T11-FC-RSCN-MIB

All MIBs › T11-FC-RSCN-MIB

Organization: For the initial versions, T11. For later versions, the IETF's IMSS Working Group.

Last Updated: 2007-01-08

Category: Fibre Channel and Storage

Description: Provides management of Fibre Channel Registered State Change Notifications (RSCNs), including Nx_Port registrations and RSCN statistics.

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

What Is T11-FC-RSCN-MIB?

T11-FC-RSCN-MIB is the standard T11/IETF Fibre Channel MIB (RFC 4983) managing RSCN (Registered State Change Notification) registrations and monitoring RSCN traffic on a Fibre Channel fabric. Its registration table, keyed by fabric index, records each Nx_Port's Fibre Channel ID and registration type, while a statistics table counts SCRs (State Change Registrations), inbound/outbound RSCNs and switch-RSCNs, rejected SCRs/RSCNs/switch-RSCNs, and RSCNs broken down by cause (unspecified, changed attribute, changed service, changed switch, removed). As a protocol-status MIB it lets a SAN administrator watch RSCN volume and rejection counts as indicators of fabric instability (e.g., a flapping port generating excessive state-change notifications). It is deployed on Fibre Channel fabric switches implementing FC-LS RSCN support. Engineers can download the T11-FC-RSCN-MIB file directly to load it into their MIB browser.

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

Fibre Channel fabric switches (FC-LS RSCN support, RFC 4983)

Monitoring Examples

A SAN administrator monitors t11FcRscnInRscns and t11FcRscnRscnRejects to catch a flapping Fibre Channel port generating an excessive volume of state-change notifications across the fabric.

What Can Be Monitored

RSCN registration and notification volume/rejection counts

Imported Objects

From FC-MGMT-MIB

FcAddressIdOrZero
FcNameIdOrZero
fcmInstanceIndex	OBJECT-TYPE
fcmSwitchIndex	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
mib-2

From SNMPv2-TC

TruthValue

From T11-FC-NAME-SERVER-MIB

T11NsGs4RejectReasonCode

From T11-TC-MIB

T11FabricIndex

How to Use in IPNetwork Monitor

Example using t11FcRscnInScrs OID:

Select a Fibre Channel fabric switches, FC-LS RSCN support RFC 4983 (state-change notification volume/rejection status) 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 t11FcRscnInScrs 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 SCRs received from Nx_Ports by this switch on this Fabric. 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 sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
t11FcRscnMIB	1.3.6.1.2.1.161			The MIB module for the management of registrations by Nx_Ports to receive RSCNs (Registered State Change Notifications) on a Fibre Channel Fabric, as defined in FC-LS, and for the monitoring of RSCNs sent/received or rejected in a Fibre Channel Fabric. Copyright (C) The Internet Society (2007). This version of this MIB module is part of RFC 4983; see the RFC itself for full legal notices.
t11FcRscnNotifications	1.3.6.1.2.1.161.0
NTF t11FcRscnElsRejectReqNotify	1.3.6.1.2.1.161.0.1			This notification is generated when a switch rejects an SCR or RSCN. The value of t11FcRscnRejectedRequestString indicates the binary content of the rejected request if available, or the zero-length string otherwise. The source of the rejected request is given by t11FcRscnRejectedRequestSource, and the reason for rejection is given by the values of t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp and t11FcRscnRejectReasonVendorCode.
NTF t11FcRscnIlsRejectReqNotify	1.3.6.1.2.1.161.0.2			This notification is generated when a switch rejects an SW_RSCN. The value of t11FcRscnRejectedRequestString indicates the binary content of the rejected request if available, or the zero-length string otherwise. The source of the rejected request is given by t11FcRscnRejectedRequestSource, and the reason for rejection is given by the values of t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp and t11FcRscnRejectReasonVendorCode.
t11FcRscnObjects	1.3.6.1.2.1.161.1
t11FcRscnRegistrations	1.3.6.1.2.1.161.1.1
t11FcRscnRegTable	1.3.6.1.2.1.161.1.1.1		not-accessible	A table of Nx_Ports that have registered to receive RSCNs on all Fabrics configured on one or more Fibre Channel switches.
t11FcRscnRegEntry	1.3.6.1.2.1.161.1.1.1.1		not-accessible	An entry containing information about one Nx_Port that has registered with a particular switch (identified by values of fcmInstanceIndex and fcmSwitchIndex) for a particular Fabric (identified by a t11FcRscnFabricIndex value).
T11 t11FcRscnFabricIndex	1.3.6.1.2.1.161.1.1.1.1.1	T11FabricIndex	not-accessible	An index value that uniquely identifies a particular Fabric. In a Fabric conformant to FC-SW-4, multiple Virtual Fabrics can operate within one (or more) physical infrastructures. In such a case, this index value is used to uniquely identify a particular Fabric within a physical infrastructure. In a Fabric that has (or can have) only a single Fabric operating within the physical infrastructure, the value of this Fabric Index will always be 1.
ADR t11FcRscnRegFcId	1.3.6.1.2.1.161.1.1.1.1.2	FcAddressIdOrZero	not-accessible	The Fibre Channel Address Identifier of the registering Nx_Port.
BIT t11FcRscnRegType	1.3.6.1.2.1.161.1.1.1.1.3	Bits	read-only	This object indicates the type of registration desired by the registering Nx_Port, one bit per type: 'fromFabricController' -- RSCNs generated for events detected by the Fabric Controller. 'fromNxPorts' -- RSCNs generated for events detected by the affected Nx_Port.
t11FcRscnStats	1.3.6.1.2.1.161.1.2
t11FcRscnStatsTable	1.3.6.1.2.1.161.1.2.1		not-accessible	The RSCN-related statistics on all Fabrics configured on one or more Fibre Channel switches. Two levels of statistics are included: 1) counters at the message-type level, for: - the number of SCRs received/rejected, - the number of RSCNs sent/received/rejected, - the number of SW_RSCNs sent/received/rejected. 2) counters of sent/received RSCNs per 'Event Qualifier' value. Note that if and when several RSCN events are coalesced into a single RSCN message, then that message may be counted in more than one of these counters.
t11FcRscnStatsEntry	1.3.6.1.2.1.161.1.2.1.1		not-accessible	An entry containing statistics for a particular Fabric (identified by a t11FcRscnFabricIndex value) on a particular switch (identified by values of fcmInstanceIndex and fcmSwitchIndex).
C32 t11FcRscnInScrsEx	1.3.6.1.2.1.161.1.2.1.1.1	Counter32	read-only	The number of SCRs received from Nx_Ports by this switch on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInRscns	1.3.6.1.2.1.161.1.2.1.1.2	Counter32	read-only	The number of RSCNs received from Nx_Ports by this switch on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutRscns	1.3.6.1.2.1.161.1.2.1.1.3	Counter32	read-only	The number of RSCNs transmitted to Nx_Ports by this switch on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInSwRscns	1.3.6.1.2.1.161.1.2.1.1.4	Counter32	read-only	The number of SW_RSCNs received by this switch from other switches on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutSwRscns	1.3.6.1.2.1.161.1.2.1.1.5	Counter32	read-only	The number of SW_RSCNs transmitted by this switch from other switches on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnScrRejects	1.3.6.1.2.1.161.1.2.1.1.6	Counter32	read-only	The number of SCRs rejected by this switch on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnRscnRejects	1.3.6.1.2.1.161.1.2.1.1.7	Counter32	read-only	The number of RSCNs rejected by this switch on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnSwRscnRejects	1.3.6.1.2.1.161.1.2.1.1.8	Counter32	read-only	The number of SW_RSCN rejected by this switch on this Fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInUnspecifiedRscns	1.3.6.1.2.1.161.1.2.1.1.9	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) received by this switch on this Fabric which contained an RSCN Event Qualifier value of '0000'b meaning 'Event is not specified'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutUnspecifiedRscns	1.3.6.1.2.1.161.1.2.1.1.10	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) sent by this switch on this Fabric which contained an RSCN Event Qualifier value of '0000'b meaning 'Event is not specified'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInChangedAttribRscns	1.3.6.1.2.1.161.1.2.1.1.11	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) received by this switch on this Fabric which contained an RSCN Event Qualifier value of '0002'b meaning 'Changed Port Attribute'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutChangedAttribRscns	1.3.6.1.2.1.161.1.2.1.1.12	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) sent by this switch on this Fabric which contained an RSCN Event Qualifier value of '0002'b meaning 'Changed Port Attribute'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInChangedServiceRscns	1.3.6.1.2.1.161.1.2.1.1.13	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) received by this switch on this Fabric which contained an RSCN Event Qualifier value of '0003'b meaning 'Changed Service Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutChangedServiceRscns	1.3.6.1.2.1.161.1.2.1.1.14	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) sent by this switch on this Fabric which contained an RSCN Event Qualifier value of '0003'b meaning 'Changed Service Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInChangedSwitchRscns	1.3.6.1.2.1.161.1.2.1.1.15	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) received by this switch on this Fabric which contained an RSCN Event Qualifier value of '0004'b meaning 'Changed Switch Configuration'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutChangedSwitchRscns	1.3.6.1.2.1.161.1.2.1.1.16	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) sent by this switch on this Fabric which contained an RSCN Event Qualifier value of '0004'b meaning 'Changed Switch Configuration'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnInRemovedRscns	1.3.6.1.2.1.161.1.2.1.1.17	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) received by this switch on this Fabric which contained an RSCN Event Qualifier value of '0005'b meaning 'Removed Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
C32 t11FcRscnOutRemovedRscns	1.3.6.1.2.1.161.1.2.1.1.18	Counter32	read-only	The number of Registered State Change Notifications (RSCNs) sent by this switch on this Fabric which contained an RSCN Event Qualifier value of '0005'b meaning 'Removed Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0.
t11FcRscnInformation	1.3.6.1.2.1.161.1.3
t11FcRscnNotifyControlTable	1.3.6.1.2.1.161.1.3.1		not-accessible	A table of control information for notifications generated due to the rejection of an SCR or RSCN.
t11FcRscnNotifyControlEntry	1.3.6.1.2.1.161.1.3.1.1		not-accessible	Each entry contains notification control information concerning the rejection of RSCN/SCRs for a particular Fabric (identified by the value of t11FcRscnFabricIndex) by a particular switch (identified by values of fcmInstanceIndex and fcmSwitchIndex).
T/F t11FcRscnIlsRejectNotifyEnable	1.3.6.1.2.1.161.1.3.1.1.1	TruthValue	read-write	This object specifies if a t11FcRscnIlsRejectReqNotify notification should be generated when this switch rejects an SW_RSCN on this Fabric. Values written to this object should be retained over agent reboots.
T/F t11FcRscnElsRejectNotifyEnable	1.3.6.1.2.1.161.1.3.1.1.2	TruthValue	read-write	This object specifies if a t11FcRscnElsRejectReqNotify notification should be generated when this switch rejects an RSCN or SCR on this Fabric. Values written to this object should be retained over agent reboots.
OCT t11FcRscnRejectedRequestString	1.3.6.1.2.1.161.1.3.1.1.3	OCTET STRING	read-only	The binary content of the RSCN, SCR, or SW_RSCN that was most recently rejected by this switch on this Fabric. The value is formatted as an octet string (in network byte order) as described in the relevant Fibre Channel standard, containing the payload (which is typically a list of affected ports and error codes) of the rejected RSCN or SCR as described in FC-LS, or the rejected SW_RSCN as described in FC-SW-4. This object contains the zero-length string if and when the RSCN/SCR/SW_RSCN payload is unavailable. When the length of this object is 255 octets, it contains the first 255 octets of the payload (in network byte order).
FCN t11FcRscnRejectedRequestSource	1.3.6.1.2.1.161.1.3.1.1.4	FcNameIdOrZero	read-only	The WWN that was the source of the RSCN, SCR, or SW_RSCN that was most recently rejected by this switch on this Fabric.
T11 t11FcRscnRejectReasonCode	1.3.6.1.2.1.161.1.3.1.1.5	T11NsGs4RejectReasonCode	read-only	This object contains the Reason Code of the most recent rejection by this switch of an RSCN, SCR or SW_RSCN on this Fabric.
OCT t11FcRscnRejectReasonCodeExp	1.3.6.1.2.1.161.1.3.1.1.6	OCTET STRING	read-only	This object contains the Reason Code Explanation of the most recent rejection by this switch of an RSCN, SCR or SW_RSCN on this Fabric.
OCT t11FcRscnRejectReasonVendorCode	1.3.6.1.2.1.161.1.3.1.1.7	OCTET STRING	read-only	This object contains the Reason Vendor Specific Code of the most recent rejection by this switch of an RSCN, SCR or SW_RSCN on this Fabric.
t11FcRscnConformance	1.3.6.1.2.1.161.2
t11FcRscnCompliances	1.3.6.1.2.1.161.2.1
t11FcRscnCompliance	1.3.6.1.2.1.161.2.1.1			The compliance statement for entities that implement this MIB.
t11FcRscnGroups	1.3.6.1.2.1.161.2.2
t11FcRscnRegistrationGroup	1.3.6.1.2.1.161.2.2.1			A collection of objects for monitoring RSCN registrations.
t11FcRscnStatsGroup	1.3.6.1.2.1.161.2.2.2			A collection of objects for collecting RSCN-related statistics.
t11FcRscnNotifyControlGroup	1.3.6.1.2.1.161.2.2.3			A collection of notification control and notification information objects.
t11FcRscnNotifyGroup	1.3.6.1.2.1.161.2.2.4			A collection of notifications for monitoring ILS and ELS rejections by the RSCN module.

RFC description

Fibre Channel Registered State Change Notification (RSCN) management; monitors RSCN registrations and usage on FC fabrics.

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Download T11-FC-RSCN-MIB