LLDP-EXT-PNO-MIB

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Organization: PROFIBUS International (PNO)

Last Updated: 2006-03-09

Category: Protocol: LLDP

Description: PROFIBUS/PROFINET extension to LLDP, defined by PROFIBUS International, for PROFINET-specific TLV discovery within industrial networks.

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What Is LLDP-EXT-PNO-MIB?

LLDP-EXT-PNO-MIB is a PROFIBUS/PROFINET LLDP extension MIB, defined by PROFIBUS International (PNO), that adds PROFINET-specific organizationally-defined TLVs to standard LLDP discovery for industrial automation networks. It exposes configuration objects controlling which PROFINET TLVs (SPD, port status, alias, MRP) are transmitted per port, and local data objects holding discovered PROFINET-specific values such as line propagation delay and port send/receive delay. It is used to monitor the software/protocol status of PROFINET neighbor discovery and network delay characteristics, which in industrial real-time Ethernet networks is critical for verifying deterministic timing and ring redundancy (MRP) configuration between connected devices. It explicitly depends on and extends the base IEEE 802.1AB LLDP-MIB framework, following the same organizationally-defined-extension pattern as other LLDP-EXT modules. It is typically deployed on industrial Ethernet switches and PROFINET field devices in factory automation networks to verify topology discovery and network timing, with administrators keeping the LLDP-EXT-PNO-MIB reference on hand when validating these PROFINET-specific TLVs.

IPNetwork Monitor allows you to monitor SNMP objects defined in LLDP-EXT-PNO-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

vendor-neutral, PROFIBUS International standards-based MIB, not tied to a specific manufacturer
industrial Ethernet switches
PROFINET field devices

Monitoring Examples

An administrator would poll lldpXPnoConfigTable (via lldpXPnoConfigEntry) to check lldpXPnoConfigMrpTxEnable and lldpXPnoConfigPortStatusTxEnable, confirming whether Media Redundancy Protocol and port status TLVs are being advertised on a given port. lldpXPnoLocTable/lldpXPnoLocEntry would then be checked for lldpXPnoLocLPDValue (line propagation delay) and lldpXPnoLocPortTxDValue/lldpXPnoLocPortRxDValue, revealing an abnormal cable delay or asymmetric port delay that could disrupt PROFINET's deterministic real-time communication, while lldpXPnoLocPortStatusRT2 flags PROFINET real-time class 2 port status issues.

What Can Be Monitored

PROFINET TLV transmit enable status per port
line propagation delay
port transmit/receive delay
PROFINET real-time class 2 port status
MRP TLV advertisement status

Imported Objects

From LLDP-MIB

lldpExtensions	OBJECT-IDENTITY
lldpLocPortNum	OBJECT-TYPE
lldpPortConfigEntry	OBJECT-TYPE
lldpRemIndex	OBJECT-TYPE
lldpRemLocalPortNum	OBJECT-TYPE
lldpRemTimeMark	OBJECT-TYPE

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
TruthValue

How to Use in IPNetwork Monitor

Example using lldpXPnoLocPortStatusRT2 OID:

Select a device implementing LLDP-EXT-PNO-MIB as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type lldpXPnoLocPortStatusRT2 into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. This value represents the status of the corresponding port of the local system according to RT class 2. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is anything other than 'running', since that indicates the condition this object reports has changed to one worth investigating. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
lldpXPnoMIB	1.0.8802.1.1.2.1.5.3791			The LLDP Management Information Base extension module for PROFINET organizationally defined discovery information. Copyright (C) PROFIBUS Nutzerorganisation e.V. (2005).
lldpXPnoObjects	1.0.8802.1.1.2.1.5.3791.1
lldpXPnoConfig	1.0.8802.1.1.2.1.5.3791.1.1
lldpXPnoConfigTable	1.0.8802.1.1.2.1.5.3791.1.1.1		not-accessible	A table that controls selection of LLDP TLVs to be transmitted on individual ports.
lldpXPnoConfigEntry	1.0.8802.1.1.2.1.5.3791.1.1.1.1		not-accessible	LLDP configuration information that controls the transmission of PNO organizationally defined TLVs on LLDP transmission capable ports. This configuration object augments the lldpPortConfigEntry of the LLDP-MIB, therefore it is only present along with the port configuration defined by the associated lldpPortConfigEntry entry. Each active lldpXPnoConfigEntry must be restored from non-volatile storage (along with the corresponding lldpPortConfigEntry) after a re-initialization of the management system.
T/F lldpXPnoConfigSPDTxEnable	1.0.8802.1.1.2.1.5.3791.1.1.1.1.1	TruthValue	read-write	The lldpXPnoConfigSPDTxEnable, which is defined as a truth value and configured by the network management, determines whether the PNO organizationally defined signal propagation delay TLV transmission is allowed on a given LLDP transmission capable port. The signal propagation delay is composed of the port transmission delay, the port receiving delay and the line delay. These values can't be transmitted independently of each other. The value of this object must be restored from nonvolatile storage after a re-initialization of the management system.
T/F lldpXPnoConfigPortStatusTxEnable	1.0.8802.1.1.2.1.5.3791.1.1.1.1.2	TruthValue	read-write	The lldpXPnoConfigPortStatusTxEnable, which is defined as a truth value and configured by the network management, determines whether the PNO organizationally defined RT port status TLV transmission is allowed on a given LLDP transmission capable port. The value of this object must be restored from nonvolatile storage after a re-initialization of the management system.
T/F lldpXPnoConfigAliasTxEnable	1.0.8802.1.1.2.1.5.3791.1.1.1.1.3	TruthValue	read-write	The lldpXPnoConfigAliasTxEnable, which is defined as a truth value and configured by the network management, determines whether the PNO organizationally defined alias TLV (chassisId) transmission is allowed on a given LLDP transmission capable port. The value of this object must be restored from nonvolatile storage after a re-initialization of the management system.
T/F lldpXPnoConfigMrpTxEnable	1.0.8802.1.1.2.1.5.3791.1.1.1.1.4	TruthValue	read-write	The lldpXPnoConfigMrpTxEnable, which is defined as a truth value and configured by the network management, determines whether the PNO organizationally defined MRP TLV transmission is allowed on a given LLDP transmission capable port. The value of this object must be restored from nonvolatile storage after a re-initialization of the management system.
lldpXPnoLocalData	1.0.8802.1.1.2.1.5.3791.1.2
lldpXPnoLocTable	1.0.8802.1.1.2.1.5.3791.1.2.1		not-accessible	This table contains one row per port for PNO organizationally defined LLDP extension on the local system known to this agent.
lldpXPnoLocEntry	1.0.8802.1.1.2.1.5.3791.1.2.1.1		not-accessible	Additional information about a particular port component. This object is indexed by the lldpLocPortNum of the LLDP-MIB, therefore it is only present along with the port entry defined by the associated lldpLocPortEntry entry. Each active lldpXPnoLocEntry must be restored from non-volatile storage (along with the corresponding lldpLocPortEntry) after a re-initialization of the management system.
U32 lldpXPnoLocLPDValue	1.0.8802.1.1.2.1.5.3791.1.2.1.1.1	Unsigned32	read-only	This integer value represents the line propagation delay in nanoseconds which was measured by the local system on the corresponding port. A value of zero shall be used if the system either could not accomplish the measurement or does not support such a measurement.
U32 lldpXPnoLocPortTxDValue	1.0.8802.1.1.2.1.5.3791.1.2.1.1.2	Unsigned32	read-only	This integer value represents the PortTxDelay in nanoseconds which was measured by the local system on the corresponding port. A value of zero shall be used if the system either could not accomplish the measurement or does not support such a measurement.
U32 lldpXPnoLocPortRxDValue	1.0.8802.1.1.2.1.5.3791.1.2.1.1.3	Unsigned32	read-only	This integer value represents the PortRxDelay in nanoseconds which was measured by the local system on the corresponding port. A value of zero shall be used if the system either could not accomplish the measurement or does not support such a measurement.
INT lldpXPnoLocPortStatusRT2Ex	1.0.8802.1.1.2.1.5.3791.1.2.1.1.4	INTEGER	read-only	This value represents the status of the corresponding port of the local system according to RT class 2. A value of off(0) means that there isn't any RT2 capability available for this port. When the port is configured for RT2 mode, but the mode isn't active yet the value will be configured(1). If the RT2 mode is configured for this port and the mode is active, the value will be running(2).
INT lldpXPnoLocPortStatusRT3	1.0.8802.1.1.2.1.5.3791.1.2.1.1.5	INTEGER	read-only	This value represents the status of the corresponding port of the local system according to RT class 3. A value of off(0) means that there isn't any RT3 capability available for this port. When the port is configured for RT3 mode, but the mode isn't active yet the value will be configured(1). When the port is ready for transmission and reception of RT3 traffic, the port status will be running(4).
STR lldpXPnoLocPortNoS	1.0.8802.1.1.2.1.5.3791.1.2.1.1.6	DisplayString	read-only	The local PROFINET NameofStation. If the station isn't configured yet, the value of this object will be the MAC address of the device as a string.
OCT lldpXPnoLocPortMrpUuId	1.0.8802.1.1.2.1.5.3791.1.2.1.1.7	OCTET STRING	read-only	The UUID of the MRP domain to which this port belongs to. If the port doesn't belong to a MRP domain, the value must be NIL ('0000000000000000').
INT lldpXPnoLocPortMrrtStatus	1.0.8802.1.1.2.1.5.3791.1.2.1.1.8	INTEGER	read-only	This object reports the status of the MRRT entity of the corresponding port. A value of off(0) means that there isn't any MRRT capability available for this port or it is switched off. The value configured(1) indicates that MRRT is configured for the port. When MRRT is active on the port, the value will be up(2).
lldpXPnoRemoteData	1.0.8802.1.1.2.1.5.3791.1.3
lldpXPnoRemTable	1.0.8802.1.1.2.1.5.3791.1.3.1		not-accessible	This table contains one or more rows per physical network connection known to this agent. The agent may wish to ensure that only one lldpXPnoRemEntry is present for each local port, or it may choose to maintain multiple lldpXPnoRemEntries for the same local port.
lldpXPnoRemEntry	1.0.8802.1.1.2.1.5.3791.1.3.1.1		not-accessible	Each entry represents the received information of the communication partner on this physical connection. The entries feature multiple indices from the lldpRemEntry of the LLDP-MIB, therefore it is only present along with the description defined by the associated lldpRemEntry entry.
U32 lldpXPnoRemLPDValue	1.0.8802.1.1.2.1.5.3791.1.3.1.1.1	Unsigned32	read-only	This integer value represents the line propagation delay in nanoseconds which was measured by the remote system on the corresponding port. A value of zero shall be used if the remote system either could not accomplish the measurement or does not support such a measurement.
U32 lldpXPnoRemPortTxDValue	1.0.8802.1.1.2.1.5.3791.1.3.1.1.2	Unsigned32	read-only	This integer value represents the PortTxDelay in nanoseconds which was measured by the remote system on the corresponding port. A value of zero shall be used if the remote system either could not accomplish the measurement or does not support such a measurement.
U32 lldpXPnoRemPortRxDValue	1.0.8802.1.1.2.1.5.3791.1.3.1.1.3	Unsigned32	read-only	This integer value represents the PortRxDelay in nanoseconds which was measured by the remote system on the corresponding port. A value of zero shall be used if the remote system either could not accomplish the measurement or does not support such a measurement.
INT lldpXPnoRemPortStatusRT2	1.0.8802.1.1.2.1.5.3791.1.3.1.1.4	INTEGER	read-only	This value represents the status of the corresponding port of the remote system according to RT class 2. A value of off(0) means that there isn't any RT2 capability available for this port. When the port is configured for RT2 mode, but the mode isn't active yet the value will be configured(1). If the RT2 mode is configured for this port and the mode is active, the value will be running(2).
INT lldpXPnoRemPortStatusRT3	1.0.8802.1.1.2.1.5.3791.1.3.1.1.5	INTEGER	read-only	This value represents the status of the corresponding port of the remote system according to RT class 3. A value of off(0) means that there isn't any RT3 capability available for this port. When the port is configured for RT3 mode, but the mode isn't active yet the value will be configured(1). When the port is ready for transmission and reception of RT3 traffic, the port status will be running(4).
STR lldpXPnoRemPortNoS	1.0.8802.1.1.2.1.5.3791.1.3.1.1.6	DisplayString	read-only	The PROFINET NameofStation of the remote partner. If the station isn't configured yet, the value of this object will be the MAC address of the device as a string.
OCT lldpXPnoRemPortMrpUuId	1.0.8802.1.1.2.1.5.3791.1.3.1.1.7	OCTET STRING	read-only	The UUID of the MRP domain to which the corresponding port of the remote system belongs to. If the port doesn't belong to a MRP domain, the value must be NIL ('0000000000000000').
INT lldpXPnoRemPortMrrtStatus	1.0.8802.1.1.2.1.5.3791.1.3.1.1.8	INTEGER	read-only	This object reports the status of the MRRT entity of the corresponding port. A value of off(0) means that there isn't any MRRT capability available for this port or it is switched off. The value configured(1) indicates that MRRT is configured for the port. When MRRT is active on the port, the value will be up(2).
lldpXPnoConformance	1.0.8802.1.1.2.1.5.3791.2
lldpXPnoCompliances	1.0.8802.1.1.2.1.5.3791.2.1
lldpXPnoCompliance	1.0.8802.1.1.2.1.5.3791.2.1.1			The compliance statement for SNMP entities which implement the PNO organizationally defined LLDP extension MIB.
lldpXPnoGroups	1.0.8802.1.1.2.1.5.3791.2.2
lldpXPnoConfigGroup	1.0.8802.1.1.2.1.5.3791.2.2.1			The collection of objects which are used to configure the PNO organizationally defined LLDP extension implementation behavior. This group is mandatory for agents which implement the PNO organizationally defined LLDP extension, because the information about the signal propagation delay is necessary to configure PROFINET domains.
lldpXPnoLocGroup	1.0.8802.1.1.2.1.5.3791.2.2.2			The collection of objects which are used to configure the PNO organizationally defined LLDP extension implementation behavior. This group is mandatory for agents which implement the PNO organizationally defined LLDP extension, because the information about the signal propagation delay is necessary to configure PROFINET domains.
lldpXPnoRemGroup	1.0.8802.1.1.2.1.5.3791.2.2.3			The collection of objects which are used to configure the PNO organizationally defined LLDP extension implementation behavior. This group is mandatory for agents which implement the PNO organizationally defined LLDP extension, because the information about the signal propagation delay is necessary to configure PROFINET domains.
lldpXPnoMRPGroup	1.0.8802.1.1.2.1.5.3791.2.2.4			The collection of objects which are used to configure the PNO organizationally defined LLDP extension implementation behavior. This group is mandatory for agents which implement the PNO organizationally defined LLDP extension, because the information about the signal propagation delay is necessary to configure PROFINET domains.

RFC description

PROFIBUS/PROFINET LLDP extension MIB defined by PROFIBUS International for PROFINET-specific TLV discovery in industrial networks.

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Download LLDP-EXT-PNO-MIB