Juniper-BRIDGE-ETHERNET-MIB

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Organization: Juniper Networks, Inc.

Last Updated: 2005-12-14

Category: Technology: Bridging, Technology: VLAN, Vendor: Juniper

Description: Provides managed objects for bridged Ethernet interface monitoring and 802.1D spanning tree on Juniper Networks E-series routers.

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What Is Juniper-BRIDGE-ETHERNET-MIB?

This Juniper enterprise MIB covers bridged Ethernet interfaces on E-series routers and their participation in 802.1D transparent bridging. It exposes configuration and status data per bridged Ethernet interface: interface index mapping, lower-layer interface linkage, proxy ARP setting, MTU, layer/bridging mode, and row status for interface creation/deletion. Monitoring emphasis is primarily on software/configuration status of the bridging layer — juniBridgedEthernetIfRowStatus reveals whether an interface entry is active or still being provisioned, and the interface-to-lower-interface linkage is used to confirm a bridged interface is correctly mapped onto its physical port, important for diagnosing bridging or spanning-tree topology issues. This MIB supplements the standard IF-MIB and BRIDGE-MIB (RFC 1493) definitions since it layers bridged-Ethernet-specific attributes on top of standard interface/bridge objects. It is deployed on Juniper E-series edge/aggregation routers providing Layer 2 bridged Ethernet services alongside routed interfaces. Engineers can download the Juniper-BRIDGE-ETHERNET-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Juniper-BRIDGE-ETHERNET-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

Juniper E-Series router (bridged Ethernet/Layer 2 service)

Monitoring Examples

Polling juniBridgedEthernetIfTable/juniBridgedEthernetIfEntry by juniBridgedEthernetIfIfIndex lets an operator confirm juniBridgedEthernetIfLowerIfIndex correctly maps a bridged interface onto its physical port, and check juniBridgedEthernetIfRowStatus to verify the interface is active rather than stuck in a notInService state. juniBridgedEthernetProxyArp and juniBridgedEthernetIfMtu would be checked to confirm proxy ARP and MTU settings match the intended bridging configuration, useful when troubleshooting why a bridged segment isn't forwarding as expected.

What Can Be Monitored

bridged interface to physical port mapping
interface row/provisioning status
proxy ARP setting
interface MTU configuration

Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From Juniper-MIBs

juniMibs

MODULE-IDENTITY

From Juniper-TC

JuniNextIfIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
juniBridgeEthernetMIB	1.3.6.1.4.1.4874.2.2.31			The Bridge Ethernet MIB for the Juniper Networks enterprise.
juniBridgedEthernetObjects	1.3.6.1.4.1.4874.2.2.31.1
juniBridgedEthernetIfLayer	1.3.6.1.4.1.4874.2.2.31.1.1
JUN juniBridgedEthernetNextIfIndex	1.3.6.1.4.1.4874.2.2.31.1.1.1	JuniNextIfIndex	read-only	Coordinate ifIndex value allocation for entries in juniBridgedEthernetIfTable. A GET of this object returns the next available ifIndex value to be used to create an entry in the associated interface table; or zero, if no valid ifIndex value is available. This object also returns a value of zero when it is the lexicographic successor of a varbind presented in an SNMP GETNEXT or GETBULK request, for which circumstance it is assumed that ifIndex allocation is unintended. Successive GETs will typically return different values, thus avoiding collisions among cooperating management clients seeking to create table entries simultaneously.
juniBridgedEthernetIfTable	1.3.6.1.4.1.4874.2.2.31.1.1.2		not-accessible	The parameters for the BridgedEthernet service on this interface.
juniBridgedEthernetIfEntry	1.3.6.1.4.1.4874.2.2.31.1.1.2.1		not-accessible	The Parameters for a particular Bridged Ethernet interface. Creating/deleting entries in this table causes corresponding entries for be created/deleted in ifTable/ifXTable/juniIfTable.
NUM juniBridgedEthernetIfIfIndex	1.3.6.1.4.1.4874.2.2.31.1.1.2.1.1	InterfaceIndex	read-only	The ifIndex value of the corresponding ifEntry.
INT juniBridgedEthernetProxyArp	1.3.6.1.4.1.4874.2.2.31.1.1.2.1.2	INTEGER	read-create	The proxyArp configuration setting for this entry. * NOTE: This MIB object has been obsoleted. *
NUM juniBridgedEthernetIfLowerIfIndex	1.3.6.1.4.1.4874.2.2.31.1.1.2.1.3	InterfaceIndexOrZero	read-create	The ifIndex of an interface over which this Bridged Ethernet interface is to be layered. A value of zero indicates no layering. An implementation may choose to require that a nonzero value be configured at entry creation.
ROW juniBridgedEthernetIfRowStatus	1.3.6.1.4.1.4874.2.2.31.1.1.2.1.4	RowStatus	read-create	Controls creation/deletion of entries in this table according to the RowStatus textual convention, constrained to support the following values only: createAndGo destroy To create an entry in this table, the following entry objects MUST be explicitly configured: juniBridgedEthernetIfRowStatus juniBridgedEthernetIfLowerIfIndex In addition, when creating an entry the following conditions must hold: A value for juniBridgedEthernetIfIndex must have been determined previously, by reading juniBridgedEthernetNextIfIndex. The interface identified by juniBridgedEthernetIfLowerIfIndex must exist, and must be an interface type that permits layering of Bridged Ethernet above it. A corresponding entry in ifTable/ifXTable/juniIfTable is created/destroyed as a result of creating/destroying an entry in this table.
I32 juniBridgedEthernetIfMtu	1.3.6.1.4.1.4874.2.2.31.1.1.2.1.5	Integer32	read-create	The configured maximum transfer unit (MTU) for this ethernet interface. The operational value is reported in the corresponding Interfaces MIB ifMtu object.
juniBridgeEthernetConformance	1.3.6.1.4.1.4874.2.2.31.4
juniBridgeEthernetCompliances	1.3.6.1.4.1.4874.2.2.31.4.1
juniBridgedEthernetCompliance	1.3.6.1.4.1.4874.2.2.31.4.1.1			The compliance statement for entities which implement the Juniper bridged Ethernet MIB. This statement became deprecated when additional configuration for Bridged Ethernet was added.
juniBridgedEthernetCompliance2	1.3.6.1.4.1.4874.2.2.31.4.1.2			The compliance statement for entities which implement the Juniper bridged Ethernet MIB.
juniBridgeEthernetGroups	1.3.6.1.4.1.4874.2.2.31.4.2
juniBridgedEthernetGroup	1.3.6.1.4.1.4874.2.2.31.4.2.1			A collection of objects providing management of Bridged Ethernet interfaces in a Juniper product. This group became obsolete when juniBridgedEthernetProxyArp was made obsolete.
juniBridgedEthernetGroup2	1.3.6.1.4.1.4874.2.2.31.4.2.2			A collection of objects providing management of Bridged Ethernet interfaces in a Juniper product. This group became deprecated when the juniBridgedEthernetIfMtu object was added.
juniBridgedEthernetGroup3	1.3.6.1.4.1.4874.2.2.31.4.2.3			A collection of objects providing management of Bridged Ethernet interfaces in a Juniper product.

RFC description

Manages bridged Ethernet sublayer interfaces and virtual bridge creation/deletion on Juniper JUNOSe systems.

Start monitoring Juniper E-Series router (bridged Ethernet/Layer 2 service) 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 Juniper-BRIDGE-ETHERNET-MIB

What Is Juniper-BRIDGE-ETHERNET-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description