<![CDATA[Instance discovery filter - multiple OIDs]]>I have set up a DCI with instance discovery for traffic on all ports of a Cisco switch.

4 OIDs always come back as unsupported.

I have managed to get the filter script to filter out one of them with one specific OID, but how do I properly filter out unsupported OIDs?  Is there a way to tell it to ignore them if they are unsupported?

I've tried searching and my setup is similar to this:
https://www.netxms.org/forum/configuration/instance-discovery-filter-scrip/msg10449/#msg10449

This successfully filters one result:

return $1 != "5139";

These are the attempts I have made - none of them filter multiple results: (the three using SNMPGetValue don't work at all with the individual OID)

snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.31.1.1.1.6." . $1) != 5139;

snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.31.1.1.1.6." . $1) != 0;

snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.31.1.1.1.6." . $1) != "5139";

if($1 == "5139")
	return false;
if($1 == "5138")
	return false;
if($1 == "5137")
	return false;
if($1 == "12001")
	return false;

I'm sure I'm missing something obvious, any help is appreciated!

Thanks!

general.png

instance_discovery.png

transformation.png

]]>https://forum.netxms.org/topic/6028/instance-discovery-filter-multiple-oidsRSS for NodeFri, 13 Nov 2026 13:14:41 GMTTue, 02 Jul 2019 18:37:03 GMT60<![CDATA[Reply to Instance discovery filter - multiple OIDs on Mon, 08 Jul 2019 15:32:32 GMT]]>Victor, thanks.

Initially this didn't work, but then I changed:

snmp = CreateSNMPTransport($node);
return SNMPGet(snmp, ".1.3.6.1.2.1.31.1.1.1.6." . $1) != null;

To:

snmp = CreateSNMPTransport($node);
return SNMPGetValue(snmp, ".1.3.6.1.2.1.31.1.1.1.6." . $1) != null;

And it seems to be working now.

Thank you!

]]>https://forum.netxms.org/post/26096https://forum.netxms.org/post/26096Mon, 08 Jul 2019 15:32:32 GMT<![CDATA[Reply to Instance discovery filter - multiple OIDs on Mon, 08 Jul 2019 07:55:24 GMT]]>Try this filter script:

snmp = CreateSNMPTransport($node);
return SNMPGet(snmp, ".1.3.6.1.2.1.31.1.1.1.6." . $1) != null;

It will filter out all instances where SNMP-GET on .1.3.6.1.2.1.31.1.1.1.6.{instance} fails.

Best regards,
Victor

]]>https://forum.netxms.org/post/26092https://forum.netxms.org/post/26092Mon, 08 Jul 2019 07:55:24 GMT