"SNMP Identify" shared library pattern retrieves invalid Serial Number such as EndOfMibView, NoSuchInstance and NoSuchObject which cause IRE to update single CI repeatedly - Known Error

"SNMP Identify" shared library pattern retrieves invalid Serial Number such as EndOfMibView, NoSuchInstance and NoSuchObject which cause IRE to update single CI repeatedly Description The "SNMP Identify" shared library pattern retrieves invalid Serial Number such as EndOfMibView, NoSuchInstance and NoSuchObject. Various main Discovery Patterns use this.

Symptoms:

In a discovery schedule run that contains multiple switches or routers, this will result in IRE identifying them as having the same serial number and will update a single CI repeatedly. It won't be able to create different CIs.

There could be a number of reasons why EndOfMibView, NoSuchInstance and NoSuchObject can be returned. - https://snmpsharpnet.com/index.php/2009/03/11/snmp-v2c-and-v3-endofmibview-nosuchinstance-and-nosuchobject-types/ - https://community.microfocus.com/t5/Network-Management-OpenView-NNM/End-of-MIB-View/td-p/701619

So far, we have identified the issues for below devices:

1.3.6.1.4.1.248.14.10.41 - Manufacturer: Richard Hirschmann GmbH & Co. - Model: RS40 1.3.6.1.4.1.1027.1.2.3 - Manufacturer: Mitel, Corp. - Model: 3300 CX-II Controller The logic should have filtered these types of Serial Number out, as we do already for some other obviously nonsense values. If there is no serial number obtained, the pattern should result in failure with proper error/warning message.

Steps to Reproduce

Run discovery for multiple switches that are currently not supported OOB. Check that discovery only able to create a single switch CI. In the history of the CI, we can see several updates for all the CIs that supposed to be created separately. Observe the discovery log of Network Switch pattern for all CIs and see EndOfMibView is always set as Serial Number. Workaround This problem has been fixed. If you are able to upgrade, review the Fixed In or Intended Fix Version fields to determine whether any versions have a planned or permanent fix.

A temporary workaround, and instruction on cleaning up the bad serial number values and records already created, is available in: KB0829029 SNMP discovery returning serial number as "endOfMibView"