T11-FC-VIRTUAL-FABRIC-MIB

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Organization: IETF IMSS (Internet and Management Support for Storage) Working Group

Last Updated: 2006-11-10

Category: Fibre Channel and Storage

Description: Defines managed objects for Fibre Channel Virtual Fabrics, managing the relationship between Core Switches and Virtual Switches.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring T11-FC-VIRTUAL-FABRIC-MIB with a free 30-day trial of IPNetwork Monitor.

What Is T11-FC-VIRTUAL-FABRIC-MIB?

T11-FC-VIRTUAL-FABRIC-MIB is a vendor-neutral, standards-based IETF MIB (RFC 4747, from the T11 Fibre Channel committee) for managing Virtual Fabrics, a Fibre Channel feature that partitions a physical switch fabric into multiple logically isolated fabrics. It exposes a t11vfCoreSwitchTable describing the physical core switch and its virtual-fabric capacity, a t11vfVirtualSwitchTable mapping each virtual fabric (by VfId) to its core switch with a row-status-controlled lifecycle, and a t11vfPortTable assigning physical ports to virtual switches. Its monitoring focus is configuration and topology state: confirming how many virtual fabrics a core switch supports versus how many are configured, whether a virtual switch's row is active, and which ports belong to which virtual fabric, useful for detecting misconfigured or orphaned virtual fabric assignments rather than hardware sensor faults. It is explicitly defined per the FC-SW/Virtual Fabric standard and is designed to be used alongside other T11 Fibre Channel fabric-element MIBs. It is deployed in multi-tenant or segmented SAN environments where Fibre Channel switches/directors support Virtual Fabric partitioning. Engineers implementing or auditing this functionality typically reference the T11-FC-VIRTUAL-FABRIC-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in T11-FC-VIRTUAL-FABRIC-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

vendor-neutral, standards-based MIB (IETF RFC 4747 / T11 FC-SW)
Fibre Channel switches/directors supporting Virtual Fabrics

Monitoring Examples

An administrator would poll t11vfCoreSwitchTable to check t11vfCoreSwitchMaxSupported against the number of entries in t11vfVirtualSwitchTable to confirm a physical switch hasn't exceeded its virtual fabric capacity. Checking t11vfVirtualSwitchEntry's t11vfVirtualSwitchRowStatus for each t11vfVirtualSwitchVfId confirms whether a given virtual fabric is active or was left in a notReady/notInService state after a failed provisioning attempt. Cross-referencing t11vfPortTable reveals which physical ports are mapped to which virtual switch, useful for auditing a port that unexpectedly ended up in the wrong virtual fabric.

What Can Be Monitored

virtual fabric capacity vs. configured count
virtual switch row/provisioning status
core switch to virtual switch mapping
port-to-virtual-fabric assignment

Imported Objects

From FC-MGMT-MIB

FcNameIdOrZero
fcmInstanceIndex	OBJECT-TYPE
fcmPortEntry	OBJECT-TYPE
fcmSwitchEntry	OBJECT-TYPE

From IF-MIB

InterfaceIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
mib-2

From SNMPv2-TC

RowStatus
StorageType

From T11-TC-MIB

T11FabricIndex

OIDs

OID symbolic	OID numeric	Type	Access	Description
t11FcVirtualFabricMIB	1.3.6.1.2.1.147			This module defines management information specific to Fibre Channel Virtual Fabrics. A Virtual Fabric is a Fabric composed of partitions of switches, links and N_Ports with a single Fabric management domain, Fabric Services and independence from other Virtual Fabrics. Copyright (C) The IETF Trust (2006). This version of this MIB module is part of RFC 4747; see the RFC itself for full legal notices.
t11vfObjects	1.3.6.1.2.1.147.1
t11vfCoreSwitchTable	1.3.6.1.2.1.147.1.1		not-accessible	A table of core switches supported by the current management entity.
t11vfCoreSwitchEntry	1.3.6.1.2.1.147.1.1.1		not-accessible	Each entry represents one core switch.
FCN t11vfCoreSwitchSwitchName	1.3.6.1.2.1.147.1.1.1.1	FcNameIdOrZero	not-accessible	The Core Switch_Name (WWN) of this Core Switch.
U32 t11vfCoreSwitchMaxSupported	1.3.6.1.2.1.147.1.1.1.2	Unsigned32	read-write	In switches that do not support Virtual Fabrics, this object has the value of 1. If Virtual Fabrics are supported, this object is the maximum number of Virtual Fabrics supported by the Core Switch. For the purpose of this count, the Control VF_ID is ignored.
STO t11vfCoreSwitchStorageType	1.3.6.1.2.1.147.1.1.1.3	StorageType	read-write	The storage type for this conceptual row. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row.
t11vfVirtualSwitchTable	1.3.6.1.2.1.147.1.2		not-accessible	A table of Virtual Switches. When one Core Switch provides switching functions for multiple Virtual Fabrics, that Core Switch is modeled as containing multiple Virtual Switches, one for each Virtual Fabric. This table contains one row for every Virtual Switch on every Core Switch. This table augments the basic switch information in the fcmSwitchTable Table in the FC-MGMT-MIB.
t11vfVirtualSwitchEntry	1.3.6.1.2.1.147.1.2.1		not-accessible	An entry of the Virtual Switch table. Each row is for a Virtual Switch. This table augments the fcmSwitchTable, i.e., every entry in this table has a one-to-one correspondence with an entry in the fcmSwitchTable. At the time when the fcmSwitchTable was defined, it applied to physical switches. With the definition and usage of virtual switches, fcmSwitchTable now applies to virtual switches as well as physical switches, and (in contrast to physical switches) it is appropriate to provide the capability for virtual switches to be created via remote management applications, e.g., via SNMP. So, this entry contains a RowStatus object (to allow the creation of a virtual switch), as well as a StorageType object. Obviously, if a row is created/deleted in this table, the corresponding row in the fcmSwitchTable will be created/deleted.
T11 t11vfVirtualSwitchVfId	1.3.6.1.2.1.147.1.2.1.1	T11FabricIndex	read-create	The VF_ID of the Virtual Fabric for which this virtual switch performs its switching function. The Control VF_ID is implicitly enabled and is not set. Communication with the Control VF_ID is required.
FCN t11vfVirtualSwitchCoreSwitchName	1.3.6.1.2.1.147.1.2.1.2	FcNameIdOrZero	read-only	The Core Switch_Name (WWN) of the Core Switch that contains this Virtual Switch.
ROW t11vfVirtualSwitchRowStatus	1.3.6.1.2.1.147.1.2.1.3	RowStatus	read-create	The status of this row.
STO t11vfVirtualSwitchStorageType	1.3.6.1.2.1.147.1.2.1.4	StorageType	read-create	The storage type for this conceptual row. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row.
t11vfPortTable	1.3.6.1.2.1.147.1.3		not-accessible	A table of Port attributes related to Virtual Fabrics.
t11vfPortEntry	1.3.6.1.2.1.147.1.3.1		not-accessible	Each entry represents a physical Port on a switch. Switches that support Virtual Fabrics would add these four additional columns to the fcmPortEntry row.
T11 t11vfPortVfId	1.3.6.1.2.1.147.1.3.1.1	T11FabricIndex	read-write	The Port VF_ID assigned to this Port. The Port VF_ID is the default Virtual Fabric that is assigned to untagged frames arriving at this Port. The Control VF_ID is implicitly enabled and is not set. Communication with the Control VF_ID is required.
INT t11vfPortTaggingAdminStatus	1.3.6.1.2.1.147.1.3.1.2	INTEGER	read-write	This object is used to configure the administrative status of Virtual Fabric tagging on this Port. SET operation Description -------------- ------------------------------------------- off(1) To disable Virtual Fabric tagging on this Port. on(2) To enable Virtual Fabric tagging on this Port if the attached Port doesn't prohibit it. auto(3) To enable Virtual Fabric tagging if the peer requests it.
INT t11vfPortTaggingOperStatus	1.3.6.1.2.1.147.1.3.1.3	INTEGER	read-only	This object is used to report the operational status of Virtual Fabric tagging on this Port. SET operation Description -------------- ------------------------------------------- off(1) Virtual Fabric tagging is disabled on this Port. on(2) Virtual Fabric tagging is enabled on this Port.
STO t11vfPortStorageType	1.3.6.1.2.1.147.1.3.1.4	StorageType	read-write	The storage type for this conceptual row, and for the corresponding row in the augmented fcmPortTable. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row.
t11vfLocallyEnabledTable	1.3.6.1.2.1.147.1.4		not-accessible	A table for assigning and reporting operational status of locally-enabled Virtual Fabric IDs to Ports. The set of Virtual Fabrics operational on the Port is the bit-wise 'AND' of the set of locally-enabled VF_IDs of this Port and the locally-enabled VF_IDs of the attached Port.
t11vfLocallyEnabledEntry	1.3.6.1.2.1.147.1.4.1		not-accessible	An entry for each locally-enabled VF_ID on each Port.
NUM t11vfLocallyEnabledPortIfIndex	1.3.6.1.2.1.147.1.4.1.1	InterfaceIndex	not-accessible	The value of the ifIndex that identifies the Port.
T11 t11vfLocallyEnabledVfId	1.3.6.1.2.1.147.1.4.1.2	T11FabricIndex	not-accessible	A locally-enabled VF_ID on this Port.
INT t11vfLocallyEnabledOperStatus	1.3.6.1.2.1.147.1.4.1.3	INTEGER	read-only	This object is used to report the operational status of Virtual Fabric tagging on this Port. SET operation Description -------------- ------------------------------------------- off(1) Virtual Fabric tagging is disabled on this Port. on(2) Virtual Fabric tagging is enabled on this Port.
ROW t11vfLocallyEnabledRowStatus	1.3.6.1.2.1.147.1.4.1.4	RowStatus	read-create	The status of this conceptual row. When a row in this table is in 'active(1)' state, no object in that row can be modified except t11vfLocallyEnabledRowStatus and t11vfLocallyEnabledStorageType.
STO t11vfLocallyEnabledStorageType	1.3.6.1.2.1.147.1.4.1.5	StorageType	read-create	The storage type for this conceptual row. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row.
t11vfConformance	1.3.6.1.2.1.147.2
t11vfMIBCompliances	1.3.6.1.2.1.147.2.1
t11vfMIBCompliance	1.3.6.1.2.1.147.2.1.1			Describes the requirements for compliance to the Fibre Channel Virtual Fabric MIB.
t11vfMIBGroups	1.3.6.1.2.1.147.2.2
t11vfGeneralGroup	1.3.6.1.2.1.147.2.2.1			A collection of objects for monitoring and configuring Virtual Fabrics in a Fibre Channel switch.

RFC description

Manages Virtual Fabric partitions and core switches for Fibre Channel fabric independence.

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Download T11-FC-VIRTUAL-FABRIC-MIB

What Is T11-FC-VIRTUAL-FABRIC-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description