def __init__(self, ip, port=161, community='private'):
""" Initialize SNMP environment and read tables.
Read entPhysicalTable and ifTable.
entPhysicalTable is saved in self.entPhysicalTable
ifTable is saved in self.ifTable
:param ip: device IP.
:param port: device SNMP port.
:param community: device community.
"""
super(AutoLoad, self).__init__()
self.snmp = QualiSnmp(ip, port, community)
self.entPhysicalTable = self.snmp.walk(
('ENTITY-MIB', 'entPhysicalTable'))
self.ifTable = self.snmp.walk(('IF-MIB', 'ifTable'))
