Modifying variables

Coerce value to SET to MIB spec

Send SNMP SET request using the following options:

  • with SNMPv2c, community ‘public’
  • over IPv4/UDP
  • to an Agent at demo.snmplabs.com:161
  • setting SNMPv2-MIB::sysName.0 to new value (type taken from MIB)

Functionally similar to:

$ snmpset -v2c -c public demo.snmplabs.com SNMPv2-MIB::sysDescr.0 = “new system name”
from pysnmp.hlapi import *

errorIndication, errorStatus, errorIndex, varBinds = next(
    setCmd(SnmpEngine(),
           CommunityData('public'),
           UdpTransportTarget(('demo.snmplabs.com', 161)),
           ContextData(),
           ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysORDescr', 1),
                      'new system name'))
)

if errorIndication:
    print(errorIndication)
elif errorStatus:
    print('%s at %s' % (errorStatus.prettyPrint(),
                        errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
else:
    for varBind in varBinds:
        print(' = '.join([x.prettyPrint() for x in varBind]))

Download script.

SET scalars values

Send SNMP SET request using the following options:

  • with SNMPv1, community ‘public’
  • over IPv4/UDP
  • to an Agent at demo.snmplabs.com:161
  • setting three var-bindings to new values

Please note, that in this example MIB lookup is only used for the second var-bindins. For the rest, value types are inferred from passed objects.

Functionally similar to:

$ snmpset -v1 -c public demo.snmplabs.com 1.3.6.1.2.1.1.9.1.2.1 o 1.3.6.1.4.1.20408.1.1 1.3.6.1.2.1.1.9.1.2.1 = 1.3.6.1.4.1.20408.1.1 1.3.6.1.2.1.1.9.1.3.1 s “new system name”
from pysnmp.hlapi import *

errorIndication, errorStatus, errorIndex, varBinds = next(
    setCmd(SnmpEngine(),
           CommunityData('public', mpModel=0),
           UdpTransportTarget(('demo.snmplabs.com', 161)),
           ContextData(),
           ObjectType(ObjectIdentity('1.3.6.1.2.1.1.9.1.2.1'),
                      ObjectIdentifier('1.3.6.1.4.1.20408.1.1')),
           ObjectType(ObjectIdentity('1.3.6.1.2.1.1.9.1.2.1'),
                      '1.3.6.1.4.1.20408.1.1'),
           ObjectType(ObjectIdentity('1.3.6.1.2.1.1.9.1.3.1'),
                      OctetString('new system name')))
)

if errorIndication:
    print(errorIndication)
elif errorStatus:
    print('%s at %s' % (errorStatus.prettyPrint(),
                        errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
else:
    for varBind in varBinds:
        print(' = '.join([x.prettyPrint() for x in varBind]))

Download script.

See also: library-reference.