QOS-BRIDGE-MIB

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Organization: Extreme Networks

Last Updated: 2000-06-07

Category: QoS and Traffic Management

Description: Manages Extreme Networks bridge QoS configuration including per-port queue assignments and CoS-to-queue mapping.

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What Is QOS-BRIDGE-MIB?

QOS-BRIDGE-MIB is an Extreme Networks MIB (using the standard dot1dQos prefix) that extends IEEE 802.1D bridge management with Quality-of-Service objects aligned to the IETF Differentiated Services (DiffServ) architecture. It defines per-port user-priority mappings and VLAN traffic classifier tables that determine how Ethernet frames are classified into DiffServ-style queues on a bridge. Its monitoring value is primarily configuration/status of QoS classification: administrators can verify which 802.1p user priorities and VLAN classifiers are configured and their operational status, helping diagnose traffic being mis-prioritized or dropped. It explicitly depends on and complements the IETF DiffServ MIB drafts and the standard BRIDGE-MIB (802.1D) object model. It is deployed on Extreme Networks Ethernet switches in networks using DiffServ-based QoS policies. Network engineers evaluating or troubleshooting this functionality can download the QOS-BRIDGE-MIB file directly to load it into their MIB browser.

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

Extreme Networks Ethernet switch/bridge

Monitoring Examples

An administrator can inspect dot1dQosUserPriTable/dot1dQosUserPriEntry to confirm dot1dQosUserPri mappings assign the expected 802.1p priority values per port, and check dot1dQosVlanClfrTable for dot1dQosVlanStatus to verify a VLAN classifier is active. If voice traffic is experiencing jitter, the admin might find dot1dQosUserPri misconfigured on the affected port, causing voice frames to be classified into a lower-priority queue than intended.

What Can Be Monitored

802.1p user priority mapping per port
VLAN traffic classifier configuration
VLAN classifier operational status

Imported Objects

From Q-BRIDGE-MIB

dot1qVlanIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
mib-2

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
dot1dQosMib	1.3.6.1.2.1.12346			This MIB defines the additional objects necessary to manage the Quality-of-Service aspects of a bridge device that uses the IETF's Differentiated Services Architecture described in RFC 2475 and the Conceptual Model for DiffServ Routers in draft-ietf- diffserv-model-03.txt. It is to be used in conjunction with the Diffserv MIB described in draft-ietf-diffserv-mib-03.txt.
dot1dQosObjects	1.3.6.1.2.1.12346.1
dot1dQosTables	1.3.6.1.2.1.12346.2
dot1dQosUserPriTable	1.3.6.1.2.1.12346.2.1		not-accessible	A table of user_priority entries that each signifies a traffic class in 802.1D bridges. All entries exist in this table at all times. Its entries may be used as destinations for diffServClassifierFilter pointers for traffic classification purposes and for diffServActionSpecific pointers for traffic marking purposes.
dot1dQosUserPriEntry	1.3.6.1.2.1.12346.2.1.1		not-accessible	An entry that describes a single 802.1D user_priority filter.
DOT dot1dQosUserPri	1.3.6.1.2.1.12346.2.1.1.1	Dot1dUserPri	read-only	A user_priority value for the filter. Filters may be shared by multiple interfaces in the same system.
dot1dQosVlanClfrTable	1.3.6.1.2.1.12346.2.2		not-accessible	A table of VLAN entries for use in QoS classification in bridges. Its entries may be used as destinations for diffServClassifierFilter pointers for traffic classification purposes.
dot1dQosVlanClfrEntry	1.3.6.1.2.1.12346.2.2.1		not-accessible	An entry that describes a classifier element for a single 802.1Q VLAN.
ROW dot1dQosVlanStatus	1.3.6.1.2.1.12346.2.2.1.1	RowStatus	read-create	The RowStatus variable controls the activation, deactivation, or deletion of a filter for a VLAN for use in QoS classification. Note that, even though this table is indexed by dot1qVlanIndex, this does not imply that there must be an equivalent entry in either dot1qVlanCurrentTable or dot1qVlanStaticTable.
dot1dQosMIBConformance	1.3.6.1.2.1.12346.3
dot1dQosMIBCompliances	1.3.6.1.2.1.12346.3.1
dot1dQosMIBCompliance	1.3.6.1.2.1.12346.3.1.1			This MIB may be implemented as a read-only or as a read-create MIB.
dot1dQosMIBGroups	1.3.6.1.2.1.12346.3.2
dot1dQosMIBUserPriGroup	1.3.6.1.2.1.12346.3.2.1			The user_priority Group defines the MIB Objects that represent 802.1D user_priority values and describe a table of entries that may be used as destinations for diffServClassifierFilter and diffServActionSpecific pointers.
dot1dQosMIBVlanGroup	1.3.6.1.2.1.12346.3.2.2			The VLAN Group defines the MIB Objects that represent VLANs and describe a table of entries that may be used as destinations for diffServClassifierFilter pointers.

RFC description

Defines quality-of-service management objects for bridge/switch devices including traffic-class and queue configuration.

Start monitoring Extreme Networks Ethernet switch/bridge (DiffServ-style QoS classification) 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 QOS-BRIDGE-MIB

What Is QOS-BRIDGE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description