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 !!

[nR9 · Accepted solution]

Hello All,

Thanks for the update. Below is the update on this thread. After running discovery for multiple times what I observed is that there is some problem at device level. Identification engine is working as expected.

Trial 1 - When I run discovery in the morning, In the input payload we can see that "No Serial Number" is received. Below is the input payload sent to IRE>

Input

identification_engine : Input = {"items":[{"className":"cmdb_ci_ip_switch","values":{"short_description":"Cisco","discovery_source":"Manual Entry","name":"jNR-01","ip_address":"10.64.148.167","model_id":"924735c4dbdb970089a6b9836b96193c","sys_class_name":"cmdb_ci_ip_switch"},"lookup":[{"className":"cmdb_ci_network_adapter","values":{"netmask":"255.255.255.192","mac_address":"00:59:dc:a5:ac:5d","name":"Vlan99","ip_address":"10.64.148.167"}}],"related":[]}],"relations":[]}

Thus as Serial Number is not available, the match is done on Name. Below is the output payload.

Output

identification_engine : Output = {"items":[{"className":"cmdb_ci_ip_switch","operation":"UPDATE","sysId":"e4369f1ddb6b5b40c74cf3de3b961965","relatedSysIds":[null],"relatedItems":[{"className":"cmdb_ci_network_adapter"}],"identifierEntrySysId":"556eb250c3400200d8d4bea192d3ae92","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":"SKIPPED","attributes":["serial_number"],"searchOnTable":"cmdb_ci_hardware"},{"identifierName":"Hardware Rule","attemptResult":"MATCHED","attributes":["name"],"searchOnTable":"cmdb_ci_hardware"}]}],"relations":[]}

Trial 2 - I tried running discovery again and this time, in the below input payload we can information related to Serial number.

Input

identification_engine : Input = {"items":[{"className":"cmdb_ci_ip_switch","values":{"short_description":"Cisco","discovery_source":"ServiceNow","serial_number":"FOC2034U21R","ip_address":"10.64.148.167","sys_class_name":"cmdb_ci_ip_switch"},"lookup":[{"className":"cmdb_serial_number","values":{"valid":"true","serial_number":"FOC2034U21R","serial_number_type":"physical"}},{"className":"cmdb_ci_network_adapter","values":{"netmask":"255.255.255.192","mac_address":"00:59:dc:a5:ac:5d","name":"Vlan99","ip_address":"10.64.148.167"}}],"related":[]}],"relations":[]}

Thus in the output payload we can see match based on Serial Number and Serial Number Type.

Output

identification_engine : Output = {"items":[{"className":"cmdb_ci_ip_switch","operation":"UPDATE","sysId":"e4369f1ddb6b5b40c74cf3de3b961965","relatedSysIds":["c7442c36dba823800d17a5ca0b9619a9","5615929fdb28e3800d17a5ca0b9619a1"],"relatedItems":[{"sysId":"c7442c36dba823800d17a5ca0b9619a9","className":"cmdb_serial_number"},{"sysId":"5615929fdb28e3800d17a5ca0b9619a1","className":"cmdb_ci_network_adapter"}],"identifierEntrySysId":"c12f9be8c3400200d8d4bea192d3aea6","identificationAttempts":[{"identifierName":"Hardware Rule","attemptResult":"SKIPPED","attributes":["correlation_id"],"searchOnTable":"cmdb_ci_hardware"},{"identifierName":"Hardware Rule","attemptResult":"MATCHED","attributes":["serial_number","serial_number_type"],"searchOnTable":"cmdb_serial_number"}]}],"relations":[]}