SNMP backend

SNMP

SNMP (Simple Network Management Protocol) is a network protocol very useful for retrieving info from a device. All the information is retrieved by using codes called MIBs. All MIBs have a tree-like structure, every main information is the root and by adding more detail to the info the tree gains more depth. Obviously, by getting the smallest MIB which is “1” or simply ” . ” one can get all the tree.

The SNMP backend provides support for 2 firmwares:

• AirOS
• OpenWRT

AirOS example

from netengine.backends.snmp import AirOS
device = AirOS("10.40.0.130")
device.name
'RM5PomeziaSNode'
device.uptime_tuple
(121, 0, 5)  # a tuple containing device uptime hours, mins and seconds

We have just called two simple properties on device, but we can ask device for more specific values or portions of the SNMP tree not included in the API, just type::

device.next(“1.3.6”)

Otherwise, if you want simply a value of the tree just type::

device.get_value(“oid_you_want_to_ask_for”)

OpenWRT example

The same instructions typed above can be applied to OpenWRT itself, just remember to import the correct firmware by typing:

from netengine.backends.snmp import OpenWRT