https://www.cisco.com/c/en/us/td/docs/ios/12_2/configfun/command/reference/ffun_r/frf014.htmlsnmp-server enable traps snmp [authentication] [linkup] [linkdown] [coldstart] [warmstart]
warmstart
(Optional) Controls the sending of SNMP warmStart notifications. A warmStart(1) trap signifies that the sending device is reinitializing itself such that neither the agent configuration nor the protocol entity implementation is altered.