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.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
.. _snmpofferedapis:
Offered APIs
============
**trapd** supports the Simple Network Management Protocol (SNMP)
standard. It is a well documented and pervasive protocol,
used in all networks worldwide.
As an API offering, the only way to interact with **trapd** is
to send traps that conform to the industry standard specification
(RFC1215 - available at https://tools.ietf.org/html/rfc1215 ) to a
running instance. To accomplish this, you may:
1. Configure SNMP agents to send native traps to a SNMPTRAP instance.
In SNMP agent configurations, this is usually accomplished by
setting the "trap target" or "snmp manager" to the IP address
of the running VM/container hosting SNMPTRAP.
2. Simulate a SNMP trap using various freely available utilities. Two
examples are provided below, *be sure to change the target
("localhost") and port ("162") to applicable values in your
environment.*
NetSNMP snmptrap
----------------
One way to simulate an arriving SNMP trap is to use the Net-SNMP utility/command snmptrap.
This command can send V1, V2c or V3 traps to a manager based on the parameters provided.
The example below sends a SNMP V1 trap to the specified host. Prior to running this command, export
the values of *to_ip_address* (set it to the IP of the VM hosting the ONAP trapd container) and *to_port* (typically
set to "162"):
``export to_ip_address=192.168.1.1``
``export to_port=162``
Then run the Net-SNMP command/utility:
``snmptrap -d -v 1 -c not_public ${to_ip_address}:${to_portt} .1.3.6.1.4.1.99999 localhost 6 1 '55' .1.11.12.13.14.15 s "test trap"``
.. note::
This will display some "read_config_store open failure" errors;
they can be ignored, the trap has successfully been sent to the
specified destination.
python using pysnmp
-------------------
Another way to simulate an arriving SNMP trap is to send one with the python *pysnmp* module. (Note that this
is the same module that ONAP trapd is based on).
To do this, create a python script called "send_trap.py" with the following contents. You'll need to change the
target (from "localhost" to whatever the destination IP/hostname of the trap receiver is) before saving:
.. code-block:: python
from pysnmp.hlapi import *
from pysnmp import debug
# debug.setLogger(debug.Debug('msgproc'))
errorIndication, errorStatus, errorIndex, varbinds = next(sendNotification(SnmpEngine(),
CommunityData('not_public'),
UdpTransportTarget(('localhost', 162)),
ContextData(),
'trap',
[ObjectType(ObjectIdentity('.1.3.6.1.4.1.999.1'), OctetString('test trap - ignore')),
ObjectType(ObjectIdentity('.1.3.6.1.4.1.999.2'), OctetString('ONAP pytest trap'))])
)
if errorIndication:
print(errorIndication)
else:
print("successfully sent trap")
To run the pysnmp example:
``python ./send_trap.py``
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