MSTP-MIB :: swMSTPInstRegionalRootBridge

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsMSTP-MIBswMSTPInstRegionalRootBridge

swMSTPInstRegionalRootBridge

Module: MSTP-MIB

OID (symbolic): MSTP-MIB::swMSTPInstRegionalRootBridge

OID (numeric): 1.3.6.1.4.1.171.12.15.2.3.1.15

Node type: OBJECT-TYPE

Type: BridgeId

Access: read-only

Description: For CIST, Regional Root Identifier is the Bridge Identifier of the single bridge in a Region whose CIST Root Port is a Boundary Port, or the Bridge Identifier of the CIST Root if that is within the Region; For MSTI,MSTI Regional Root Identifier is the Bridge Identifier of the MSTI Regional Root for this particular MSTI in this MST Region; The Regional Root Bridge of this instance.

What is swMSTPInstRegionalRootBridge?

This read-only BridgeId reports the Regional Root for this instance: for the CIST it's the bridge whose CIST Root Port is a boundary port (or the CIST Root itself if within this region); for an MSTI it's that instance's own Regional Root bridge. Admins use this to identify the root of the tree within their own MST Region for a given instance.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.171.12.15.2.3.1.15
snmpwalk -v2c -c public <target> MSTP-MIB::swMSTPInstRegionalRootBridge

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.171.12.15.2.3.1.15.1
snmpget -v2c -c public <target> MSTP-MIB::swMSTPInstRegionalRootBridge.1

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OID Breakdown

Upper-level ancestors (8 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.171d_linkDE1500-MIB
1.3.6.1.4.1.171.12dlink_common_mgmtDLINK-ID-REC-MIB
Numeric OIDNameModule
1.3.6.1.4.1.171.12.15swMSTPMIBMSTP-MIB
1.3.6.1.4.1.171.12.15.2swMSTPCtrlMSTP-MIB
1.3.6.1.4.1.171.12.15.2.3swMSTPInstanceCtrlTableMSTP-MIB
1.3.6.1.4.1.171.12.15.2.3.1swMSTPInstanceCtrlEntryMSTP-MIB
1.3.6.1.4.1.171.12.15.2.3.1.15swMSTPInstRegionalRootBridgeMSTP-MIB