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"""
Custom request timeout
++++++++++++++++++++++
Send SNMP GET request using the following options:
* with SNMPv2c, community 'public'
* over IPv4/UDP
* to an Agent at demo.snmplabs.com:161
* for an OID in string form
* use custom timeout and request retries values
Transport timing settings (maximum number of request retries and
individual request timeout in seconds) can be set on a per-target basis
as explained by the code that follows.
Keep in mind that while timeout value can be specified in fractions of a
second, default pysnmp timer resolution is quite low (about 0.5 sec)
so there's no much point in using timeouts which is not a multiple of 0.5
Internal timer can be programmatically adjusted to finer resolution if needed.
If retries value is set to 0, pysnmp will issue a single request. Even
if no response arrives, there will be no retry. Likewise, retries=1
means one initial request plus one retry.
Functionally similar to:
| $ snmpget -v1 -c public demo.snmplabs.com 1.3.6.1.2.1.1.1.0
"""#
from pysnmp.entity.rfc3413.oneliner.cmdgen import *
errorIndication, errorStatus, errorIndex, varBinds = next(
getCmd(SnmpEngine(),
CommunityData('public'),
UdpTransportTarget(
('demo.snmplabs.com', 161), timeout=1.5, retries=0
),
ContextData(),
ObjectType(ObjectIdentity('1.3.6.1.2.1.1.1.0')))
)
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 ]))
|
