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Full Discussion: Need help with creating a script for Snmpwalking
Top Forums Shell Programming and Scripting Need help with creating a script for Snmpwalking Post 302970073 by tuscanitunr on Friday 1st of April 2016 11:52:25 AM
Old 04-01-2016
Need help with creating a script for Snmpwalking
Hello,

Very new to scripting, basically learning on the job. So, I have a task I'm trying to complete. What I need is comparing an input file and running the snmpwalk command to find out which 3 community strings a device is using.

this is what I have so far:

(I've replaced what the community string is with just community01/02/03)

Code:
while read line
do
                device_ip=`echo $line | cut -f1 -d","`
                
		device_name=`echo $line | cut -f2 -d","`
		
		alarm_title=`echo $line | cut -f3 -d","`


if [[ $alarm_title == "MANAGEMENT AGENT LOST" ]]; then
		snmpwalk01=`snmpwalk -v 2c -c community01 "$device_ip" sysName.0`
		
		if [[ -z "$snmpwalk01" ]; then
			snmpwalk02=`snmpwalk -v 2c -c community02 "$device_ip" sysName.0`

			if [[ -z "$snmpwalk02" ]]; then
				snmpwalk03=`snmpwalk -v 2c -c community03 "$device_ip" sysName.0`
				
				if [[ -z "$snmpwalk03" ]]; then
					echo "$device_name"="unknown"
				fi					
			fi

		fi
fi

I'm sure I've completely butchered everything...but this is what I've got by googling, looking at scripts already on the server, etc etc.

Like I said, I have an input file that has the Device IP, Device Name, and the Alarm Detail. Not all of the alarm details are "Management Agent Lost". What I'm trying to do is take one line from that input file, see if the community01 works as a community string. If it doesn't, then test community02. If that doesn't work, test 03.

If none work, echo the device name and the result.
If one of them works, echo device name and the community string that does work.
 

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LEARN ABOUT REDHAT

snmpwalk

SNMPWALK(1)							     Net-SNMP							       SNMPWALK(1)

NAME

       snmpwalk - communicates with a network entity using SNMP GETNEXT requests.

SYNOPSIS

       snmpwalk [APPLICATION OPTIONS] [COMMON OPTIONS] [OID]

DESCRIPTION

       snmpwalk is an SNMP application that uses SNMP GETNEXT requests to query a network entity for a tree of information.

       An  object  identifier  (OID)  may  be  given on the command line.  This OID specifies which portion of the object identifier space will be
       searched using GETNEXT requests.  All variables in the subtree below the given OID are queried and their  values  presented  to	the  user.
       Each variable name is given in the format specified in variables(5).

       If  no  OID  argument  is  present, snmpwalk will search MIB-2.	If the network entity has an error processing the request packet, an error
       packet will be returned and a message will be shown, helping to pinpoint why the request was malformed.

       If the tree search causes attempts to search beyond the end of the MIB, the message "End of MIB" will be displayed.

OPTIONS

       -Cc     Do not check whether the returned OIDs are increasing.  Some agents (LaserJets are an example) return OIDs out of  order,  but  can
	       complete the walk anyway.  Other agents return OIDs that are out of order and can cause snmpwalk to loop indefinitely.  By default,
	       snmpwalk tries to detect this behavior and warns you when it hits an agent acting illegally.  Use -Cc to turn off this behaviour.

       -Ci     Include the given OID in the search range.  Normally snmpwalk uses GETNEXT requests starting with the OID you specified and returns
	       all  results  in  the  MIB  tree  after	that OID.  Sometimes, you may wish to include the OID specified on the command line in the
	       printed results if it is a valid OID in the tree itself.  This option lets you do this.

       -Cp     Upon completion of the walk, print the number of variables found.

       In addition to these options, snmpwalk takes the common options described in the snmpcmd(1) manual page.

EXAMPLE

       The command:

       snmpwalk -Os -c public -v 1 zeus system

       will retrieve all of the variables under system:

       sysDescr.0 = STRING: "SunOS zeus.net.cmu.edu 4.1.3_U1 1 sun4m"
       sysObjectID.0 = OID: enterprises.hp.nm.hpsystem.10.1.1
       sysUpTime.0 = Timeticks: (155274552) 17 days, 23:19:05
       sysContact.0 = STRING: ""
       sysName.0 = STRING: "zeus.net.cmu.edu"
       sysLocation.0 = STRING: ""
       sysServices.0 = INTEGER: 72

SEE ALSO

       snmpcmd(1), snmpbulkwalk(1), variables(5).

4th Berkeley Distribution					    08 Feb 2002 						       SNMPWALK(1)
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