Building custom OID

Rana Dhekial <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <[email protected]>
Hi,
 
I have to create custom  OID out of existing OIDs in an an SNMP agent. Essentially it will be something like
 
value of Custom OID 1 = value of (Existing OID 1+ Exsisting OID 2 - Existing OID 3)

 

 

happy# snmpwalk -v2c -cpublic localhost .1.3.6.1.4.1.99999.3.2.2.2.3.9.1.2
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.1.1 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.1.2 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.1.3 = Counter32: 31
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.1.4 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.1.5 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.2.1 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.2.2 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.2.3 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.2.4 = Counter32: 0
iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.2.5 = Counter32: 0
happy#

 

So from here I need to create a custom OID which will be 

 

Value of Custom OID 1 = value of ( iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.1.3 + iso.3.6.1.4.1.99999.3.2.2.2.3.9.1.2.2.3)
 
SNMP manager will poll the Custom OID 1
 
The device delivers SNMP functionality to Net-SNMP through AgentX subagents. 
 
Can you give me some ideas as to how to do it ?
 
thanks, 

 		 	   		  
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