Instance Discovery Filter Script [SOLVED]
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Hello, I will reply here so others can try to help too.
DESCRIPTION -interface traffic: {instance}
PARAMETER -1.3.6.1.2.1.2.2.1.16.{instance}
base OID to .1.3.6.1.2.1.2.2.1.16
snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1) != 0;Not sure if it is the problem you encountered but I had problems with this structure because there is no guarantee there will be 0 value, there can be null too so I wrote it like this:
snmp = CreateSNMPTransport($node);
x = SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1);
if (x != null) return (x > 0);
else return 0;p.s. does it mean you get the desired DCI with correct OID on all of your nodes but the value there is 0 or it creates unwanted DCIs with wrong OID?
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hi Sperlm,
thank you for replying back.
[/quote]Not sure if it is the problem you encountered but I had problems with this structure because there is no guarantee there will be 0 value, there can be null too so I wrote it like this:snmp = CreateSNMPTransport($node);
x = SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1);
if (x != null) return (x > 0);
else return 0;[/quote]i tried this Script on the instance discovery tab of Template than applied to Node i get the DCI for Non Zero values interfaces [ like 1,2,9,10,33] pls check on attachment but when i see the collected values for these DCI it shows 0 value...
[/quote]p.s. does it mean you get the desired DCI with correct OID on all of your nodes but the value there is 0 or it creates unwanted DCIs with wrong OID?
[/quote]yes getting 0 value. why it does not give the values of traffic on interfaces.
Regards,
Percy
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@sperlm said in Instance Discovery Filter Script [SOLVED]:
Hello, I will reply here so others can try to help too.
DESCRIPTION -interface traffic: {instance}
PARAMETER -1.3.6.1.2.1.2.2.1.16.{instance}
base OID to .1.3.6.1.2.1.2.2.1.16
snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1) != 0;Not sure if it is the problem you encountered but I had problems with this structure because there is no guarantee there will be 0 value, there can be null too so I wrote it like this:
snmp = CreateSNMPTransport($node);
x = SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1);
if (x != null) return (x > 0);
else return 0;p.s. does it mean you get the desired DCI with correct OID on all of your nodes but the value there is 0 or it creates unwanted DCIs with wrong OID?
@percy said in Instance Discovery Filter Script [SOLVED]:
hi Sperlm,
thank you for replying back.
Not sure if it is the problem you encountered but I had problems with this structure because there is no guarantee there will be 0 value, there can be null too so I wrote it like this:
snmp = CreateSNMPTransport($node);
x = SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1);
if (x != null) return (x > 0);
else return 0;
[/quote]
i tried this Script on the instance discovery tab of Template than applied to Node i get the DCI for Non Zero values interfaces [ like 1,2,9,10,33] pls check on attachment but when i see the collected values for these DCI it shows 0 value...[/quote]
p.s. does it mean you get the desired DCI with correct OID on all of your nodes but the value there is 0 or it creates unwanted DCIs with wrong OID?
[/quote]
yes getting 0 value. why it does not give the values of traffic on interfaces.
[/quote] -
Hi,
do a snmpwalk on the device with .1.3.6.1.2.1.2.2.1.16 value.
It should list all subsequent oids (.1.3.6.1.2.1.2.2.1.16.0, .1.3.6.1.2.1.2.2.1.16.1 etc..) with values and see if there are values in 1, 2, 9, 10, 33.One more thing - Instance discovery method should be SNMP Walk - OIDs (but I suppose you've got that right).
With regards,
Milan -
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hi..,
i didn't change anything in delta calculation but a little change in this Script.
snmp = CreateSNMPTransport($node);
x = SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1);
if (x != null) return x; // you gave me like this return (x > 0 );
else return 0;i am also confused how it started collecting data. due to that change in the script or happened automatically. but still there is 0 value for the other interfaces (10,2.33) strange why it gives for 1,9 did you notice this in screenshots.
thank you,
Percy -
@victor said in Instance Discovery Filter Script [SOLVED]:
Hi!
You actually thinking in right direction - you can use SNMPGet function to read value of each instance and determine to include it or not. Below is a working example of such approach. I use OID .1.3.6.1.2.1.2.2.1.16 (ifOutOctets) as a base. I use
Port traffic: {instance}
as description and
.1.3.6.1.2.1.2.2.1.16.{instance}
as parameter name. Correct parameter name is important, because {instance} will be the part after base OID you configure on instance discovery page, not the full OID.
Then, on instance discovery page, I set discovery method to "SNMP Walk - OIDs", set base OID to .1.3.6.1.2.1.2.2.1.16, and use the following filtering script:
snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.2.2.1.16." . $1) != 0;Now just close data collection configuration for the node and run configuration poll. You should get DCIs for all OIDs with non-zero value.
Best regards,
Victor@victor said in Instance Discovery Filter Script [SOLVED]:
This filtering script checks that absolute value for given OID is 0. If you have non-zero value which is not changing over time, OID will pass filter but you will still get 0 as delta value.
So I changed from delta value to original value and i'm still getting 0 values. Absolute values all are 0s (checked with snmpwalk).
Where is the problem?
Configuration is the same, except oid is now .1.3.6.1.2.1.31.1.1.1.3. (CRCAlignErrors) where all values are 0:@nikk said in Instance Discovery Filter Script [SOLVED]:
My parameter is: .1.3.6.1.2.1.31.1.1.1.10.{instance}
and in Instance tab:
SNMP Walk - OID's
.1.3.6.1.2.1.31.1.1.1.10and script:
snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.31.1.1.1.10." . $1) != 0; -
Check that you really get the value with SNMPGetValue - it will return null if SNMP query fails for some reason, and null != 0, so instance that cannot be read will be accepted.
Best regards,
Victor -
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Hi,
!= null should work. Can you show full script please?
Best regards,
Victor -
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Hi!
Condition (value != null || value != 0) is always true - if value is null then it will not be 0, and vise versa. Correct condition will be (value != null && value != 0), so full script could look like this:
snmp = CreateSNMPTransport($node); value = SNMPGetValue(snmp, ".1.3.6.1.2.1.16.1.1.1.3." . $1); return (value != null) && (value != 0);you are right, returning 0 is the same as returning false.
Best regards,
Victor -
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The filter discussed above is for the instanced DCIs, right ?
At the time of applying of the DCI it checks if there are values (non-zero and non-null) and creates real DCI for that one OID.Where exactly are you getting those 0 values ?
If there are semi-stable values in the OIDs and DCIs are created at that time, these will exist even if OID return 0 afterwards... Check history of the DCIs which are showing 0 now.
You can also check snmpwalk if the 0 value is correct or not.
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