RTCPXR-MIB

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Organization: IETF AVT Working Group

Last Updated: 2004-07-21

Description: IETF AVT Working Group MIB for RTCP Extended Reports (RFC 3611), tracking per-session VoIP quality metrics such as jitter, packet loss, and delay for RTP/RTCP endpoints

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What Is RTCPXR-MIB?

RTCPXR-MIB is an IETF AVT (Audio/Video Transport) Working Group standards MIB implementing RTCP Extended Reports (RTCP XR) per RFC 3611, specifically the VoIP metrics report block used to convey call-quality statistics for RTP/RTCP-based voice sessions. It exposes a per-call table of VoIP quality-of-service metrics including call identification and endpoint addressing, codec/vocoder type, call duration, and network-level loss/discard statistics. It is used to monitor the software/service-level quality of active or recent VoIP calls rather than hardware vitals: rtcpXrVoipNetworkLossRate, rtcpXrVoipAverageDiscardRate, rtcpXrVoipBurstLossDensity, and rtcpXrVoipBurstLenMs reveal packet loss and burst-loss patterns that directly correlate with audible call-quality degradation, letting an administrator distinguish a healthy call from one suffering network impairment. It explicitly implements the VoIP Metrics report block defined in RFC 3611 Section 4.7 and is meant to be used alongside standard RTP/RTCP session and codec information rather than as a standalone protocol. It would be deployed on VoIP endpoints, gateways, or session border controllers/monitoring probes in IP telephony networks to track per-call voice quality, implementing the RTCPXR-MIB RFC 3611 VoIP metrics report block for that purpose.

IPNetwork Monitor allows you to monitor SNMP objects defined in RTCPXR-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, standards-based MIB, not tied to a specific manufacturer
VoIP endpoints, gateways, and session border controllers/monitoring probes

Monitoring Examples

An administrator would poll rtcpXrVoipTable/rtcpXrVoipEntry (indexed by rtcpXrVoipIndex) for a given rtcpXrVoipCallIdentifier, checking rtcpXrVoipSourceIPaddress/rtcpXrVoipSourcePort and rtcpXrVoipVocoderType alongside rtcpXrVoipNetworkLossRate and rtcpXrVoipBurstLossDensity; a call showing a high burst loss density and elevated rtcpXrVoipAverageDiscardRate over its rtcpXrVoipCallDurationMs would indicate the kind of bursty packet loss that produces audible choppy audio for that VoIP call.

What Can Be Monitored

per-call network loss rate
average discard rate
burst loss density
burst length (ms)
call duration
vocoder/codec type

Imported Objects

From IF-MIB

InterfaceIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
mib-2

OIDs

OID symbolic	OID numeric	Type	Access	Description
rtcpXrMIB	1.3.6.1.2.1.0			The managed objects of RTCP XR systems. Refer to RFC 3611, Real Time Control Protocol Extended Reports (RTCP XR) Section 4.7 VoIP Metrics
rtcpXrMIBObjects	1.3.6.1.2.1.0.1
rtcpXrVoipTable	1.3.6.1.2.1.0.1.1		not-accessible	Table of information about a receiver or receivers of RTCP XR session data. RTP hosts that receive RTCP XR session packets MUST create an entry in this table for that receiver/sender pair. RTP hosts that send RTCP XR session packets MAY create an entry in this table for each receiver to their stream using RTCP XR feedback from the RTP group.
rtcpXrVoipEntry	1.3.6.1.2.1.0.1.1.1		not-accessible	An entry in the table of call records. A row in this table is created for each RTP session endpoint participating.
INT rtcpXrVoipIndex	1.3.6.1.2.1.0.1.1.1.1	INTEGER	read-only	Index for this call.
OCT rtcpXrVoipCallIdentifier	1.3.6.1.2.1.0.1.1.1.2	OCTET STRING	read-only	Call identifier for this call (= SDES?).
IP rtcpXrVoipSourceIPaddress	1.3.6.1.2.1.0.1.1.1.3	IpAddress	read-only	Source IP address for this session.
INT rtcpXrVoipSourcePort	1.3.6.1.2.1.0.1.1.1.4	INTEGER	read-only	Source UDP Port for this call.
INT rtcpXrVoipVocoderType	1.3.6.1.2.1.0.1.1.1.5	INTEGER	read-only	Vocoder type used on this call.
INT rtcpXrVoipCallDurationMs	1.3.6.1.2.1.0.1.1.1.6	INTEGER	read-only	Duration of call in milliseconds.
INT rtcpXrVoipNetworkLossRate	1.3.6.1.2.1.0.1.1.1.7	INTEGER	read-only	Average rate of network packet loss (see RFC3611 Section 4.7).
INT rtcpXrVoipAverageDiscardRate	1.3.6.1.2.1.0.1.1.1.8	INTEGER	read-only	Average rate of discards due to jitter(see RFC3611 Section 4.7).
INT rtcpXrVoipBurstLossDensity	1.3.6.1.2.1.0.1.1.1.9	INTEGER	read-only	Density of loss and discarded packets during burst periods. (see RFC3611 Section 4.7)
INT rtcpXrVoipBurstLenMs	1.3.6.1.2.1.0.1.1.1.10	INTEGER	read-only	Average length of bursts in milliseconds (see RFC3611 Section 4.7).
INT rtcpXrVoipGapLossDensity	1.3.6.1.2.1.0.1.1.1.11	INTEGER	read-only	Density of loss and discarded packets during gap periods (see RFC3611 Section 4.7).
INT rtcpXrVoipGapLenMs	1.3.6.1.2.1.0.1.1.1.12	INTEGER	read-only	Average length of gaps in milliseconds (see RFC3611 Section 4.7).
INT rtcpXrVoipAverageOneWayDelay	1.3.6.1.2.1.0.1.1.1.13	INTEGER	read-only	Average (symmetric) one way RTCP delay on call. A value of zero may indicate that this value has not yet been determined. (see RFC3611 Section 4.7).
INT rtcpXrVoipEndSystemDelay	1.3.6.1.2.1.0.1.1.1.14	INTEGER	read-only	Average end system delay on call. A value of zero may indicate that this value has not yet been determined (see RFC3611 Section 4.7).
INT rtcpXrVoipNoiseLeveldBm	1.3.6.1.2.1.0.1.1.1.15	INTEGER	read-only	Measured received silent period noise level in dBm (see RFC3611 Section 4.7).
INT rtcpXrVoipSignalLeveldBm	1.3.6.1.2.1.0.1.1.1.16	INTEGER	read-only	Measured received signal level during talkspurts in dBm (see RFC3611 Section 4.7).
INT rtcpXrVoipLocalRERLdB	1.3.6.1.2.1.0.1.1.1.17	INTEGER	read-only	Residual Echo Return Loss measured at this endpoint (see RFC3611 Section 4.7).
INT rtcpXrVoipConversationalRCQ	1.3.6.1.2.1.0.1.1.1.18	INTEGER	read-only	Conversational quality R factor for this call (see RFC3611 Section 4.7).
INT rtcpXrVoipListeningMOSLQ	1.3.6.1.2.1.0.1.1.1.19	INTEGER	read-only	Estimated listening quality MOS for this call (see RFC3611 Section 4.7).
INT rtcpXrVoipConversationalMOSCQ	1.3.6.1.2.1.0.1.1.1.20	INTEGER	read-only	Estimated conversational quality MOS for this call (see RFC3611 Section 4.7).
INT rtcpXrVoipPlcType	1.3.6.1.2.1.0.1.1.1.21	INTEGER	read-only	Defines type of packet loss concealment used on this call (see RFC3611 Section 4.7).
INT rtcpXrVoipJitterBufferAdaptationMode	1.3.6.1.2.1.0.1.1.1.22	INTEGER	read-only	Defines if jitter buffer is in fixed or adaptive mode (see RFC3611 Section 4.7).
INT rtcpXrVoipJitterBufferAdaptationRate	1.3.6.1.2.1.0.1.1.1.23	INTEGER	read-only	Estimated adaptation rate of jitter buffer (see RFC3611 Section 4.7).
INT rtcpXrVoipJitterBufferAverageDelay	1.3.6.1.2.1.0.1.1.1.24	INTEGER	read-only	Average size of jitter buffer in mS (see RFC3611 Section 4.7).
INT rtcpXrVoipJitterBufferMaximumDelay	1.3.6.1.2.1.0.1.1.1.25	INTEGER	read-only	Maximum delay through jitter buffer at current size in mS (see RFC3611 Section 4.7).
INT rtcpXrVoipJitterBufferSize	1.3.6.1.2.1.0.1.1.1.26	INTEGER	read-only	Absolute maximum size jitter buffer can reach in mS (see RFC3611 Section 4.7).
rtcpXrConformance	1.3.6.1.2.1.0.2

RFC description

RTCP Extended Reports MIB for VoIP quality metrics including network loss, delay, and MOS scores.

Start monitoring vendor-neutral, standards-based MIB, VoIP endpoints/gateways/session border controllers (RTCP XR call quality) 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 RTCPXR-MIB

What Is RTCPXR-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description