NMS-EPON-OLT-COMM

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Category: GPON/EPON

Description: Manages NMS Communications EPON OLT common configuration including PON port and system settings.

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What Is NMS-EPON-OLT-COMM?

NMS-EPON-OLT-COMM is a vendor-specific MIB (module NMS-EPON-OLT-COMM, under the nmsEPONGroup enterprise branch) that manages common, chassis-wide configuration for an EPON Optical Line Terminal, covering link-layer encryption, IGMP-based multicast control, and PON bandwidth-allocation policy. It exposes objects such as oltEncrypStatus/oltEncrypMode and oltRekeyingTime for OAM link encryption, oltMCSTStatus/oltMCSTMode/oltIGMPProxyStatus/oltIGMPQuerierAddress for IGMP snooping versus CTC dynamic-controllable multicast, per-version IGMP packet counters (oltV1Packets, oltV2Packets, oltV3Packets, oltJoinsPackets, oltLeavesPackets), and dynamic bandwidth allocation settings (oltDBAMode, oltDBAAlgorithm, oltIfDbaParamCycleTime/DiscFreq/DiscTime). It also covers storm-control thresholds (oltStormControlBroadcast/Multicast/Unicast) and per-ONU status via oltOnuStatusBitstring. This data helps operators confirm that multicast replication, OAM link security, and PON scheduling are behaving correctly across all ONUs served by an OLT port. It depends on the broader EPON OLT chassis MIB tree (NMS-SMI) and is deployed on EPON access-network head-end equipment alongside per-port and per-ONU MIB modules; administrators can download the NMS-EPON-OLT-COMM file to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in NMS-EPON-OLT-COMM. 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

EPON OLT chassis platforms implementing the NMS-SMI enterprise MIB tree

Monitoring Examples

An operator polls oltDLFDrop and the IGMP packet counters (oltV2Packets, oltJoinsPackets, oltLeavesPackets) to confirm multicast traffic is being properly snooped and forwarded, then checks oltOnuStatusBitstring; a bit indicating an ONU status change combined with a spike in leave-packet counts would point to a multicast subscriber flapping off the PON.

What Can Be Monitored

encryption enable/mode and rekeying timer
IGMP snooping vs. dynamic-controllable multicast mode
per-IGMP-version packet counters
DBA mode/algorithm and cycle-time parameters
storm-control thresholds
per-ONU status bitstring

Imported Objects

From NMS-SMI

nmsEPONGroup

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
Counter32
IpAddress

From RFC1213-MIB

DisplayString
ifIndex

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
nmsEponOltComm	1.3.6.1.4.1.11606.10.101.1
INT oltEncrypStatus	1.3.6.1.4.1.11606.10.101.1.1	INTEGER	read-write	global-level encryption enable or disable for an OLT.
INT oltEncrypMode	1.3.6.1.4.1.11606.10.101.1.2	INTEGER	read-write	global-level encryption mode for an OLT.
INT oltRekeyingTime	1.3.6.1.4.1.11606.10.101.1.3	INTEGER	read-write	Rekeying timer (in milli-seconds) , range is 600-10000.
INT oltLocalLostLinkTimeout	1.3.6.1.4.1.11606.10.101.1.4	INTEGER	read-write	Local lost link timeout between OAMs, range is 2-30s.
INT oltVlanTransparentMode	1.3.6.1.4.1.11606.10.101.1.5	INTEGER	read-write	OLT Vlan Transparent Mode.
INT oltHostQueryFreq	1.3.6.1.4.1.11606.10.101.1.6	INTEGER	read-write	The frequency at which IGMP Host-Query packets are transmitted on OLT.
INT oltMCSTStatus	1.3.6.1.4.1.11606.10.101.1.7	INTEGER	read-write	EPON Multicast status(enable or disable).
INT oltMCSTMode	1.3.6.1.4.1.11606.10.101.1.8	INTEGER	read-write	Config multicast mode.0-IGMP Snooping, 1-CTC dynamic controllable multicast.Only dynamic-controllable(1) is supported.
INT oltIGMPProxyStatus	1.3.6.1.4.1.11606.10.101.1.9	INTEGER	read-write	EPON IGMP Proxy status(enable or disable). IGMP proxy can't be shut in dynamic-controllable mode.
IP oltIGMPQuerierAddress	1.3.6.1.4.1.11606.10.101.1.10	IpAddress	read-write	The address of the IGMP Querier of OLT self.
INT oltQueryMaxResponseTime	1.3.6.1.4.1.11606.10.101.1.11	INTEGER	read-write	The maximum query response time advertised in IGMPv2 queries(in milli-seconds).
INT oltLastMemberQueryInterval	1.3.6.1.4.1.11606.10.101.1.12	INTEGER	read-write	The Last Member Query Interval is the Max Response Time inserted into Group-Specific Queries sent in response to Leave Group messages, and is also the amount of time between Group-Specific Query messages. This value may be tuned to modify the leave latency of the network. A reduced value results in reduced time to detect the loss of the last member of a group. The value of this object is irrelevant if IGMP Version is 1.
INT oltLastMemberQueryCount	1.3.6.1.4.1.11606.10.101.1.13	INTEGER	read-write	The Last Member Query Count.
INT oltDLFDrop	1.3.6.1.4.1.11606.10.101.1.14	INTEGER	read-only	OLT Multicast Drop Status.
C32 oltV1Packets	1.3.6.1.4.1.11606.10.101.1.15	Counter32	read-only	The number of IGMP V1 packets has been received.
C32 oltV2Packets	1.3.6.1.4.1.11606.10.101.1.16	Counter32	read-only	The number of IGMP V2 packets has been received.
C32 oltV3Packets	1.3.6.1.4.1.11606.10.101.1.17	Counter32	read-only	The number of IGMP V3 packets has been received.
C32 oltJoinsPackets	1.3.6.1.4.1.11606.10.101.1.18	Counter32	read-only	The number of IGMP join packets has been received.
C32 oltLeavesPackets	1.3.6.1.4.1.11606.10.101.1.19	Counter32	read-only	The number of IGMP leaves packets has been received.
C32 oltGeneralQueryPackets	1.3.6.1.4.1.11606.10.101.1.20	Counter32	read-only	The number of IGMP General Query packets has been received.
C32 oltSpecialQueryPackets	1.3.6.1.4.1.11606.10.101.1.21	Counter32	read-only	The number of IGMP Special Query packets has been received.
INT oltDBAMode	1.3.6.1.4.1.11606.10.101.1.22	INTEGER	read-write	olt DBA mode.
INT oltDBAAlgorithm	1.3.6.1.4.1.11606.10.101.1.23	INTEGER	read-write	olt DBA algorithm.
OCT oltPriorityQueueMaping	1.3.6.1.4.1.11606.10.101.1.24	OCTET STRING	read-write	olt Priority Queue Maping.
INT oltSchedulePolicy	1.3.6.1.4.1.11606.10.101.1.25	INTEGER	read-write	olt Schedule Policy.
OCT oltWRRScheduleQueuePriority	1.3.6.1.4.1.11606.10.101.1.26	OCTET STRING	read-write	olt WRR Schedule Queue Priority.
INT oltDefaultCoS	1.3.6.1.4.1.11606.10.101.1.27	INTEGER	read-write	olt Default CoS value.
INT oltMacAgingTime	1.3.6.1.4.1.11606.10.101.1.28	INTEGER	read-write	olt Mac Address Aging Time.
INT oltFlowControl	1.3.6.1.4.1.11606.10.101.1.29	INTEGER	read-write	olt Flow Control status.
INT oltStormControlBroadcast	1.3.6.1.4.1.11606.10.101.1.30	INTEGER	read-write	olt Storm Control Broadcast, range is 10-1000000kbps
INT oltStormControlMulticast	1.3.6.1.4.1.11606.10.101.1.31	INTEGER	read-write	olt Storm Control Multicast, range is 10-1000000kbps
INT oltStormControlUnicast	1.3.6.1.4.1.11606.10.101.1.32	INTEGER	read-write	olt Storm Control Unicast, range is 10-1000000kbps
INT oltIfDbaParamCycleTime	1.3.6.1.4.1.11606.10.101.1.33	INTEGER	read-write	PON interface DBA parameter cycle time. Range is HW DBA 25000 to 1000000 >>software, DBA 125000 to 1000000.
INT oltIfDbaParamDiscFreq	1.3.6.1.4.1.11606.10.101.1.34	INTEGER	read-write	PON interface DBA parameter discovery frequency. Range is 0-255.
INT oltIfDbaParamDiscTime	1.3.6.1.4.1.11606.10.101.1.35	INTEGER	read-write	PON interface DBA parameter discovery time. Range is 1024-14000.
ROW oltIfDbaParamRowStatus	1.3.6.1.4.1.11606.10.101.1.36	RowStatus	read-write	PON interface DBA parameter row status.
INT oltLlidPortCreateMode	1.3.6.1.4.1.11606.10.101.1.37	INTEGER	read-write	A switch for creating LLID port without binding ONU alone. Dafault value is close(2). If this value is open(1), the llidCreateTable can create a llid port without binding ONU.
OCT oltOnuStatusBitstring	1.3.6.1.4.1.11606.10.101.1.38	OCTET STRING	read-only	Onu Status bitstring.Each bit means corresponding ONU status.

RFC description

NMS EPON OLT common management MIB for encryption, rekeying, VLAN transparency, and OAM configuration.

Start monitoring EPON OLT chassis platform implementing the NMS-SMI enterprise MIB tree 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.

Download NMS-EPON-OLT-COMM

What Is NMS-EPON-OLT-COMM?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description