Interface names in instance discovery

Reply to Interface names in instance discovery on Mon, 10 Sep 2018 17:12:03 GMT

sarangtc — Mon, 10 Sep 2018 17:12:03 GMT

Let me summarize to make it easy for other beginners like me:
for inward traffic (using the 64bit snmp oid)

In "Data Collection Confiugration:"

Description: Traffic on {instance-name} - bits/s IN
Parameter: .1.3.6.1.2.1.31.1.1.1.6.{instance}
Origin: SNMP - Unsigned Int 64bit

Transformation: Average delta per sec
Transform script: $1 * 8

Instance discovery: SNMP Walk - OIDs
Base SNMP OID: .1.3.6.1.2.1.31.1.1.1.1
Instance discovery script: return %(true, $1, $2);

For OUT traffic just change:
Description: Traffic on {instance-name} - bits/s OUT
Parameter: .1.3.6.1.2.1.31.1.1.1.10.{instance}

Reply to Interface names in instance discovery on Sat, 24 Oct 2015 08:51:19 GMT

tomaskir — Sat, 24 Oct 2015 08:51:19 GMT

Also as a side note to discussion about returning interface names.

"SNMPWalk - OIDs" now actually returns value of the OID as $2.

So now, script can look like this:

Instance discovery: SNMP Walk - OIDs
Base SNMP OID: .1.3.6.1.2.1.31.1.1.1.1

Instance discovery script:

return %(true, $1, $2);

So NetXMS will push to the script $1 as discovered instance (same as before), but now $2 is pushed to the script as the value of that OID automatically.
This makes the above script possible, and you dont have to use CreateSNMPTransport or GetInterfaceObject anymore.

Reply to Interface names in instance discovery on Sat, 24 Oct 2015 08:44:54 GMT

victor — Sat, 24 Oct 2015 08:44:54 GMT

Hi,

try to use {instance} in graph title - it should be replaced with the value seen in Thresholds -> Instance in DCI properties.

Best regards,
Victor

Reply to Interface names in instance discovery on Thu, 22 Oct 2015 11:47:38 GMT

LBKRE — Thu, 22 Oct 2015 11:47:38 GMT

Very nice......
but.....
how do i get the "instance name when" i use this DCIs as title in the Performance tab?

"%{node-name} {node-name}" doesn't work.

Greeting from Germany
Ludger

Reply to Interface names in instance discovery on Fri, 16 Jan 2015 05:44:05 GMT

glebofff — Fri, 16 Jan 2015 05:44:05 GMT

I wonder is there any reasons left to use snmp transport in such cases. We can get all interesting information from $node object and its child interfaces:

i = GetInterfaceObject($node, $1);
if (i != null && i->adminState == 1)
{
  return %(true, $1, i->name);
}
return false;

Reply to Interface names in instance discovery on Fri, 16 Jan 2015 01:05:09 GMT

rgkordia — Fri, 16 Jan 2015 01:05:09 GMT

Perfect. Thanks Tomaskir. Now that you pointed this out, I found it in the docs Works like a charm.

Regards,
Richard

Reply to Interface names in instance discovery on Sat, 24 Oct 2015 08:52:22 GMT

tomaskir — Sat, 24 Oct 2015 08:52:22 GMT

UPDATE: Please see this post:
https://www.netxms.org/forum/configuration/interface-names-in-instance-discovery/msg18102/#msg18102

Description: Traffic on {instance-name} - bits/s IN
Parameter: .1.3.6.1.2.1.31.1.1.1.6.{instance}
Origin: SNMP - Unsigned Int 64bit

Transformation: Average delta per sec
Transform script: return $1 * 8;

Instance discovery: SNMP Walk - OIDs
Base SNMP OID: .1.3.6.1.2.1.2.2.1.1
Instance discovery script:

transport = CreateSNMPTransport($node);
if (transport == null)
	return false;

// get the interface name to return as instance-name
vb = SNMPGet(transport, ".1.3.6.1.2.1.31.1.1.1.1." . $1);
if (vb == null)
	return false;

// filter out loopback
if (vb->value == "lo")
	return false;

return %(true, $1, vb->value);

Please note the node has to support the IfXTable for this script to work.