All MIBs › DOCS-IF3-MIB › docsIf3CmStatusUsT3Timeouts
docsIf3CmStatusUsT3Timeouts
Module: DOCS-IF3-MIB
OID (symbolic): DOCS-IF3-MIB::docsIf3CmStatusUsT3Timeouts
OID (numeric): 1.3.6.1.4.1.4491.2.1.20.1.2.1.2
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: This attribute denotes the number of times counter T3 expired in the CM for this upstream channel. Discontinuities in the value of this counter can occur at re-initialization of the managed system, and at other times as indicated by the value of ifCounterDiscontinuityTime for the associated upstream channel.
What is docsIf3CmStatusUsT3Timeouts?
This OID holds a counter that increments each time a cable modem's T3 timer expires on an upstream channel. The T3 timer expiring indicates the modem failed to receive a response from the CMTS (cable head-end) within the expected timeframe, signaling a potential communication loss. A network operator checks this value to diagnose connection stability issues; if it increases rapidly, it suggests the modem is losing synchronization with the head-end.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.20.1.2.1.2 snmpwalk -v2c -c public <target> DOCS-IF3-MIB::docsIf3CmStatusUsT3Timeouts
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.20.1.2.1.2.1 snmpget -v2c -c public <target> DOCS-IF3-MIB::docsIf3CmStatusUsT3Timeouts.1
Start monitoring DOCSIS 3.0 cable modem/CMTS (channel bonding, vendor-neutral CableLabs standard) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the DOCS-IF3-MIB::docsIf3CmStatusUsT3Timeouts OID value, configure state conditions and alerts, and monitor any DOCSIS 3.0 cable modem/CMTS (channel bonding, vendor-neutral CableLabs standard) from a single console.
OID Breakdown
Upper-level ancestors (10 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.4491 | cableLabs | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2 | clabProject | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2.1 | clabProjDocsis | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2.1.20 | docsIf3Mib | CLAB-DEF-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.4491.2.1.20.1 | docsIf3MibObjects | DOCS-IF3-MIB |
| 1.3.6.1.4.1.4491.2.1.20.1.2 | docsIf3CmStatusUsTable | DOCS-IF3-MIB |
| 1.3.6.1.4.1.4491.2.1.20.1.2.1 | docsIf3CmStatusUsEntry | DOCS-IF3-MIB |
| 1.3.6.1.4.1.4491.2.1.20.1.2.1.2 | docsIf3CmStatusUsT3Timeouts | DOCS-IF3-MIB |