All MIBs › SNMPv2-MIB › coldStart
coldStart
Module: SNMPv2-MIB
OID (symbolic): SNMPv2-MIB::coldStart
OID (numeric): 1.3.6.1.6.3.1.1.5.1
Node type: NOTIFICATION-TYPE
Description: A coldStart trap signifies that the SNMP entity, supporting a notification originator application, is reinitializing itself and that its configuration may have been altered.
What is coldStart?
This is a standard SNMP notification sent by an agent when the system completes a full restart or cold boot, signaling that its runtime configuration may have changed. Unlike a warm start, a cold start indicates that the device lost state and reinitializes from scratch. Network monitoring systems listen for this trap to invalidate cached state, resync configuration, and trigger alerts for unplanned device restarts.
Examples
Send this trap to an SNMP manager — replace <manager> with the IP or hostname of your monitoring server (SNMPv2c):
snmptrap -v2c -c public <manager> '' SNMPv2-MIB::coldStart snmptrap -v2c -c public <manager> '' 1.3.6.1.6.3.1.1.5.1
Listen for incoming traps on the manager host (-f keeps it in the foreground, -Lo prints to stdout — useful for testing):
snmptrapd -f -Lo -c /dev/null authCommunity log public
Example snmptrapd log entry:
zoo11-linux.zoo [UDP: [192.168.30.111]:58571->[192.168.30.10]:162]: DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (30714059) 3 days, 13:19:00.59 SNMPv2-MIB::snmpTrapOID.0 = OID: SNMPv2-MIB::coldStart
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OID Breakdown
Upper-level ancestors (9 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 |
| 1.3.6.1.6 | snmpV2 | DASAN-DHCP-MIB |
| 1.3.6.1.6.3 | snmpModules | RAPID-CITY |
| 1.3.6.1.6.3.1 | snmpMIB | RAPID-CITY |
| 1.3.6.1.6.3.1.1 | snmpMIBObjects | RAPID-CITY |
| 1.3.6.1.6.3.1.1.5 | snmpTraps | RAPID-CITY |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.6.3.1.1.5.1 | coldStart | SNMPv2-MIB |