IEEE8021-SRP-MIB

All MIBs › IEEE8021-SRP-MIB

Organization: IEEE 802.1 Working Group

Last Updated: 2018-10-04

Category: Quality of Service, Standard: IEEE 802

Description: IEEE 802.1 MIB for Stream Reservation Protocol (SRP/802.1Qat) managing bandwidth reservation for audio-video bridging streams.

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What Is IEEE8021-SRP-MIB?

IEEE8021-SRP-MIB is the standard IEEE 802.1 Working Group MIB (part of IEEE Std 802.1Q) managing SRP (Stream Reservation Protocol, underlying Audio/Video Bridging via MSRP), which reserves guaranteed bandwidth/latency for time-sensitive streams across a bridged network. Its bridge-base table records MSRP enable status, talker pruning, max fan-in ports, latency max-frame-size, talker-VLAN pruning, and max SR classes, a bridge-port table records per-port MSRP status, failed-registration count, last PDU origin, and SR PVID, a latency table maps traffic class to per-port latency, and a stream table records stream ID, destination address, VLAN ID, and max frame size (Tspec). As a configuration/protocol-status MIB it lets an administrator confirm SRP is correctly reserving bandwidth for a registered AVB stream and watch for failed reservations. It is deployed on network devices implementing IEEE 802.1Q Stream Reservation Protocol (AVB/TSN). Engineers implementing or auditing this functionality typically reference the IEEE8021-SRP-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in IEEE8021-SRP-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

Network devices implementing IEEE 802.1Q SRP (AVB/TSN)

Monitoring Examples

An administrator checks ieee8021SrpBridgePortMsrpFailedRegistrations to diagnose a registered audio/video stream that isn't reserving bandwidth as expected on an AVB/TSN-capable switch.

What Can Be Monitored

stream reservation status and failed registrations

Imported Objects

From IEEE8021-BRIDGE-MIB

ieee8021BridgeBaseComponentId	OBJECT-TYPE
ieee8021BridgeBaseEntry	OBJECT-TYPE
ieee8021BridgeBasePort	OBJECT-TYPE
ieee8021BridgeBasePortEntry	OBJECT-TYPE

From IEEE8021-FQTSS-MIB

IEEE8021FqtssTrafficClassValue

From IEEE8021-TC-MIB

IEEE8021PriorityCodePoint
IEEE8021VlanIndex
ieee802dot1mibs	OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter64
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

MacAddress
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using ieee8021SrpBridgePortMsrpFailedRegistrations OID:

Select a device implementing IEEE8021-SRP-MIB 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 ieee8021SrpBridgePortMsrpFailedRegistrations 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 total number of failed MSRP registrations, for any reason, in all VLANs, on this port. 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 Counter64-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
ieee8021SrpMib	1.3.111.2.802.1.1.19			The Bridge MIB module for managing devices that support the IEEE Std 802.1Q Stream Reservation Protocol. Unless otherwise indicated, the references in this MIB module are to IEEE Std 802.1Q. Copyright (C) IEEE (2018). This version of this MIB module is part of IEEE Std 802.1Q; see the draft itself for full legal notices.
ieee8021SrpNotifications	1.3.111.2.802.1.1.19.0
ieee8021SrpObjects	1.3.111.2.802.1.1.19.1
ieee8021SrpConfiguration	1.3.111.2.802.1.1.19.1.1
ieee8021SrpBridgeBaseTable	1.3.111.2.802.1.1.19.1.1.1		not-accessible	A table for SRP main control and status information. All writeable objects in this table must be persistent over power up restart/reboot. These objects augment the ieee8021BridgeBasePortTable.
ieee8021SrpBridgeBaseEntry	1.3.111.2.802.1.1.19.1.1.1.1		not-accessible	SRP control and status information for a Bridge.
T/F ieee8021SrpBridgeBaseMsrpEnabledStatus	1.3.111.2.802.1.1.19.1.1.1.1.1	TruthValue	read-create	The administrative status requested by management for MSRP. The value true(1) indicates that MSRP should be enabled on this device, in all VLANs, on all ports for which it has not been specifically disabled. When false(2), MSRP is disabled, in all VLANs and on all ports, and all MSRP frames will be forwarded transparently. This objects affects both Applicant and Registrar state machines. A transition from false(2) to true(1) will cause a reset of all MSRP state machines on all ports. This object may be modified while the corresponding instance of ieee8021BridgeBaseRowStatus is active(1). The value of this object MUST be retained across reinitializations of the management system.
T/F ieee8021SrpBridgeBaseMsrpTalkerPruning	1.3.111.2.802.1.1.19.1.1.1.1.2	TruthValue	read-create	The value of the talkerPruning parameter which controls the propagation of Talker declarations. The value true(1) indicates that Talker attributes are only declared on ports that have the Stream destination_address registered in the MMRP MAC Address Registration Entries. When false(2), Talker attribute are declared on all egress ports in the active topology. The value of this object MUST be retained across reinitializations of the management system.
U32 ieee8021SrpBridgeBaseMsrpMaxFanInPorts	1.3.111.2.802.1.1.19.1.1.1.1.3	Unsigned32	read-create	The value of the msrpMaxFanInPorts parameter which limits the total number of ports on a Bridge that are allowed to establish reservations for inbound Streams. A value of zero (0) indicates no fan-in limit is being specified and calculations involving fan-in will only be limited by the number of MSRP enabled ports. The value of this object MUST be retained across reinitializations of the management system.
U32 ieee8021SrpBridgeBaseMsrpLatencyMaxFrameSize	1.3.111.2.802.1.1.19.1.1.1.1.4	Unsigned32	read-create	The value of msrpLatencyMaxFrameSize parameter which is used in the calculation of the maximum latency through a Bridge. The maximum size is defined to be 2000 octets by default, but may be set to a smaller or larger value dependent on the particular Bridge configuration. This parameter does not imply any type of policing of frame size, it is only used in the latency calculations. The value of this object MUST be retained across reinitializations of the management system.
T/F ieee8021SrpBridgeBaseMsrpTalkerVlanPruning	1.3.111.2.802.1.1.19.1.1.1.1.5	TruthValue	read-create	This parameter allows to limit the Talker declaration to ports, that have the Stream's VLAN identifier registered as a member in the VLAN Registration Entries. The value true(1) indicates that Talker declarations are only sent out on ports, that have the Stream's VLAN identifier registered as a member in the VLAN Registration Entries. When false(2), Talker declarations are propagated according to the VLAN spanning tree.
U32 ieee8021SrpBridgeBaseMsrpMaxSRClasses	1.3.111.2.802.1.1.19.1.1.1.1.6	Unsigned32	read-only	This attribute provides the maximum number of SR classes supported by the Bridge.
ieee8021SrpBridgePortTable	1.3.111.2.802.1.1.19.1.1.2		not-accessible	A table for SRP control and status information about every Bridge Port. Augments the ieee8021BridgeBasePortTable.
ieee8021SrpBridgePortEntry	1.3.111.2.802.1.1.19.1.1.2.1		not-accessible	SRP control and status information for a Bridge Port.
T/F ieee8021SrpBridgePortMsrpEnabledStatus	1.3.111.2.802.1.1.19.1.1.2.1.1	TruthValue	read-create	The administrative state of MSRP operation on this port. The value true(1) indicates that MSRP is enabled on this port in all VLANs as long as ieee8021BridgeMsrpEnabledStatus is also true(1). A value of false(2) indicates that MSRP is disabled on this port in all VLANs: any MSRP frames received will be silently discarded, and no MSRP registrations will be propagated from other ports. Setting this to a value of true(1) will be stored by the agent but will only take effect on the MSRP protocol operation if ieee8021BridgeMsrpEnabledStatus also indicates the value true(1). This object affects all MSRP Applicant and Registrar state machines on this port. A transition from false(2) to true(1) will cause a reset of all MSRP state machines on this port. The value of this object MUST be retained across reinitializations of the management system.
C64 ieee8021SrpBridgePortMsrpFailedRegistrationsEx	1.3.111.2.802.1.1.19.1.1.2.1.2	Counter64	read-only	The total number of failed MSRP registrations, for any reason, in all VLANs, on this port. Discontinuities in the value of the counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime object of the associated interface (if any).
MAC ieee8021SrpBridgePortMsrpLastPduOrigin	1.3.111.2.802.1.1.19.1.1.2.1.3	MacAddress	read-only	The Source MAC Address of the last MSRP message received on this port.
IEE ieee8021SrpBridgePortSrPvid	1.3.111.2.802.1.1.19.1.1.2.1.4	IEEE8021VlanIndex	read-create	The default VLAN ID that Streams are assigned to. Talkers learn this VID from the SRP Domain attribute and tag Streams accordingly. The value of this object MUST be retained across reinitializations of the management system.
T/F ieee8021SrpBridgePortMsrpTalkerPrunningPerPort	1.3.111.2.802.1.1.19.1.1.2.1.5	TruthValue	read-create	This parameter controls the forwarding behavior for Talker declarations on the port when the TalkerPruning parameter is disabled for the bridge. The value true(1) indicates, that Talker declarations are only forwarded on that port, if the destination_address of the Stream is found in the MAC Address Registration Entries for the port. When false(2), Talker declarations are forwarded on that port regardless of the destination address.
ieee8021SrpLatency	1.3.111.2.802.1.1.19.1.2
ieee8021SrpLatencyTable	1.3.111.2.802.1.1.19.1.2.1		not-accessible	A table containing a set of latency measurement parameters for each traffic class.
ieee8021SrpLatencyEntry	1.3.111.2.802.1.1.19.1.2.1.1		not-accessible	A list of objects containing latency information for each traffic class. Rows in the table are automatically created for ports that are not an SRP domain boundary port (i.e. SRPdomainBoundaryPort is FALSE). See 35.1.4, 8.8.2, 12.22.3.
IEE ieee8021SrpTrafficClass	1.3.111.2.802.1.1.19.1.2.1.1.1	IEEE8021FqtssTrafficClassValue	not-accessible	The traffic class number associated with the row of the table. Rows in the table are automatically created for ports that are not an SRP domain boundary port (i.e. SRPdomainBoundaryPort is FALSE).
U32 ieee8021SrpPortTcLatency	1.3.111.2.802.1.1.19.1.2.1.1.2	Unsigned32	read-only	The value of the portTcMaxLatency parameter for the traffic class. This value is expressed in nano-seconds.
ieee8021SrpStreams	1.3.111.2.802.1.1.19.1.3
ieee8021SrpStreamTable	1.3.111.2.802.1.1.19.1.3.1		not-accessible	A table containing a set of characteristics for each registered Stream.
ieee8021SrpStreamEntry	1.3.111.2.802.1.1.19.1.3.1.1		not-accessible	A list of objects containing characteristics for each registered Stream. Rows in the table are automatically created for Streams registered on any port of a Bridge.
IEE ieee8021SrpStreamId	1.3.111.2.802.1.1.19.1.3.1.1.1	IEEE8021SrpStreamIdValue	not-accessible	The Stream ID associated with the row of the table. Rows in the table are automatically created when Streams are registered via MSRP.
MAC ieee8021SrpStreamDestinationAddress	1.3.111.2.802.1.1.19.1.3.1.1.2	MacAddress	read-only	The MAC destination address for the Stream described by this reservation.
IEE ieee8021SrpStreamVlanId	1.3.111.2.802.1.1.19.1.3.1.1.3	IEEE8021VlanIndex	read-only	The VLAN ID associated with the MSRP registration for this Stream.
U32 ieee8021SrpStreamTspecMaxFrameSize	1.3.111.2.802.1.1.19.1.3.1.1.4	Unsigned32	read-only	The maximum size frame that will be sent by a Talker for this Stream. This value is part of the Traffic Specification for the Stream.
U32 ieee8021SrpStreamTspecMaxIntervalFrames	1.3.111.2.802.1.1.19.1.3.1.1.5	Unsigned32	read-only	The maximum number of frame that will be sent during a class measurement interval (L.2). This value is part of the Traffic Specification for the Stream.
NUM ieee8021SrpStreamDataFramePriority	1.3.111.2.802.1.1.19.1.3.1.1.6	IEEE8021PriorityCodePoint	read-only	The Priority Code Point (PCP) value that the referenced Stream will be tagged with. This value is used to distinguish Class A and Class B traffic.
IEE ieee8021SrpStreamRank	1.3.111.2.802.1.1.19.1.3.1.1.7	IEEE8021SrpStreamRankValue	read-only	SRP supports emergency and non-emergency. Emergency traffic will interrupt non-emergency traffic if there is insufficient bandwidth or resources available for the emergency traffic.
ieee8021SrpStreamPreloadTable	1.3.111.2.802.1.1.19.1.3.2		not-accessible	A table containing a set of parameters for each StreamID that is preloaded on the Bridge as it initializes.
ieee8021SrpStreamPreloadEntry	1.3.111.2.802.1.1.19.1.3.2.1		not-accessible	A list of objects containing characteristics for each registered Stream. Rows in the table are automatically created for Streams registered on any port of a Bridge.
IEE ieee8021SrpStreamPreloadId	1.3.111.2.802.1.1.19.1.3.2.1.1	IEEE8021SrpStreamIdValue	not-accessible	The 64-bit StreamID is used to match Talker registrations with their corresponding Listener registrations(35.2.4).
MAC ieee8021SrpStreamPreloadDestinationAddress	1.3.111.2.802.1.1.19.1.3.2.1.2	MacAddress	read-write	The MAC destination address for the Stream described by this reservation.
IEE ieee8021SrpStreamPreloadVlanId	1.3.111.2.802.1.1.19.1.3.2.1.3	IEEE8021VlanIndex	read-write	The VLAN ID associated with the MSRP registration for this Stream.
U32 ieee8021SrpStreamPreloadTspecMaxFrameSize	1.3.111.2.802.1.1.19.1.3.2.1.4	Unsigned32	read-write	The maximum size frame that will be sent by a Talker for this Stream. This value is part of the Traffic Specification for the Stream.
U32 ieee8021SrpStreamPreloadTspecMaxIntervalFrames	1.3.111.2.802.1.1.19.1.3.2.1.5	Unsigned32	read-write	The maximum number of frames that the Talker may transmit in one classMeasurementInterval (34.3). This value is part of the Traffic Specification for the Stream.
NUM ieee8021SrpStreamPreloadDataFramePriority	1.3.111.2.802.1.1.19.1.3.2.1.6	IEEE8021PriorityCodePoint	read-write	The Priority Code Point (PCP) value that the referenced Stream will be tagged with. This value is used to distinguish Class A and Class B traffic.
IEE ieee8021SrpStreamPreloadRank	1.3.111.2.802.1.1.19.1.3.2.1.7	IEEE8021SrpStreamRankValue	read-write	SRP supports emergency and non-emergency. Emergency traffic will interrupt non-emergency traffic if there is insufficient bandwidth or resources available for the emergency traffic.
ieee8021SrpReservations	1.3.111.2.802.1.1.19.1.4
ieee8021SrpReservationsTable	1.3.111.2.802.1.1.19.1.4.1		not-accessible	A table containing Stream attribute registrations per port.
ieee8021SrpReservationsEntry	1.3.111.2.802.1.1.19.1.4.1.1		not-accessible	A list of objects containing Stream attribute registrations per port. Rows in the table are automatically created for Streams registered on any port of a Bridge.
IEE ieee8021SrpReservationStreamId	1.3.111.2.802.1.1.19.1.4.1.1.1	IEEE8021SrpStreamIdValue	not-accessible	The Stream ID associated with the row of the table. Rows in the table are automatically created when Streams are registered via MSRP.
IEE ieee8021SrpReservationDirection	1.3.111.2.802.1.1.19.1.4.1.1.2	IEEE8021SrpReservationDirectionValue	not-accessible	The source of this Stream registration, either Talker or Listener.
IEE ieee8021SrpReservationDeclarationType	1.3.111.2.802.1.1.19.1.4.1.1.3	IEEE8021SrpReservationDeclarationTypeValue	read-only	The type of Talker or Listener registration.
U32 ieee8021SrpReservationAccumulatedLatency	1.3.111.2.802.1.1.19.1.4.1.1.4	Unsigned32	read-only	The Accumulated Latency associated with the current registration. For Talker registrations this represents the accumulated latency from the Talker to the ingress port of this Bridge. For Listener registrations this represents the accumulated latency to the ingress port of the neighbor Bridge or end stations. This include the latency of the media attached to this egress port.
OCT ieee8021SrpReservationFailureSystemId	1.3.111.2.802.1.1.19.1.4.1.1.5	OCTET STRING	read-only	The first system that changes a Talker Advertise to a Talker Failed registration will report its System Identification in this field. That single System Identification is then propagated from system to system.
IEE ieee8021SrpReservationFailureCode	1.3.111.2.802.1.1.19.1.4.1.1.6	IEEE8021SrpReservationFailureCodeValue	read-only	The first Bridge that changes a Talker Advertise to a Talker Failed registration will report the Failure Code in this field. That single Failure Code is then propagated from Bridge to Bridge.
C64 ieee8021SrpReservationDroppedStreamFrames	1.3.111.2.802.1.1.19.1.4.1.1.7	Counter64	read-only	A count of the number of data stream frames that have been dropped for whatever reason. These are not MSRP frames, but the stream data frames that are carried by the MSRP Reservation. Discontinuities in the value of the counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime object of the associated interface (if any).
U32 ieee8021SrpReservationStreamAge	1.3.111.2.802.1.1.19.1.4.1.1.8	Unsigned32	read-only	The number of seconds since the reservation was established on this port.
ieee8021SrpReservationsPreloadTable	1.3.111.2.802.1.1.19.1.4.2		not-accessible	A table containing Stream attribute registrations per port.
ieee8021SrpReservationsPreloadEntry	1.3.111.2.802.1.1.19.1.4.2.1		not-accessible	A list of objects containing Stream attribute registrations per port. Rows in the table are automatically created for Streams registered on any port of a Bridge.
IEE ieee8021SrpReservationsPreloadStreamId	1.3.111.2.802.1.1.19.1.4.2.1.1	IEEE8021SrpStreamIdValue	not-accessible	The 64-bit StreamID is used to match Talker registrations with their corresponding Listener registrations(35.2.4).
IEE ieee8021SrpReservationPreloadDirection	1.3.111.2.802.1.1.19.1.4.2.1.2	IEEE8021SrpReservationDirectionValue	read-write	The source of this Stream registration, either Talker or Listener
U32 ieee8021SrpReservationPreloadAccumulatedLatency	1.3.111.2.802.1.1.19.1.4.2.1.3	Unsigned32	read-write	The Accumulated Latency associated with the current registration. For Talker registrations this represents the accumulated latency from the Talker to the ingress port of this Bridge. For Listener registrations this represents the accumulated latency to the ingress port of the neighbor Bridge or end stations. This include the latency of the media attached to this egress port.
ieee8021SrpConformance	1.3.111.2.802.1.1.19.2
ieee8021SrpCompliances	1.3.111.2.802.1.1.19.2.1
ieee8021SrpCompliance	1.3.111.2.802.1.1.19.2.1.1			The compliance statement for devices supporting Stream Reservation Protocol. Support of the objects defined in the IEEE8021-SRP MIB also requires support of the IEEE8021-BRIDGE-MIB; the provisions of 17.3.2 apply to implementations claiming support of the IEEE8021-SRP MIB.
ieee8021SrpGroups	1.3.111.2.802.1.1.19.2.2
ieee8021SrpConfigurationGroup	1.3.111.2.802.1.1.19.2.2.1			Objects that define configuration of SRP.
ieee8021SrpLatencyGroup	1.3.111.2.802.1.1.19.2.2.2			Objects that define latency for SRP.
ieee8021SrpStreamsGroup	1.3.111.2.802.1.1.19.2.2.3			Objects that define Streams for SRP.
ieee8021SrpReservationsGroup	1.3.111.2.802.1.1.19.2.2.4			Objects that define Stream Reservations for SRP.
ieee8021SrpConfigurationPruningGroup	1.3.111.2.802.1.1.19.2.2.5			Objects that allow configuration of pruning behavior for SRP.
ieee8021SrpMonitoringSRclassesGroup	1.3.111.2.802.1.1.19.2.2.6			Objects that provides information on the maximum number of SR classes supported on the Bridge.
ieee8021SrpStreamsPreloadGroup	1.3.111.2.802.1.1.19.2.2.7			Objects that allow to preload parameters for each StreamId on Bridge Ports as the Bridge initializes.
ieee8021SrpReservationsPreloadGroup	1.3.111.2.802.1.1.19.2.2.8			Objects that allow to initialize Streams within each Bridge as it powers up, to preload the Stream registrations that will later be provided by operation of SRP.

RFC description

Management of IEEE 802.1Q Stream Reservation Protocol (SRP) and SRP enhancements in bridge devices.

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Download IEEE8021-SRP-MIB