HC-RMON-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsHC-RMON-MIB

Organization: IETF RMON MIB Working Group

Last Updated: 2002-05-08

Category: Network Monitoring (RMON)

Description: Extends RMON for high-capacity networks by adding 64-bit counter support to the RMON-1 and RMON-2 statistics tables.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring HC-RMON-MIB with a free 30-day trial of IPNetwork Monitor.

What Is HC-RMON-MIB?

HC-RMON-MIB (High Capacity RMON) is a vendor-neutral IETF standards MIB that extends the classic RMON-1 (RFC 2819/RFC 1513) and RMON-2 (RFC 2021) remote monitoring frameworks with 64-bit counters suitable for high-speed links. It exposes traffic and statistics data such as media-independent packet counts, drop events, and overflow/high-capacity counter pairs used to reconstruct full 64-bit values from the original 32-bit RMON counters. Rather than hardware environmental sensors, its monitoring value lies in tracking interface throughput and packet-loss behavior at gigabit and higher speeds, helping operators detect dropped frames, counter wraps, or overflow conditions that indicate congestion or probe malfunction. It explicitly augments and depends on RFC 2819, RFC 1513, and RFC 2021 (RMON-1 and RMON-2), and is typically implemented alongside those base MIBs rather than standalone. It is commonly deployed on RMON-capable probes, switches, and routers monitoring high-bandwidth network segments. Engineers implementing or auditing this functionality typically reference the HC-RMON-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in HC-RMON-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

  • RMON probes
  • vendor-neutral, standards-based MIB, not tied to a specific manufacturer
  • high-speed switches/routers

Monitoring Examples

An operator would poll mediaIndependentTable/mediaIndependentEntry rows indexed by mediaIndependentIndex to read mediaIndependentInHighCapacityPkts and mediaIndependentOutHighCapacityPkts, combining them with the base RMON overflow counters (mediaIndependentInOverflowPkts, mediaIndependentOutOverflowPkts) to compute true 64-bit packet totals on a 10G+ link. A rising mediaIndependentDropEvents or mediaIndependentDroppedFrames count alongside stable input rates would flag probe resource exhaustion or interface congestion. The hcRmonMIBCompliances and hcRmonMIBGroups objects define conformance rather than runtime data.

What Can Be Monitored

  • high-capacity inbound/outbound packet counts
  • packet drop events
  • dropped frame counts
  • counter overflow tracking
  • per-interface traffic statistics
Imported Objects

From HCNUM-TC

CounterBasedGauge64
ZeroBasedCounter64

From RMON-MIB

OwnerString
captureOBJECT-IDENTITY
captureBufferControlIndexOBJECT-TYPE
captureBufferIndexOBJECT-TYPE
etherHistoryIndexOBJECT-TYPE
etherHistorySampleIndexOBJECT-TYPE
etherStatsIndexOBJECT-TYPE
historyOBJECT-IDENTITY
hostAddressOBJECT-TYPE
hostIndexOBJECT-TYPE
hostTimeCreationOrderOBJECT-TYPE
hostTimeIndexOBJECT-TYPE
hostTopNOBJECT-IDENTITY
hostTopNIndexOBJECT-TYPE
hostTopNReportOBJECT-TYPE
hostsOBJECT-IDENTITY
matrixOBJECT-IDENTITY
matrixDSDestAddressOBJECT-TYPE
matrixDSIndexOBJECT-TYPE
matrixDSSourceAddressOBJECT-TYPE
matrixSDDestAddressOBJECT-TYPE
matrixSDIndexOBJECT-TYPE
matrixSDSourceAddressOBJECT-TYPE
rmonOBJECT-IDENTITY
statisticsOBJECT-IDENTITY

From RMON2-MIB

ZeroBasedCounter32
alHostOBJECT-IDENTITY
alHostTimeMarkOBJECT-TYPE
alMatrixOBJECT-IDENTITY
alMatrixDSTimeMarkOBJECT-TYPE
alMatrixSDTimeMarkOBJECT-TYPE
alMatrixTopNControlIndexOBJECT-TYPE
alMatrixTopNIndexOBJECT-TYPE
hlHostControlIndexOBJECT-TYPE
hlMatrixControlIndexOBJECT-TYPE
nlHostOBJECT-IDENTITY
nlHostAddressOBJECT-TYPE
nlHostTimeMarkOBJECT-TYPE
nlMatrixOBJECT-IDENTITY
nlMatrixDSDestAddressOBJECT-TYPE
nlMatrixDSSourceAddressOBJECT-TYPE
nlMatrixDSTimeMarkOBJECT-TYPE
nlMatrixSDDestAddressOBJECT-TYPE
nlMatrixSDSourceAddressOBJECT-TYPE
nlMatrixSDTimeMarkOBJECT-TYPE
nlMatrixTopNControlIndexOBJECT-TYPE
nlMatrixTopNIndexOBJECT-TYPE
probeConfigOBJECT-IDENTITY
protocolDirLocalIndexOBJECT-TYPE
protocolDistOBJECT-IDENTITY
protocolDistControlIndexOBJECT-TYPE
rmonConformanceOBJECT-IDENTITY
usrHistoryOBJECT-IDENTITY
usrHistoryControlIndexOBJECT-TYPE
usrHistoryObjectIndexOBJECT-TYPE
usrHistorySampleIndexOBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus
TimeStamp

How to Use in IPNetwork Monitor

Example using mediaIndependentDropEvents OID:

Select a device implementing HC-RMON-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 mediaIndependentDropEvents 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. The total number of events in which packets were dropped by the probe due to lack of resources. 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 a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

Defines managed objects extending RMON for high-capacity networks, adding 64-bit counter support to RMON-1 and RMON-2 statistics tables.

Start monitoring Vendor-neutral RMON probe/switch/router, any manufacturer (High Capacity RMON) 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 HC-RMON-MIB