ENTERASYS-MSTP-MIB :: etsysMstpPortExtnNonForwardingReason

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › ENTERASYS-MSTP-MIB › etsysMstpPortExtnNonForwardingReason

etsysMstpPortExtnNonForwardingReason

Module: ENTERASYS-MSTP-MIB

OID (symbolic): ENTERASYS-MSTP-MIB::etsysMstpPortExtnNonForwardingReason

OID (numeric): 1.3.6.1.4.1.5624.1.2.28.1.4.4.1.1

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-only

Description: Indicates the reason why this port has been placed in a non-forwarding state on this MSTI (other than as a result of normal Spanning Tree protocol operation).

none(1) - the port has not been placed in a non-forwarding state due to any exceptional condition.

disputed(2) - the port has been placed in listening state because it has a designated role and an inferior designated BPDU has been received.

spanGuardLocked(3) - the port has been placed in blocking state because it is configured as an admin edge port and a BPDU has been received.

loopProtectEvent(4) - the port has been placed in listening or blocking state because a BPDU timeout has occurred and the port is awaiting reception of a type 2 BPDU on a point-to-point link.

loopProtectAdvisory(5) - the port has been placed in listening state because a BPDU timeout has occurred (as with a Loop Protect event), but this condition may be normal because the link partner does not support the Loop Protect feature.

loopbackDetected(6) - the port has been placed in blocking state because a loopback condition has been detected.

What is etsysMstpPortExtnNonForwardingReason?

Explains why this port/MSTI combination is stuck in a non-forwarding state outside of normal STP operation; for example spanGuardLocked means an edge port received an unexpected BPDU, and loopbackDetected means the switch found the port looped back to itself.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.5624.1.2.28.1.4.4.1.1
snmpwalk -v2c -c public <target> ENTERASYS-MSTP-MIB::etsysMstpPortExtnNonForwardingReason

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.5624.1.2.28.1.4.4.1.1.1
snmpget -v2c -c public <target> ENTERASYS-MSTP-MIB::etsysMstpPortExtnNonForwardingReason.1

Start monitoring Enterasys Networks switch (legacy, later Extreme Networks) (Multiple Spanning Tree Protocol, IEEE 802.1s) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ENTERASYS-MSTP-MIB::etsysMstpPortExtnNonForwardingReason OID value, configure state conditions and alerts, and monitor any Enterasys Networks switch (legacy, later Extreme Networks) (Multiple Spanning Tree Protocol, IEEE 802.1s) from a single console.

OID Breakdown

Upper-level ancestors (9 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
1.3.6.1.4.1.5624enterasysENTERASYS-MIB-NAMES
1.3.6.1.4.1.5624.1etsysMibsENTERASYS-MIB-NAMES
1.3.6.1.4.1.5624.1.2etsysModulesENTERASYS-MIB-NAMES
Numeric OIDNameModule
1.3.6.1.4.1.5624.1.2.28etsysMstpMIBENTERASYS-MSTP-MIB
1.3.6.1.4.1.5624.1.2.28.1etsysMstpObjectsENTERASYS-MSTP-MIB
1.3.6.1.4.1.5624.1.2.28.1.4etsysMstpExtnENTERASYS-MSTP-MIB
1.3.6.1.4.1.5624.1.2.28.1.4.4etsysMstpPortExtnTableENTERASYS-MSTP-MIB
1.3.6.1.4.1.5624.1.2.28.1.4.4.1etsysMstpPortExtnEntryENTERASYS-MSTP-MIB
1.3.6.1.4.1.5624.1.2.28.1.4.4.1.1etsysMstpPortExtnNonForwardingReasonENTERASYS-MSTP-MIB