All MIBs › IEEE8021-SPANNING-TREE-MIB › ieee8021SpanningTreeDesignatedRoot
ieee8021SpanningTreeDesignatedRoot
Module: IEEE8021-SPANNING-TREE-MIB
OID (symbolic): IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeDesignatedRoot
OID (numeric): 1.3.111.2.802.1.1.3.1.1.1.6
Node type: OBJECT-TYPE
Type: BridgeId
Access: read-only
Description: The Bridge identifier of the root of the spanning tree, as determined by the Spanning Tree Protocol, as executed by this node. This value is used as the Root Identifier parameter in all Configuration Bridge PDUs originated by this node.
What is ieee8021SpanningTreeDesignatedRoot?
The bridge ID of the switch this bridge currently believes is the spanning-tree root; compare this value across all switches in a VLAN to confirm they agree on the same root bridge.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.111.2.802.1.1.3.1.1.1.6 snmpwalk -v2c -c public <target> IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeDesignatedRoot
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.111.2.802.1.1.3.1.1.1.6.1 snmpget -v2c -c public <target> IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeDesignatedRoot.1
Start monitoring Vendor-neutral IEEE 802.1D/Q standard (Ethernet bridge or switch running STP) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeDesignatedRoot OID value, configure state conditions and alerts, and monitor any Vendor-neutral IEEE 802.1D/Q standard (Ethernet bridge or switch running STP) from a single console.
OID Breakdown
Upper-level ancestors (3 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.111.2.802.1.1 | ieee802dot1mibs | IEEE8021-TC-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.111.2.802.1.1.3 | ieee8021SpanningTreeMib | IEEE8021-SPANNING-TREE-MIB |
| 1.3.111.2.802.1.1.3.1 | ieee8021SpanningTreeObjects | IEEE8021-SPANNING-TREE-MIB |
| 1.3.111.2.802.1.1.3.1.1 | ieee8021SpanningTreeTable | IEEE8021-SPANNING-TREE-MIB |
| 1.3.111.2.802.1.1.3.1.1.1 | ieee8021SpanningTreeEntry | IEEE8021-SPANNING-TREE-MIB |
| 1.3.111.2.802.1.1.3.1.1.1.6 | ieee8021SpanningTreeDesignatedRoot | IEEE8021-SPANNING-TREE-MIB |