P-BRIDGE-MIB

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Organization: IETF Bridge MIB Working Group

Last Updated: 2006-01-09

Category: Routing Protocols, VLAN and Bridging

Description: Defines managed objects for managing IEEE 802.1D bridge extensions for traffic class priority handling and GMRP multicast filtering.

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

What Is P-BRIDGE-MIB?

P-BRIDGE-MIB is a vendor-neutral IETF standards module (RFC 4363) that extends the base BRIDGE-MIB with objects for IEEE 802.1D-1998 traffic-class priority handling, GARP Multicast Registration Protocol (GMRP) multicast filtering, and IEEE 802.1t Restricted Group Registration. It exposes configuration and status data such as overall device bridging capabilities (dot1dDeviceCapabilities), whether traffic-class prioritization and GMRP are enabled (dot1dTrafficClassesEnabled, dot1dGmrpStatus), per-port capability flags (dot1dPortCapabilitiesTable), and per-port priority mappings (dot1dPortPriorityTable, dot1dPortDefaultUserPriority, dot1dUserPriorityRegenTable). For hardware/software status monitoring, this module lets an operator confirm whether QoS traffic-class prioritization and multicast pruning features are actually enabled and correctly configured on each switch port, which is important for diagnosing why certain multicast traffic is or isn't being forwarded, or why traffic isn't receiving expected priority treatment. As p-bridge-mib, it is a direct extension of BRIDGE-MIB and is typically deployed alongside it, often together with Q-BRIDGE-MIB for VLAN-aware bridges, so it shares that module's dependency on IF-MIB via port-to-ifIndex mapping. It is found on managed Ethernet switches that support IEEE 802.1D priority queuing and GMRP multicast filtering, typically enterprise-grade switches rather than simple unmanaged devices.

IPNetwork Monitor allows you to monitor SNMP objects defined in P-BRIDGE-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, not tied to a specific manufacturer
applies to IEEE 802.1D-compliant managed Ethernet switches supporting priority/GMRP features

Monitoring Examples

An administrator would poll dot1dGmrpStatus to confirm GMRP multicast filtering is enabled on a switch, and walk dot1dPortPriorityTable/dot1dPortDefaultUserPriority per port to verify a port is tagging traffic with the expected default user priority for QoS treatment. They might also check dot1dPortCapabilitiesTable to confirm a specific port actually supports the traffic-class and GMRP features assumed by the network design, revealing a misconfiguration if a port that should support prioritization reports it as unsupported.

What Can Be Monitored

GMRP multicast filtering status
traffic-class prioritization enabled/disabled
per-port priority capability
per-port default user priority
user priority regeneration mapping

Imported Objects

From BRIDGE-MIB

dot1dBasePort	OBJECT-TYPE
dot1dBridge	MODULE-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
mib-2

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
BIT dot1dDeviceCapabilities	1.3.6.1.2.1.17.6.1.1.1	Bits	read-only	Device capabilities.
dot1dExtBase	1.3.6.1.2.1.17.6.1.1
dot1dGarp	1.3.6.1.2.1.17.6.1.3
dot1dGmrp	1.3.6.1.2.1.17.6.1.4
ENA dot1dGmrpStatus	1.3.6.1.2.1.17.6.1.1.3	EnabledStatus	read-write	GMRP status.
BIT dot1dPortCapabilities	1.3.6.1.2.1.17.6.1.1.4.1.1	Bits	read-only	Port capabilities.
dot1dPortCapabilitiesEntry	1.3.6.1.2.1.17.6.1.1.4.1		not-accessible	Port capabilities entry.
dot1dPortCapabilitiesTable	1.3.6.1.2.1.17.6.1.1.4		not-accessible	Port capabilities table.
I32 dot1dPortDefaultUserPriority	1.3.6.1.2.1.17.6.1.2.1.1.1	Integer32	read-write	The default ingress User Priority for this port. This only has effect on media, such as Ethernet, that do not support native User Priority. The value of this object MUST be retained across reinitializations of the management system.
dot1dPortGarpEntry	1.3.6.1.2.1.17.6.1.3.1.1		not-accessible	GARP control information for a bridge port.
NUM dot1dPortGarpJoinTime	1.3.6.1.2.1.17.6.1.3.1.1.1	TimeInterval	read-write	The GARP Join time, in centiseconds. The value of this object MUST be retained across reinitializations of the management system.
NUM dot1dPortGarpLeaveAllTime	1.3.6.1.2.1.17.6.1.3.1.1.3	TimeInterval	read-write	The GARP LeaveAll time, in centiseconds. The value of this object MUST be retained across reinitializations of the management system.
NUM dot1dPortGarpLeaveTime	1.3.6.1.2.1.17.6.1.3.1.1.2	TimeInterval	read-write	The GARP Leave time, in centiseconds. The value of this object MUST be retained across reinitializations of the management system.
dot1dPortGarpTable	1.3.6.1.2.1.17.6.1.3.1		not-accessible	A table of GARP control information about every bridge port. This is indexed by dot1dBasePort.
dot1dPortGmrpEntry	1.3.6.1.2.1.17.6.1.4.1.1		not-accessible	GMRP control and status information for a bridge port.
C32 dot1dPortGmrpFailedRegistrations	1.3.6.1.2.1.17.6.1.4.1.1.2	Counter32	read-only	The total number of failed GMRP registrations, for any reason, in all VLANs, on this port.
MAC dot1dPortGmrpLastPduOrigin	1.3.6.1.2.1.17.6.1.4.1.1.3	MacAddress	read-only	The Source MAC Address of the last GMRP message received on this port.
ENA dot1dPortGmrpStatus	1.3.6.1.2.1.17.6.1.4.1.1.1	EnabledStatus	read-write	The administrative state of GMRP operation on this port. The value enabled(1) indicates that GMRP is enabled on this port in all VLANs as long as dot1dGmrpStatus is also enabled(1). A value of disabled(2) indicates that GMRP is disabled on this port in all VLANs: any GMRP packets received will be silently discarded, and no GMRP registrations will be propagated from other ports. Setting this to a value of enabled(1) will be stored by the agent but will only take effect on the GMRP protocol operation if dot1dGmrpStatus also indicates the value enabled(1). This object affects all GMRP Applicant and Registrar state machines on this port. A transition from disabled(2) to enabled(1) will cause a reset of all GMRP state machines on this port. The value of this object MUST be retained across reinitializations of the management system.
dot1dPortGmrpTable	1.3.6.1.2.1.17.6.1.4.1		not-accessible	A table of GMRP control and status information about every bridge port. Augments the dot1dBasePortTable.
I32 dot1dPortNumTrafficClasses	1.3.6.1.2.1.17.6.1.2.1.1.2	Integer32	read-write	The number of egress traffic classes supported on this port. This object may optionally be read-only. The value of this object MUST be retained across reinitializations of the management system.
I32 dot1dPortOutboundAccessPriority	1.3.6.1.2.1.17.6.1.2.4.1.1	Integer32	read-only	The Outbound Access Priority the received frame is mapped to.
dot1dPortOutboundAccessPriorityEntry	1.3.6.1.2.1.17.6.1.2.4.1		not-accessible	Regenerated User Priority to Outbound Access Priority mapping.
dot1dPortOutboundAccessPriorityTable	1.3.6.1.2.1.17.6.1.2.4		not-accessible	A table mapping Regenerated User Priority to Outbound Access Priority. This is a fixed mapping for all port types, with two options for 802.5 Token Ring.
dot1dPortPriorityEntry	1.3.6.1.2.1.17.6.1.2.1.1		not-accessible	A list of Default User Priorities for each port of a transparent bridge. This is indexed by dot1dBasePort.
dot1dPortPriorityTable	1.3.6.1.2.1.17.6.1.2.1		not-accessible	A table that contains information about every port that is associated with this transparent bridge.
T/F dot1dPortRestrictedGroupRegistration	1.3.6.1.2.1.17.6.1.4.1.1.4	TruthValue	read-write	The state of Restricted Group Registration on this port. If the value of this control is true(1), then creation of a new dynamic entry is permitted only if there is a Static Filtering Entry for the VLAN concerned, in which the Registrar Administrative Control value is Normal Registration. The value of this object MUST be retained across reinitializations of the management system.
dot1dPriority	1.3.6.1.2.1.17.6.1.2
I32 dot1dRegenUserPriority	1.3.6.1.2.1.17.6.1.2.2.1.2	Integer32	read-write	The Regenerated User Priority that the incoming User Priority is mapped to for this port. The value of this object MUST be retained across reinitializations of the management system.
dot1dTpHCPortEntry	1.3.6.1.2.1.17.4.5.1		not-accessible	Statistics information for each high-capacity port of a transparent bridge.
C64 dot1dTpHCPortInDiscards	1.3.6.1.2.1.17.4.5.1.3	Counter64	read-only	Count of valid frames that have been received by this port from its segment that were discarded (i.e., filtered) by the Forwarding Process.
C64 dot1dTpHCPortInFrames	1.3.6.1.2.1.17.4.5.1.1	Counter64	read-only	The number of frames that have been received by this port from its segment. Note that a frame received on the interface corresponding to this port is only counted by this object if and only if it is for a protocol being processed by the local bridging function, including bridge management frames.
C64 dot1dTpHCPortOutFrames	1.3.6.1.2.1.17.4.5.1.2	Counter64	read-only	The number of frames that have been transmitted by this port to its segment. Note that a frame transmitted on the interface corresponding to this port is only counted by this object if and only if it is for a protocol being processed by the local bridging function, including bridge management frames.
dot1dTpHCPortTable	1.3.6.1.2.1.17.4.5		not-accessible	A table that contains information about every high- capacity port that is associated with this transparent bridge.
C32 dot1dTpPortInOverflowDiscards	1.3.6.1.2.1.17.4.6.1.3	Counter32	read-only	The number of times the associated dot1dTpPortInDiscards counter has overflowed.
C32 dot1dTpPortInOverflowFrames	1.3.6.1.2.1.17.4.6.1.1	Counter32	read-only	The number of times the associated dot1dTpPortInFrames counter has overflowed.
C32 dot1dTpPortOutOverflowFrames	1.3.6.1.2.1.17.4.6.1.2	Counter32	read-only	The number of times the associated dot1dTpPortOutFrames counter has overflowed.
dot1dTpPortOverflowEntry	1.3.6.1.2.1.17.4.6.1		not-accessible	The most significant bits of statistics counters for a high- capacity interface of a transparent bridge. Each object is associated with a corresponding object in dot1dTpPortTable that indicates the least significant bits of the counter.
dot1dTpPortOverflowTable	1.3.6.1.2.1.17.4.6		not-accessible	A table that contains the most-significant bits of statistics counters for ports that are associated with this transparent bridge that are on high-capacity interfaces, as defined in the conformance clauses for this table. This table is provided as a way to read 64-bit counters for agents that support only SNMPv1. Note that the reporting of most-significant and least-significant counter bits separately runs the risk of missing an overflow of the lower bits in the interval between sampling. The manager must be aware of this possibility, even within the same varbindlist, when interpreting the results of a request or asynchronous notification.
I32 dot1dTrafficClass	1.3.6.1.2.1.17.6.1.2.3.1.2	Integer32	read-write	The Traffic Class the received frame is mapped to. The value of this object MUST be retained across reinitializations of the management system.
dot1dTrafficClassEntry	1.3.6.1.2.1.17.6.1.2.3.1		not-accessible	User Priority to Traffic Class mapping.
T/F dot1dTrafficClassesEnabled	1.3.6.1.2.1.17.6.1.1.2	TruthValue	read-write	Traffic classes enabled.
I32 dot1dTrafficClassPriority	1.3.6.1.2.1.17.6.1.2.3.1.1	Integer32	not-accessible	The Priority value determined for the received frame. This value is equivalent to the priority indicated in the tagged frame received, or one of the evaluated priorities, determined according to the media-type. For untagged frames received from Ethernet media, this value is equal to the dot1dPortDefaultUserPriority value for the ingress port. For untagged frames received from non-Ethernet media, this value is equal to the dot1dRegenUserPriority value for the ingress port and media-specific user priority.
dot1dTrafficClassTable	1.3.6.1.2.1.17.6.1.2.3		not-accessible	A table mapping evaluated User Priority to Traffic Class, for forwarding by the bridge. Traffic class is a number in the range (0..(dot1dPortNumTrafficClasses-1)).
I32 dot1dUserPriority	1.3.6.1.2.1.17.6.1.2.2.1.1	Integer32	not-accessible	The User Priority for a frame received on this port.
dot1dUserPriorityRegenEntry	1.3.6.1.2.1.17.6.1.2.2.1		not-accessible	A mapping of incoming User Priority to a Regenerated User Priority.
dot1dUserPriorityRegenTable	1.3.6.1.2.1.17.6.1.2.2		not-accessible	A list of Regenerated User Priorities for each received User Priority on each port of a bridge. The Regenerated User Priority value may be used to index the Traffic Class Table for each input port. This only has effect on media that support native User Priority. The default values for Regenerated User Priorities are the same as the User Priorities.
pBridgeAccessPriorityGroup	1.3.6.1.2.1.17.6.2.1.7			A collection of objects defining the media-dependent outbound access level for each priority.
pBridgeCompliance	1.3.6.1.2.1.17.6.2.2.1			The compliance statement for device support of Priority and Multicast Filtering extended bridging services.
pBridgeCompliance2	1.3.6.1.2.1.17.6.2.2.2			The compliance statement for device support of Priority and Multicast Filtering extended bridging services.
pBridgeCompliances	1.3.6.1.2.1.17.6.2.2
pBridgeConformance	1.3.6.1.2.1.17.6.2
pBridgeDefaultPriorityGroup	1.3.6.1.2.1.17.6.2.1.4			A collection of objects defining the User Priority applicable to each port for media that do not support native User Priority.
pBridgeDeviceGmrpGroup	1.3.6.1.2.1.17.6.2.1.2			A collection of objects providing device-level control for the Multicast Filtering extended bridge services.
pBridgeDevicePriorityGroup	1.3.6.1.2.1.17.6.2.1.3			A collection of objects providing device-level control for the Priority services.
pBridgeExtCapGroup	1.3.6.1.2.1.17.6.2.1.1			A collection of objects indicating the optional capabilities of the device.
pBridgeGroups	1.3.6.1.2.1.17.6.2.1
pBridgeHCPortGroup	1.3.6.1.2.1.17.6.2.1.10			A collection of objects providing 64-bit statistics counters for high-capacity bridge ports.
pBridgeMIB	1.3.6.1.2.1.17.6			The P-Bridge MIB module for provider bridges.
pBridgeMIBObjects	1.3.6.1.2.1.17.6.1
pBridgePortGarpGroup	1.3.6.1.2.1.17.6.2.1.8			A collection of objects providing port level control and status information for GARP operation.
pBridgePortGmrpGroup	1.3.6.1.2.1.17.6.2.1.9			A collection of objects providing port level control and status information for GMRP operation.
pBridgePortGmrpGroup2	1.3.6.1.2.1.17.6.2.1.12			A collection of objects providing port level control and status information for GMRP operation.
pBridgePortOverflowGroup	1.3.6.1.2.1.17.6.2.1.11			A collection of objects providing overflow statistics counters for high-capacity bridge ports.
pBridgePriorityGroup	1.3.6.1.2.1.17.6.2.1.6			A collection of objects defining the traffic classes within a bridge for each evaluated User Priority.
pBridgeRegenPriorityGroup	1.3.6.1.2.1.17.6.2.1.5			A collection of objects defining the User Priorities applicable to each port for media that support native User Priority.

RFC description

Provider Bridges MIB for managing provider edge bridging features, VLAN-related parameters, and bridge port mappings (RFC 4363).

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Download P-BRIDGE-MIB

What Is P-BRIDGE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description