Python port monitoring example

This article mainly introduces the example of how to monitor the port of a digital communication device using python. if you need it, refer to the preceding requirements for recent work, report the port usage of hundreds of connected devices required for O & M every day []. although there is a ready-made network management monitoring tool to monitor the device status, it is inconvenient to make a report and close up a small script.

Note: snmpwalk must be installed to test running on ipvtn,

Related snmp configuration is required for the target DT-PASS device.

The code is as follows:

#/Usr/bin/python
# Coding: UTF-8

Import OS, sys
Import re
From pprint import pprint

# Are you a companion? Which of the following statements are supported?
MIB = {
'Public ':{
'Ports ':{
'String': '. 1.3.6.1.2.1.2.2.1.2 ',
'Status': '. 1.3.6.1.2.1.2.2.1.8', #2 down
}
},
'Huawei ':{

},
'Cisco ':{
}
}
# Have you ever taken the helm? Master?
Def portStatus (_ s ):
If int (_ s) = 2:
Return 'drop'
Elif int (_ s) = 1:
Return 'Up'
Else:
Return 'none'

# Skip snmpwalk
Def snmpwalk (host, publicKey, iso ):
Return [I. strip () for I in OS. popen ('/usr/bin/snmpwalk-c % s-v 2c % s % s' % (publicKey, host, iso )). readlines ()]

Def getPorts (_ ip, _ public, option ):
If option = 'ports ':
PostsString = (j. split ('=') [1]. split (':') [1]. replace ('"',''). strip () for j in snmpwalk (_ ip, _ public, MIB ['public'] ['port'] ['string'])
PostsStatus = (int (j. split ('=') [1]. split (':') [1]. strip () for j in snmpwalk (_ ip, _ public, MIB ['public'] ['port'] ['status'])
Return zip (postsString, postsStatus)
Else:
Print ('On this commmnad ')

PublicKey = 'hi' # sunmp public key

HOSTS = {
'10. 221.98.2 ': {'type': 'switch', 'Origin': 'quidway', 'Public': publicKey },
'10. 221.98.3 ': {'type': 'switch', 'Origin': 'quidway', 'Public': publicKey },
'10. 221.97.108 ': {'type': 'firewall', 'Origin': 'h3c', 'Public': publicKey },
'10. 231.98.233 ': {'type': 'switch', 'Origin': 'Cisco', 'Public': publicKey },
}
If _ name _ = '_ main __':
For I in HOSTS. keys ():
For host, status in getPorts (I, HOSTS [I] ['public'], 'port '):
Print ("% s \ t % s" % (I, host. ljust (30), portStatus (status). ljust (20 )))
Print (''. ljust (50 ,'#'))

Running result

The code is as follows:

Root @ override TN12:/tmp # python snmpwalk. py
10.221.98.2 InLoopBack0 up
10.221.98.2 NULL0 up
10.221.98.2 GigabitEthernet0/0/0 down
10.221.98.2 Aux0/0/1 down
10.221.98.2 Vlanif100 up
10.221.98.2 Eth-Trunk1 down
10.221.98.2 Eth-Trunk1.32 down
10.221.98.2 Eth-Trunk1.50 down
10.221.98.2 Eth-Trunk1.60 down
10.221.98.2 Eth-Trunk1.70 down
10.221.98.2 Eth-Trunk1.80 down
10.221.98.2 Eth-Trunk1.100 down
10.221.98.2 Eth-Trunk1.110 down