NetXMS Support Forum

Hello

Could use help with dci instance discovery.

I have 2 Mikrotik wifi devices where i would like to poll ssid name. On one device it reports with .1.3.6.1.4.1.14988.1.1.1.3.1.4.1 on another one with .1.3.6.1.4.1.14988.1.1.1.3.1.4.2. The end number is changing. How can i discover that dynamicaly?

Egert

Pls see DCI configuration in the attached images. It will perform SNMP walk starting from specified OID and create DCIs for all OIDs encountered in this walk. {instance} macro will contain last part of OID, {instance-name} - value from that OID.

My Mikrotik device has two items there:
.1.3.6.1.4.1.14988.1.1.1.3.1.4.1
.1.3.6.1.4.1.14988.1.1.1.3.1.4.2
so two DCIs would been created.


The other approach is to make a script DCI, perform SNMP walk from the script and may be join results into one DCI. I can prepare example of this if needed.

Hello

i Did exactly as in picture, but for me i dont see any dci discoveries for some reason.

Edit:
When i move the dci directly to node then it works, but under template it doesn't. Maybe it needs longer time?

Edit:
After waitng for hour and no dci-s from template appeared. i deleted template and made it again, this time dci-s started apearing and it seems to work.

Second question. I have script to filter what nodes get applied to template. How can i improve on it to match different oid endings and not manualy add them?

if( $node->isSNMP ) {

    if( $node->sysDescription like "*RouterOS *" && ($node->name like "*[Ap] *") ) {
   
        transport = CreateSNMPTransport($node);
        if ( transport == null ) return NULL;

        ssid = SNMPGetValue(transport,".1.3.6.1.4.1.14988.1.1.1.3.1.4.1");
        freq = SNMPGetValue(transport,".1.3.6.1.4.1.14988.1.1.1.3.1.7.1");
       
        ssidB = SNMPGetValue(transport,".1.3.6.1.4.1.14988.1.1.1.3.1.4.2");
        freqB = SNMPGetValue(transport,".1.3.6.1.4.1.14988.1.1.1.3.1.7.2");
       
        if(ssid != null && freq != null) {
            return true;
        }else if(ssidB != null && freqB != null) {
            return true;
        }
    }
}


return false;


Yes, you can use snmpwalk from nxsl script, e.g.

transport = CreateSNMPTransport($node);
if (transport != null) {
    oid = ".1.2.840.10036.1.1.1.7";
    vars = SNMPWalk(transport, oid);
    if (vars != null) {
      foreach (v: vars) {
          println(v->name." = ".v->value);
      }
    }
}

Then you just need some logic how to parse the results returned by SNMPWalk