All MIBs › NMS-EPON-OLT-MULTICAST-VLAN
Category: GPON/EPON, Multicast, VLAN Management
Description: Manages NMS Communications EPON OLT multicast VLAN membership and translation for downstream delivery.
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What Is NMS-EPON-OLT-MULTICAST-VLAN?
NMS-EPON-OLT-MULTICAST-VLAN is a vendor-specific MIB from NMS Communications for managing multicast VLAN configuration on an EPON (Ethernet Passive Optical Network) Optical Line Terminal (OLT), controlling how multicast traffic (typically IPTV) is delivered downstream to ONUs (Optical Network Units). It exposes configuration data defining multicast VLAN membership and VLAN-translation rules that map a subscriber-facing service VLAN to the multicast VLAN carrying broadcast/multicast video streams. While primarily a configuration MIB, it supports software-status monitoring since administrators check it to confirm multicast VLAN mappings are correctly and currently applied on the OLT, as a misconfigured or missing mapping is a common root cause of subscribers not receiving IPTV channels. It depends conceptually on standard 802.1Q VLAN tagging and multicast (IGMP snooping) concepts, layered onto the EPON access architecture. It is deployed by broadband/telecom operators delivering triple-play (voice/data/video) services over EPON fiber access networks. Engineers can download the NMS-EPON-OLT-MULTICAST-VLAN file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in NMS-EPON-OLT-MULTICAST-VLAN. 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
- NMS Communications EPON Optical Line Terminal (OLT)
Monitoring Examples
An operator would check the OLT's multicast VLAN membership table to confirm a given ONU's subscriber port is mapped into the correct multicast VLAN for the IPTV service tier that customer subscribed to. If a subscriber reports missing TV channels, the operator would inspect the VLAN translation/mapping entries to see whether the multicast VLAN binding for that port was dropped or misconfigured after a provisioning change. Since no sample objects were extracted for this MIB, this scenario is inferred from its stated purpose of managing OLT multicast VLAN membership and translation.
What Can Be Monitored
- multicast VLAN membership per ONU/port
- VLAN translation mapping
- multicast service (IPTV) delivery configuration
Imported Objects
From NMS-SMI
| nmsEPONGroup | OBJECT-IDENTITY |
From RFC-1212
| OBJECT-TYPE |
From RFC1155-SMI
| Counter | |
| IpAddress | |
| TimeTicks |
From RFC1213-MIB
| DisplayString |
From SNMPv2-TC
| MacAddress | |
| RowStatus | |
| TruthValue |
OIDs
RFC description
NMS EPON OLT multicast VLAN MIB for managing multicast group forwarding and VLAN configurations.
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