Discovery - Identifier not working correctly.

[nR9]

Hello All,

I have a query related to discovery which is as below.

1. I selected an IP of Switch Device and run quick discovery.
2. In the discovery log we can see that the identification is done based on name.
3. Discovery updated the existing CI with all discovered data. Below is the screenshot of discovery log.
   
4. Here you can see Rule 1, 2, 3 are failed and Rule 4 - Match is performed using name.
5. On investigating this further, mostly rule 3, I can see that on "cmdb_ci_hardware" table if I search using the Serial Number captured by discovery, then I am able to find 1 record. But here the same thing is failing using discovery.
6. In other to justify my observation, I tried running Identification Simulation to check if I can find any record for same serial number using discovery and below is the input and output payload of the simulation.

   Input Payload :

   {
   "items": [
   {
   "className": "cmdb_ci_hardware",
   "lookup": [],
   "values": {
   "serial_number": "FOC2034U21R"
   }
   }
   ],
   "relations": []
   }
   

   Output Payload :

   {
   "items": [
   {
   "className": "cmdb_ci_ip_switch",
   "operation": "UPDATE_WITH_DOWNGRADE",
   "sysId": "e4369f1ddb6b5b40c74cf3de3b961965",
   "identifierEntrySysId": "fb27f69cc3000200d8d4bea192d3ae67",
   "identificationAttempts": [
   {
   "identifierName": "Hardware Rule",
   "attemptResult": "SKIPPED",
   "attributes": [
   "correlation_id"
   ],
   "searchOnTable": "cmdb_ci_hardware"
   },
   {
   "identifierName": "Hardware Rule",
   "attemptResult": "SKIPPED",
   "attributes": [
   "serial_number",
   "serial_number_type"
   ],
   "searchOnTable": "cmdb_serial_number"
   },
   {
   "identifierName": "Hardware Rule",
   "attemptResult": "MATCHED",
   "attributes": [
   "serial_number"
   ],
   "searchOnTable": "cmdb_ci_hardware"
   }
   ]
   }
   ],
   "relations": []
   }
   
   
7. In above payload, we can clearly see that the match is performed using Serial Number but when doing the same using Discovery, it's failing.

Have anyone see this issue earlier. Any suggestion on this would be appreciated !!

[Michael Skov2]

Is the name from the discovery the same as the name matching the serial number in the cmdb?

[nR9]

Yes...If you see the discovery log screenshot, the identification is done using Name only which is correct but we expect that the rule before name i.e Serial Number should be considered for Identification.

[manishgupta]

Hi,

If you are able to find the record with Identification Simulation and not through discovery runs, can you check the following:

1. Is this domain separated instance, and discovery runs as different user vs when you run as Identification Simulation.

Is there an Incident created related to this issue. We can further take a look.

Thanks,

Manish

ITOM Team

[nR9]

Hello Manish,

This is not domain separated environment.

Regards,

nR.

[manishgupta]

As we discussed that Discovery itself is sending an IRE payload without "serial_number" value. In that case Serial Number "Rule 3" will be skipped/no-match. Please work with discovery team trying to figure out why "serial_number" value is not send, even if discovery probe has that data available.