eqliscsiSessionAttributesType	1.3.6.1.4.1.12740.11.1.2.1.1	INTEGER	read-only	Describes the src initiator of the connection as external to the array group, or one of various connection types between group members.

RFC description

Manages iSCSI storage resources on Dell EqualLogic iSCSI storage arrays. Provides monitoring and configuration of iSCSI connections, volumes, RAID groups, and storage pool management for networked storage systems.

Start monitoring Dell EqualLogic iSCSI storage arrays 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 EQLISCSI-MIB