All MIBs › NMS-STP › stpPortOptfRootLoopGuard
stpPortOptfRootLoopGuard
Module: NMS-STP
OID (symbolic): NMS-STP::stpPortOptfRootLoopGuard
OID (numeric): 1.3.6.1.4.1.11606.10.9.253.7.1.5
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: Root Guard prevents a port that is receiving superior BPDUs from becoming root port.
In SSTP and PVST modes, if a Root Guard-enabled port is receiving superior BPDUs, it is always blocked.
In RSTP and MSTP modes, if a Root Guard-enabled port originally didn't receive superior BPDUs, but now it is receiving superior BPUDs, it is blocked.
Loop guard prevents alternate and root ports from becoming designated ports.
In SSTP and PVST modes, if a Loop guard-enabled port is designated port, it is always blocked.
In RSTP and MSTP modes, if a Loop guard-enabled port becomes designated port because of a failure that can't receive BPDUs, it is blocked.
What is stpPortOptfRootLoopGuard?
This object is a read-write per-port INTEGER (no/rootGuard/loopGuard/disabled) combining Root Guard, which blocks a port that starts receiving superior BPDUs so it cannot become root port, with Loop Guard, which blocks a port that becomes a designated port after losing BPDU reception. Administrators apply it per-port, indexed by ifIndex, to protect the spanning-tree root placement or prevent unidirectional-link loops on that specific interface. For example, setting stpPortOptfRootLoopGuard to rootGuard(1) on a port facing a customer or access-layer switch stops that neighbor from ever becoming the root bridge.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.11606.10.9.253.7.1.5 snmpwalk -v2c -c public <target> NMS-STP::stpPortOptfRootLoopGuard
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.11606.10.9.253.7.1.5.1 snmpget -v2c -c public <target> NMS-STP::stpPortOptfRootLoopGuard.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.11606.10.9.253.7.1.5.1 i <value>
Start monitoring nms Co., Ltd. switch (STP/RSTP/MSTP hardening features, vendor unidentified) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the NMS-STP::stpPortOptfRootLoopGuard OID value, configure state conditions and alerts, and monitor any nms Co., Ltd. switch (STP/RSTP/MSTP hardening features, vendor unidentified) from a single console.
OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.11606 | pbn | PBN-ROOT |
| 1.3.6.1.4.1.11606.10 | nms | NMS-SMI |
| 1.3.6.1.4.1.11606.10.9 | nmsMgmt | NMS-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.11606.10.9.253 | stp | NMS-STP |
| 1.3.6.1.4.1.11606.10.9.253.7 | stpPortOptfTable | NMS-STP |
| 1.3.6.1.4.1.11606.10.9.253.7.1 | stpPortOptfTableEntry | NMS-STP |
| 1.3.6.1.4.1.11606.10.9.253.7.1.5 | stpPortOptfRootLoopGuard | NMS-STP |