GET command

pysnmp.hlapi.asyncio.getCmd(snmpEngine, authData, transportTarget, contextData, *varBinds, **options)

Creates a generator to perform SNMP GET query.

When itereator gets advanced by asyncio main loop, SNMP GET request is send (RFC 1905#section-4.2.1). The iterator yields asyncio.Future which gets done whenever response arrives or error occurs.

Parameters:
  • snmpEngine (SnmpEngine) – Class instance representing SNMP engine.
  • authData (CommunityData or UsmUserData) – Class instance representing SNMP credentials.
  • transportTarget (UdpTransportTarget or Udp6TransportTarget) – Class instance representing transport type along with SNMP peer address.
  • contextData (ContextData) – Class instance representing SNMP ContextEngineId and ContextName values.
  • *varBinds (ObjectType) – One or more class instances representing MIB variables to place into SNMP request.
Other Parameters:
 

**options – Request options:

  • lookupMib - load MIB and resolve response MIB variables at the cost of slightly reduced performance. Default is True.
Yields:
  • errorIndication (str) – True value indicates SNMP engine error.
  • errorStatus (str) – True value indicates SNMP PDU error.
  • errorIndex (int) – Non-zero value refers to varBinds[errorIndex-1]
  • varBinds (tuple) – A sequence of ObjectType class instances representing MIB variables returned in SNMP response.
Raises:

PySnmpError – Or its derivative indicating that an error occurred while performing SNMP operation.

Examples

>>> import asyncio
>>> from pysnmp.hlapi.asyncio import *
>>>
>>> @asyncio.coroutine
... def run():
...     errorIndication, errorStatus, errorIndex, varBinds = yield from getCmd(
...         SnmpEngine(),
...         CommunityData('public'),
...         UdpTransportTarget(('demo.snmplabs.com', 161)),
...         ContextData(),
...         ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0))
...     )
...     print(errorIndication, errorStatus, errorIndex, varBinds)
>>>
>>> asyncio.get_event_loop().run_until_complete(run())
(None, 0, 0, [ObjectType(ObjectIdentity(ObjectName('1.3.6.1.2.1.1.1.0')), DisplayString('SunOS zeus.snmplabs.com 4.1.3_U1 1 sun4m'))])
>>>