All MIBs › HM2-L2FORWARDING-MIB
Organization: Hirschmann Automation and Control GmbH
Last Updated: 2011-03-16
Category: Technology: Bridging, Technology: Switching/L2, Technology: VLAN, VLAN and Bridging, Vendor: Belden
Description: Hirschmann HiOS (HM2) Layer 2 forwarding MIB for MAC learning, VLAN forwarding, and switching table management.
Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) 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.
What Is HM2-L2FORWARDING-MIB?
HM2-L2FORWARDING-MIB is part of Hirschmann's HiOS (HM2) MIB family, managing Layer 2 forwarding behavior including MAC address learning, VLAN-aware/unaware forwarding modes, and switching table management on Hirschmann industrial switches. It exposes the VLAN-unaware mode's administrative and operational status alongside general forwarding and class-of-service related conformance groups. Its monitoring value lies in confirming the software-configured forwarding mode's operational state actually matches the administrative intent, for example verifying hm2L2VlanUnawareModeOperStatus reflects the configured hm2L2VlanUnawareModeAdminStatus, which is a configuration-consistency health check for the switch's forwarding plane. It is part of the broader HM2/HiOS MIB family sharing conformance and notification conventions with sibling MIBs like HM2-DOS-MITIGATION-MIB. Typical deployment is on Hirschmann industrial Ethernet switches in factory automation networks where predictable Layer 2 forwarding behavior is critical. Engineers can download the HM2-L2FORWARDING-MIB file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in HM2-L2FORWARDING-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
- Hirschmann HiOS (HM2) industrial Ethernet switch
Monitoring Examples
An administrator polls hm2L2VlanUnawareModeAdminStatus versus hm2L2VlanUnawareModeOperStatus to confirm that a configuration change to disable VLAN-unaware forwarding has actually taken operational effect on the switch. hm2L2ForwardingMibNotifications would alert if the forwarding mode's operational state unexpectedly diverges from its administrative setting, for instance after a firmware reload reverting to a default mode. hm2L2ForwGeneralGroup and hm2L2ForwClassOfServiceGroup represent the conformance groupings an NMS would use to determine which forwarding-related objects a given device instance supports.
What Can Be Monitored
- VLAN-unaware mode admin vs operational status
- L2 forwarding notifications
- forwarding conformance group support
- class-of-service forwarding group support
Imported Objects
From HM2-TC-MIB
| HmEnabledStatus | |
| hm2ConfigurationMibs | OBJECT-IDENTITY |
From SNMPv2-SMI
| Integer32 | |
| MODULE-IDENTITY | |
| OBJECT-TYPE | |
| Unsigned32 |
OIDs
RFC description
Hirschmann L2 forwarding and VLAN management with class of service configuration.
Start monitoring Hirschmann industrial Ethernet switches 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.