DOCS-QOS3-MIB :: docsQosServiceFlowBufferSize

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsDOCS-QOS3-MIBdocsQosServiceFlowBufferSize

docsQosServiceFlowBufferSize

Module: DOCS-QOS3-MIB

OID (symbolic): DOCS-QOS3-MIB::docsQosServiceFlowBufferSize

OID (numeric): 1.3.6.1.4.1.4491.2.1.21.1.3.1.17

Node type: OBJECT-TYPE

Type: Unsigned32

Access: read-only

Description: This attribute specifies the buffer size for the service flow. For the CM this attribute only applies to upstream Service Flows, for the CMTS this attribute only applies to downstream Service Flows, in other cases it is reported as 0.

What is docsQosServiceFlowBufferSize?

This object specifies the buffer space allocated for a DOCSIS service flow, measured in bytes, to temporarily store packets in transit between upstream and downstream directions. Cable modem (CM) operators use this to understand upstream buffering capacity; cable modem termination system (CMTS) operators use it for downstream traffic. Different values apply depending on whether the service flow is on the cable modem or CMTS side.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.21.1.3.1.17
snmpwalk -v2c -c public <target> DOCS-QOS3-MIB::docsQosServiceFlowBufferSize

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.21.1.3.1.17.1
snmpget -v2c -c public <target> DOCS-QOS3-MIB::docsQosServiceFlowBufferSize.1

Start monitoring DOCSIS 3.0/3.1 cable modem/CMTS (QoS bonded-channel, vendor-neutral CableLabs standard) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the DOCS-QOS3-MIB::docsQosServiceFlowBufferSize OID value, configure state conditions and alerts, and monitor any DOCSIS 3.0/3.1 cable modem/CMTS (QoS bonded-channel, vendor-neutral CableLabs standard) from a single console.

OID Breakdown

Upper-level ancestors (10 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.4491cableLabsCLAB-DEF-MIB
1.3.6.1.4.1.4491.2clabProjectCLAB-DEF-MIB
1.3.6.1.4.1.4491.2.1clabProjDocsisCLAB-DEF-MIB
1.3.6.1.4.1.4491.2.1.21docsQos3MibCLAB-DEF-MIB
Numeric OIDNameModule
1.3.6.1.4.1.4491.2.1.21.1docsQosMibObjectsDOCS-QOS3-MIB
1.3.6.1.4.1.4491.2.1.21.1.3docsQosServiceFlowTableDOCS-QOS3-MIB
1.3.6.1.4.1.4491.2.1.21.1.3.1docsQosServiceFlowEntryDOCS-QOS3-MIB
1.3.6.1.4.1.4491.2.1.21.1.3.1.17docsQosServiceFlowBufferSizeDOCS-QOS3-MIB